View Full Version : Dakinstein (TM)


Dakin Engineering
16th December 2007, 22:55
My bud already named it, so...
http://xlforum.net/photopost/data/500/medium/efi_5.jpg

the other side

http://xlforum.net/photopost/data/500/medium/efi_4.jpg

Thank you, Daniel.

Sam

DC in PHX
16th December 2007, 22:59
Any relation to Blackula?

http://www.youtube.com/watch?v=DvR6nfsIk3E

DC

rottenralph
16th December 2007, 23:16
What in HELL is it? I see the turbo and the sporty engine but I believe we need to know what it is going to be next?

wabiker
16th December 2007, 23:30
...I guess'n a bad A$$ snowblower or Lawnmower...

SportsterBart
16th December 2007, 23:36
morepicsplzkthnx

snowman
16th December 2007, 23:59
...I guess'n a bad A$$ snowblower or Lawnmower...


If it's a snowblower, bring that beeoch here to Saline and get rid of this 8" snowfall we just had.....:banana:banana:banana

decman
17th December 2007, 00:18
Sam,

With an exhaust system like that, do you really need a frame?

That might be the thing in MC design. Exhaust in frame technology....

Dec

Dakin Engineering
17th December 2007, 00:35
Dec,
Them folks in tech are such safety nannies, but I let them have their way.

Snowblower? Only if it gets to 23 1/2" deep.

Think white, no snow... ;)

Sam

whittlebeast
17th December 2007, 01:37
Post this over at www.msefi.com and hope the efahl or dieselgeek chine in. Mention that you really are looking for constructive comments and not just a stroking. You will get all sorts of input. Make sure you mention what you are doing with it. My two big concerns getting the o2s in there to get a true AFR off the cylinder that is on a real short exhaust tube. You have to be dead on on AFR on both cylinders or you are history at 100% power for that much time. The cool part of this is that you could run it in closed loop all the way up to the finish lights. Dieselgeek over there does lots of LSR stuff. Include that Andy Whittle had you post over there and was looking for input. That will help make the big guns chine in earlier.

AW

Dakin Engineering
17th December 2007, 02:28
Andy,
Many thanks,
Sam

NRHS Sales
18th December 2007, 16:20
I am so glad I gave you those heads in place of that set you sent me. I would just cringe if those other heads made it into pics on this forum! :)

Dakin Engineering
18th December 2007, 17:03
Dan, I gotta agree. Too bad the pics don't show your work on the inside, sweet!

Sam

bplinson
18th December 2007, 17:13
Thanks for the photos Sam....now I am gonna have nightmares for the next two weeks at least!

jrossty
18th December 2007, 17:27
oOOo, that looks like fun:D:D:tour:tour

My bud already named it, so...
http://xlforum.net/photopost/data/500/medium/efi_5.jpg

the other side

http://xlforum.net/photopost/data/500/medium/efi_4.jpg

Thank you, Daniel.

Sam

NRHS Sales
18th December 2007, 17:48
Are you planning on going to the Bubs meet this year Sam?

Dakin Engineering
18th December 2007, 22:36
Somebody's gettin my money; BUB, USFRA, World Finals. (BUB better get their starting line problem fixed.) If they can do that, I'm there.

Sam

NRHS Sales
22nd December 2007, 16:27
Make sure you write to Delvene at Bubs and voice your concerns about the starting line. If enough people complain but also offer up postive suggestions things will change.

Dakin Engineering
23rd December 2007, 01:07
I'll write her when I can compose a diplomatic letter. Watching bikes do laps while I sweat in my leathers is too much of an expense.

I had a warm welcome my first time out, the World Finals was less so. World of Speed and the USFRA were my first and best experience, so far.

I'll send the letter, but until I read different, I'm planning on World of Speed in September.

Sam

Irondrake77
23rd December 2007, 01:12
I think it's some sorta dunebuggy of sorts. I see the intake is hooked up to box mounted at the front of the engine. just the sorta thing to get big air in, but keep big dirt out. Just my guess

findangle
23rd December 2007, 03:00
Yeah I'm thinking sand rail..

Dakin Engineering
23rd December 2007, 23:12
Thanks for playing, here's another pic.
Been prototyping an airbox this weekend.

http://xlforum.net/photopost/data/500/medium/airbox_8.jpg

Sam

Irondrake77
24th December 2007, 02:25
Ok, I got it, it's an Ultralight. one of those motorized hangglider things. Am i close?

Dakin Engineering
31st December 2007, 06:14
Bert,
I know it's only been a week; perhaps I can help with the nightmares.
Here's the finished piece. Seems I can't give up stainless and TIG.
http://xlforum.net/photopost/data/500/medium/airbox_installed.jpg


Ultralight, huh? K, cross that with a hill climber.....:smoke

Sam

Dakin Engineering
2nd January 2008, 03:02
Here's a pretty pic before pressure testing (and pin hole repair). From here, intercooler will get coated and boxed. The plenum will get bungs for MAP and IAT.

http://xlforum.net/photopost/data/500/medium/pressure_test_2.jpg



Sam

JonnyRtn
2nd January 2008, 03:20
Salt flat runner.....white but not snow.

sprtrjl
2nd January 2008, 03:21
Looks like he's building a turbo for a Sportster Streamliner.

Maybe there will be a movie titled "World's Fastest Sportster!"

Dakin Engineering
2nd January 2008, 03:45
There is a "Worlds Fastest Sportster." At least the one I count. Early 70's, a nitro rig did 206 mph. One pass, no record; but....

Sam

rottenralph
2nd January 2008, 04:00
I think it would be great if you built the worlds fastest. Maybe we need team forum. If every member donated a little you might get there quicker. We could all show up on race day. Do you have sponsors or is this a solo dream.

Sleeper
2nd January 2008, 04:15
Salt flat runner.....white but not snow.

Beat me to the punch.

Dakin Engineering
2nd January 2008, 05:03
Ralph,
Yes, it is a personal quest, but I have yet to turn down a cold one when the bike is parked.

I have accepted donations in the past to fund my effort. And then put the donors name on the entry.

I ain't askin; go's against my grain. But I won't turn down help.

Sam

Dakin Engineering
9th April 2008, 19:57
I built a one piece intake. Sorry about the gloss; I thought I had the flat black.
http://xlforum.net/photopost/data/500/medium/My_DD_EFI_manifold.jpg

TrueAmerican
10th April 2008, 00:05
Mr. Dakin, where in the hell in Kansas are you? I'm interested in a Sporty based turbo dragbike and I'm in El Dorado.

Dakin Engineering
10th April 2008, 00:53
Due east of ya on the border. About 50 miles south of KC. Louisburg is closest.

Sam

Dakin Engineering
4th June 2008, 19:55
Fixed my welder (whew).
http://xlforum.net/photopost/data/500/medium/O2_bung.jpg

thatbikerguy
4th June 2008, 20:08
...How bout 1 photo of the entire thing? Close ups are nice, HOWEVER.......

ChuckinPA
4th June 2008, 20:17
Sam,

With open air so close to the O2 sensor, will you get a true reading? Or is there more pipe to be attached to the turbo outlet stub?

Chuck

Dakin Engineering
4th June 2008, 22:31
Had the same question until I talked with a guy with the same setup.
He got the same readings with a 3" long pipe as a 30" long.
Now waiting for the MicroSquirt......

Sam

cjburr
4th June 2008, 23:01
I think the member "Whittlebeast" here has a great amount of knowledge concerning the Microsquirt if you have any questions when you get it.

I've heard lots of good things about it and there is a forum dedicated to it also.

Chris

rottenralph
5th June 2008, 00:13
How come in one photo it looks like a carb attached to the turbo and now you have fuel injection. Just curious why thechange or was that always the plan. Does this make your turbo a blow threw turbo also? You know I am going to ask a thousand questions because my turbo just arrived and you are the expert. Thanks for all your help and good luck on the project. How much boost are you planning on running?

Dakin Engineering
5th June 2008, 13:04
tbg,
Engine pics this afternoon.

CJ,
whittlebeast has been a great help already.

RR,
Yup, it was in the Grand Scheme of Things when I started the design a couple years ago. The carb was a year ago, a just-in-case I was able to get to Bonny. The IHI turbo has an internal wastegate set for ~8 pounds. Higher boost can be made a couple of ways...

Ask away,
Sam

whittlebeast
5th June 2008, 14:21
Is that a wide band o2?

I bet you could tune on a longggggg exhaust and then change to the short one for racing.

Are you planning on running closed loop at full throttle on the track?

Did you guys know we do wireless remote data logging that in a place like the salt flats would work for about the last mile or so?

PS I love this $hit

AW

Dakin Engineering
5th June 2008, 23:52
Yup, it's an LC-1 from Innovative.
If it will operate to 6500 RPM, closed loop all the way.
Wireless has my interest, but getting a MicroSquirt in hand has my attention right now.
(Got one I can use to start wiring to?)
Good thing I got room left for the boxes...
http://xlforum.net/photopost/data/500/medium/June_08_top.jpg

Fresh left and right side pics in my Gallery.

Sam

whittlebeast
6th June 2008, 11:20
Call DIYAutotune.com All you need is the microsquirt wire harnice.

AW

Dakin Engineering
30th July 2008, 00:29
45 days out and still no box for the EFI.

Back on the carb, new low pressure pump.
Gave notice today, vacation starts Sept 15....

Sam
#6062

rottenralph
30th July 2008, 00:50
I hate to sound like a retard but what do you mean by no box for the fuel injection?

Dakin Engineering
30th July 2008, 16:01
The black box that has the fuel injection computer. I've been accused of breaking with (DE) tradition by not building my own from scrap. Perhaps this winter....

Sam

Rchop
31st July 2008, 14:24
What happened to the pics? I can't see any of them:frownthre

Dakin Engineering
31st July 2008, 23:46
Sorry 'bout that. Too many pics. I will take a pic of the system when I get done riding my hardtail chopper. Couple more days and back to work on the bike. 7-12's last 31 days...

http://xlforum.net/photopost/data/500/medium/Old_Red.jpg

rottenralph
1st August 2008, 00:32
Just thought I would share this turbo setup I just saw on ebay. I know you love your turbos and all. Dual cv40 carbs is an interesting touch. http://i23.ebayimg.com/05/i/001/01/7b/d5ee_1.JPG

http://i2.ebayimg.com/01/i/001/01/7b/de85_1.JPG

Dakin Engineering
1st August 2008, 01:04
RR, that is truly awesome. Thinking of the work involved, wow! Does it run?
(ducking and running)

Here's my simple effort, waiting on a box. (the throttle body is OEM)
http://xlforum.net/photopost/data/500/medium/take_offs.jpg

Sam

Dakin Engineering
1st August 2008, 23:16
It may not look like a lot, but that's a year's worth of R&D.
Next year...

Sam
#6062

rottenralph
3rd August 2008, 20:59
I asked the guy how he managed the fuel and he said he used hiflow petcocks and that is it. I am not sure how he would run it without pressurizing the carb bowl but maybe he knows something I have not read yet. He has two NOS bottles and I thought thoat nos required a fuel pump and regulator and maybe it is doing what it needs to without him thinking about it. He said he had 5 miles on it and that it required some additional tuning to get the carbs set right. That bike also has NOS. I imagine if it does work it might be some fun to ride on the street. The welding is beautiful and the airbox he made is neatly placed also.

Dakin Engineering
4th August 2008, 00:29
I need about 10-12 more pics...

Sma

rottenralph
4th August 2008, 21:11
Sam, what is the purpose of the airbox? With your intake plenum going directly to the carb, what is the reason an airbox is used. Does it have a special pupose? Would a large intercooler have the same effect? One other question, I read somewhere that the offset inlet on the plenum required more boost than a center inlet on the plenum. Apparently aerotech changed the plenum on the second generation turbo to enter the center of the plenum and that allowed them to generate the same amount of power with lower boost levels.

Do you want me to remove the pics?

Dakin Engineering
5th August 2008, 00:50
My plenum, intercooler, and FI intake had to be swapped out. It was replaced with a rigid conventional style intake, a contorted intake runner, and a re-clock of the cold side of the turbo. Carb goes where the throttle body used to be.

Just finished 5 weeks of 7-12's, Back to work on the bike tomorrow. (?)

Plenum design is a black art, as far as I can tell. What works, works. I had 20 HP lost in my first intake design....

Sam

ol38y
6th August 2008, 02:20
I need about 10-12 more pics...

Sma

Sam, We need more pics. If I can't color I need pics to look at. :banana

Keep us informed. I'm thinking I might try a turbo down the road so I'm hoping to learn something here if you don't mind.

Larry :smoke

I have pics of tractors. :doh

Dakin Engineering
9th August 2008, 21:05
Here's the "plenum" for the carb setup. Most important thing; ~smooth~. No sharp bends.

http://xlforum.net/photopost/data/500/medium/carb_intake.jpg



Mounted the low pressure fuel pump and cleaned up the wiring.

http://xlforum.net/photopost/data/500/medium/low_pressure_pump.jpg

rottenralph
9th August 2008, 21:24
What pressure do you run in relation to the boost pressure?

What would happen if you put something like the elbow from a force winder on for your plenum? Why is the dome shaped plenum the shape of choice?

Dakin Engineering
10th August 2008, 00:42
Since it's a draw-thru, I just need to keep the bowl from going dry. 2-4 pounds.
Plenum 101; Large enough to hold one cylinder's volume AND small enough to be fully compressed before the next intake opens (at top RPM).
Why a dome? Round corners don't eddy as bad?

If you recognize this fender, it's because Scott sent it to me.
http://xlforum.net/photopost/data/500/medium/ff_right_side.jpg

Thank you Scott! Hugs for the women folk.
Sam

rottenralph
10th August 2008, 18:11
What cams are you running in Dakinstein? How many cc's is the engine?

Dakin Engineering
11th August 2008, 01:44
Stock cams.
883, the 1200 set is at Dan's for a hone and gapless 2nd right now.
Of course there is a pair of NRHS heads....

Sam

rottenralph
11th August 2008, 02:59
Are you using flat top pistons or reverse dome conversion pistons?

Dakin Engineering
11th August 2008, 14:11
Wiseco conversions.
Been on the shelf since the 88" build.

Sam

Dakin Engineering
12th August 2008, 21:25
I have a .wav file, but I don't know how to upload it.

HALP!

Sam

NRHS Sales
12th August 2008, 21:40
Sam
I do not have your phone number and I need to talk to you. Call me please.

Dakin Engineering
12th August 2008, 22:57
Just talked to your machine..

Dakin Engineering
19th August 2008, 03:44
Here's how I change class to Partial Streamline (this year)
http://xlforum.net/photopost/data/500/medium/PS_fairing_right.jpg

Dakin Engineering
23rd August 2008, 21:13
Got the 1200 set back from NRHS yesterday.

Started at noon, fired up at 2pm.
A personal best for an 883 / 1200 conversion.

Sam
#6062

Dakin Engineering
23rd August 2008, 23:11
First temp cycle; no leaks, no knocks.

Sweet.

Sam

jmr1283
23rd August 2008, 23:19
good luck.

ol38y
26th August 2008, 18:26
Good Luck Sam...:clap:clap

They say the salt is excellent. :banana

Larry

Dakin Engineering
26th August 2008, 23:12
Thanks Larry,
Daily I'm looking at the bike, asking myself "what more can I do?"
A couple more heat cycles and a new oil filter is all I can up with.

Sam
#6062

rottenralph
27th August 2008, 03:31
Did you get the FI working yet?

Dakin Engineering
27th August 2008, 13:54
RR,
Last I checked, MicroSquirt was still out of stock. That was a couple weeks ago. Even if I could get one, I don't have enough time to get familiar with it before WoS.
I'll leave some power on the table running the Mikuni, but I won't need the last 20 HP until I get closer to 200.

Sam
#6062

jmr1283
27th August 2008, 23:49
good luck sam.

Dakin Engineering
2nd September 2008, 17:16
Had another great Labor Day weekend thanks to ABATE of Kansas.
Entered the bike show and won the Special Interest class.
Got a $10 donation from a HD hillclimber and $50 more from Red when I got home.
http://xlforum.net/photopost/data/500/medium/Perry_trophy_2.jpg

Sam
#6062

jmr1283
3rd September 2008, 01:06
well nice job! glad u pulled out a win. congrats

Dakin Engineering
3rd September 2008, 01:08
Spent $30 of donations.
Had a vendor at the rally do these
http://xlforum.net/photopost/data/500/medium/numbers.jpg

isiahstites
3rd September 2008, 02:33
Sam the bike looks good..........two weeks to go!!

See you there!

Scott

Dakin Engineering
6th September 2008, 23:09
This is the same link as on the sound bite thread.
Now I have to do it again for the 1200 set.


http://media.putfile.com/Turbo-883


Sam
#6062

rottenralph
7th September 2008, 01:15
Sam, that is an interesting sound bite. I here the whine/buzz of a turbo in the sound. I sure hope mine sounds as great as your bike. Good luck at the races.

Dakin Engineering
13th September 2008, 22:36
I can't think of another thing to do to the bike but load her up.
Crew & transport are due in a couple hours.
The punchlist is punched, the I's and T's dotted and crossed. (yeah, right!)

Westbound at dawn, (who am I kidding)
Sam
#6062

Flamin883
13th September 2008, 23:09
GOOD LUCK AND GOD SPEED SAM.
I gotta ask the burnin question How fast are you gonna go this time?

rottenralph
13th September 2008, 23:21
Good luck. Keep us informed.

Dakin Engineering
14th September 2008, 13:56
Ran the calc again; 23/35 @ 6200 = 172

Redline should be closer to 7k
We'll see....

Sam
#6062

isiahstites
20th September 2008, 19:55
Last I saw of Sam was yesterday at around 4 pm and we said are good byes. He after having a few minor issues qualified on the 102 mph record with a speed of 113 mph, his best pass of the week! He had a return run this morning and I have not heard yet how that went. When I do I will update.........

Scott

isiahstites
22nd September 2008, 03:23
It looks like Sam set a record!!:banadanc:banana:clap

Here is the info from the USFRA website:
6062
SAM DAKIN
APS-PBF 1350CC
101.078

Screw Loose Dan
23rd September 2008, 16:21
Congrats!! Way to go Sam!!

Dakin Engineering
24th September 2008, 06:33
What can I say?
I am elated that I was able to pull a rabbit out of the hat.
I am extremely fustrated at my PPPP.

My Thank YOU's are beyond counting.
This record would not have happened without a scratch crew and the donations from the XLForum. No BS.

100's if not 1000's of pictures were taken of my bike. Almost all had XLForum. net in the pic. Bert, between me and Scott and the announcer at the track, every person there knew of the XLForum.

The bloody details;
I had to run 2 miles at 100 mph to find out my fuel pump didn't have the guts to keep up.
Bad news; the timing starts at the 2 mile marker.
For three days we asked questions, opinions, read palms, tossed bones and tried every thing that we hoped would let the genie out of the bottle. Managed to get a qualifier on a record I thought to be a snooze. And ran out of gas on the return run.

I knew I could set a record in a virgin class and with the last pass of the event, I did it. I'm not pleased, but I owed to my crew and every person that sent a buck.


1350 cc APS/PBF now has a record.
101 something. <sigh>

It's not called the Great White Dyno for nothing.

Sam
#6062

Rchop
24th September 2008, 18:23
don't worry about the speed your first time out. It takes time to work the bugs out and really get the bike up to it's potential. My first meet at El Mirage, I ran 98mph. I got it up to 122 at Bonneville last year and beat the existing 119 record...I thought it was gonna be a "snooze" too, but I fought pretty hard to bring home the 120 record!
This year I had a top speed of 135 with a new 132.4 record, so you can see, I'm still on the learning curve with this old 1970 50hp motor:D

I hope to run as successfully as you with my new Buell based 750cc APS/PBG next year. With existing records at Maxton at 112mph and the Bonneville record still open, I will be happy just to finish a complete run first time out.
You will only go faster...good luck:clap

Randy

NRHS Sales
24th September 2008, 18:29
Sam,
Next year take a few days off extra ahead of time and stop by my shop. We will dyno it and get all the bugs worked out before you get to the salt. I cannot tell you what an advantage it is to do this before you go to the salt.

Dakin Engineering
24th September 2008, 19:01
Thanks Dan, we'll work on that schedule thing.

The seat dyno felt great Friday morning. Rolled her on in 3rd and she was singing a fine tune around 5000 rpm. Shifted to 4th and grabbed a big handful of throttle. Boost was prolly in the 12-15 pound range for about a half a second. The coupler at the turbo/plenum joint blew off.... Just had to jam it back in place and tighten the living S^#% out of the clamp.

Come to the Salt, and you will have a BSEG just like this;

http://xlforum.net/photopost/data/500/medium/6061.jpg

ol38y
25th September 2008, 01:49
Congrats Sam. Got a record and brought everything home in one piece. What could be better...

Larry

Dakin Engineering
25th September 2008, 03:50
Thanks Larry.
Better?
Having the upper half of the rpm band available after 2 miles. <sigh>

Chassis testing was the main goal. Mission accomplished. Rides like a Lincoln Continental.

We're going back next year with Natasha's 88" motor and a few more tricks......

The Graybeards are working on a team shirt and memberships and such. I'll let you know what/when.

Me? I'm going to the shop. Got a bike to work on.

Sam
#6061/6062

Dakin Engineering
26th September 2008, 00:51
Bonneville 08 Day 0

Pit setup and tech inspection.

We arrived mid morning and found a pit location with a view of the course. Laid out the tarp and hoisted the shade loaned to me by Daryl K. I have tried beating tent stakes into the Salt before, don't work well. Tried 1/4" eyelag bolts this time. Carl persisted until they worked.
Celeste was rolled out of the truck and secured to my latest front wheel carrier. We used it to go to tech and back before giving it up in favor of the pickup bed.
Ah tech; the OMG WTF if she don't pass agony. First inspector eyeballed the intake runner and asked me to sit in the operating postion. Then he reminded me that the runner could get as high as 250 degrees with full boost. YIKES! He'd let me pass, but get some heat wrap on it. Gotcha, thanx.
Then the "extra set of footpegs" quibble. Rule book states only one set of footpegs can be used. I pointed out they were knee rests. They said foot pegs. I pointed out the controls were on the footpegs by the axle, these are knee rests. It was solved by demonstrating my riding stance on the wrong pegs. Picture the money and the football, salaaming. Case closed.
Having lost that one, he pointed out I did not have the lines secured on the head breathers. K, safety wire, no prob.
Helmet, leathers, gloves and boots were all checked off. Fire bottles, CB radio, all pass.

Paid the entry fee, filled out forms, and gawked the rest of the day. Seldom Seen Slim, wife Nancy, and a helper known as Todd were two pits away. A fantastic supercharged SBC powered Studebaker between us.
The other side was a pair of the last MG's ever made running Roush 351's. Fast company.

Sam
#6061/6062

NRHS Sales
26th September 2008, 18:44
sam,
An 88". Why do you keep picking engine sizes that are too big for one class and too small for the next one up? You should look at ways to turn that 88" engine into a 1350 if you want to be competitive. It an usually be easily done with a set of custom Axtell cylinders and 3.700 bore pistons.

snowman
26th September 2008, 19:31
Good luck and ride it safe, Sam!!!
:banana:banana:banana

Dakin Engineering
26th September 2008, 23:30
I was a latecomer to LSR. Local drag racing was the basis of the bug.
Natasha was built by the square formula, balanced and blueprinted before.
Celeste was a test motor that may reappear in a "refined" frame in a couple of years.

Now I have a chassis I am happy with. Got the motor, even if it is undersized for the class. The rest is development and seat time. ;)

Sam
#6061/6062

Dakin Engineering
26th September 2008, 23:42
Bonneville 08 Day 1


The tech hurdle being passed; now we had an Entry.

Now to introduce the Crew;

Crew Chief Bill Collier, Lt Col. US Army (ret)
Crewman Robert Hill CW03 US Army
Crewman Carl Raithel, Esq.

This "scratch crew" was born at the Kansas City Run in June. I said I was goin to the Salt, Bill said he'd like to be there. Opa and I had talked about it on his way home from KC Run 07. Carl was riding shotgun for Bill. Fine men of integrity, everyone.

We arrived at the Salt in time to load the bike before the drivers meeting. (The lads went to the task and with just a couple iterations had the load/unload down to a smooth operation.) We ambled over to the meeting; old hat to me, but I knew the crew was just getting the Salt hook deeper.
Nothing new; Go Fast, Drive Safe. After the meeting was the sighting run. You can drive the crew vehicle down the course and look for the smoothest line. Salt conditions were as good as I have ever seen. White concrete.

A bit of back ground on Celeste; I had purposely built her to run in several configurations. Fuel or gas classes, with and without fairing. To minimize the gremlins, first off was a gas class without the fairing. There was an existing record of 104.97mph. Seemed easy enough.......

As I said to any who asked that week, "It's the first time I've had her in 2nd gear since I built her." Paging Mr Murphy!!!!
First pass was spongy, but smooth. Slight burble, but I wasn't looking for speed, just a handling run. 97+ mph.

Back to the pits; swap the 40 tooth for the 35, take out a link. Notice I had left the shocks on soft. Whups. Crank over to hard. (lessons in geometry will be taught soon). Plug check was good, thru in a fresh set, as gapped by the Crew Chief's Gerber knife. (found the gapper at the end of the meet; the Gerber was right, too.) Back in line.

part 2 follows

Dakin Engineering
27th September 2008, 00:10
The Salt was a busy place. Much time standing in line. We had it easy for the first pass, just a half hour or so. There was talk of closing the course on schedule, but ~50 competition vehicles ready to go kept it open til sunset.

About 5:30 local, we got the second pass. Remember Murphy? Yup. Chain adjustment don't mean spit until it has been run. Between the sprocket change and the shock adjustment and a loose chain, well.... Had to shut off after a mile; the chain was slapping the chainguard mount. Crax.

Back to the pits. Add 3/4 turn to the adjusters. Nice tension. Caught up with Scott Stites, a bud from XLForum. He runs a Buell. And the Guzzi team; I'm for anybody with pushrods. Close the pits and return to Wendover for the evening. Guzzi team next door at the Best Western...

Sam
#6061/6062

Dakin Engineering
27th September 2008, 04:07
Here's my bud, Scott. I think he's happy with his plug reading.
http://xlforum.net/photopost/data/500/medium/scott.jpg

Dakin Engineering
27th September 2008, 04:10
Imagine; there is nothing but horizon and you.
http://xlforum.net/photopost/data/500/medium/side_view_a.jpg

Dakin Engineering
28th September 2008, 00:37
Bonneville 08 Day 2


Seems I forgot the gremlin bell..

The morning run confirmed the chain was right. Backed off the timing a full notch. WTF is the burble at half throttle 2 miles out? Been there from the first pass. Slogged thru to another non-qualifier. This cannot be right.

Occam's razor ; re-do the timing, full opposite. Try again.Grrr... No improvement. But the boys had fun with the binoculars. Asked every air breathing humaniod their opinion. "You outta gas." Grrr...

Folded the tent and went back to Wendover for the night.

Need to mention Greg from St Louis; best pics of the bike so far. Newb to the Salt, hook set.

Sam
#6061/6062

BWP 5p
28th September 2008, 04:35
:clap:clap:clap:clap:clap:clap:clap:clap:clap:clap :clap:clap:clap:clap

55chevr
28th September 2008, 15:58
Sam,
We stopped at NRHS on the way to Bonneville. Dan (NRHS) ran 6 dyno pulls on my bike this year. We made a number of jet changes both main and powerjet before he was satisfied. The shop is at 5000 ft altitude and Bonneville is 4200 ft usually corrected to about 5000 ft per ERC Trailer. The bike went 149 mph right off the trailer matching it's best speed at Maxton which has an altitude of 210 ft. As you can see it was right on the money. We made only one sprocket change to get the 151 mph that set the record.
Joe

Dakin Engineering
29th September 2008, 00:22
aving spent the evening comparing notes, bouncing ideas, and a whole bunch of headscratchin the the best guess was a plugged main jet.

Bright and early, I roused the troops for another day. I snagged a coffee filter from the Chief's supply and we went to the Salt. We arrived in time for the record return runs. I love the sound of any motor at full song. Anyway, that was the background as the day began in the pits.

Cut open a drink bottle and filtered the float bowl drain. Specks, but nothing like 185. Rats. Pull the jet, clean. Pull the carb, remove the bowl and see minor varnish. I need time to think about the next step. Some folks from Liverpool stopped by to chat while I polished the inside of the bowl, occasionally stopping our conversation to watch and listen as another high speed screamer went downcourse.

Verified the fuel pump ran, filled half a bottle in 10 seconds. About a liter. No trash. (This becomes important later). Put the carb back together, installed and back to the waiting line. Crew reported good breakfast food at the vendor. I got a belly full of butterflies.

I was a bit tense when Monte did his dance. Don't think I dumped the clutch, but she danced. 3 to the right, then 3 to the left. I was sure I had got his toes as I rolled up in first. Not gonna chance more sidewise ridin, clicked third before I rolled her on. (The 3500 rpm barrier weren't there in the first mile.) Wound her up to song, about 6000 r's. OMG, sweet. Nothing but pure. Grinnin like a fool, I slapped 4th and a full twist. This lasted for about half a second. The waste gate couldn't keep up with the boost and the plenum/ turbo joint popped off. Repeat explecitives at full volume in a helmet.

I'm halfway to the return road when I give up riding a coaster.
Seems I had forgot to brief the crew in a non-emergency recovery. I made the point clear, get me and my scoot off the course. And gimme a screwdriver, get us back in line.

I knew this was the last shot at breaking the record that I set out for. Humbled again by the Great White Dyno. It took 3 hours (or years, depending on your perpective) to get back to the starting line. I tried to apologize to Monte. He replied I had recieved a standing ovation. (seeing as they was standing to start with, well) Last shot, make it count.


Sitting in the sun does accelerate the thinkin process. Get over the denial phase, accept the fuel pump is limp. Sneak up on the 2, and pray the fuel lasts. 115 quarter, 113 exit at the 3. Qualifier by 8 mph. <sigh>

3 days of "what if" got us to impound. Or Parc fermee, as my new European frends tell me.My nerves are at near frazzle, I submit to a cold brew. Or 6. Guzzi boys are right neighborly.

One more pass......

Sam

ol38y
29th September 2008, 15:28
Here's my bud, Scott. I think he's happy with his plug reading.
http://xlforum.net/photopost/data/500/medium/scott.jpg

Naw, he always has that look!!! :laugh Or, maybe it's just being on the salt.

Dakin Engineering
30th September 2008, 00:26
Day 4

Per the rules, the bike stayed in impound over night. A plug check told me all was well (as could be). No worries, just do that pass one more time. Once again, the crew loads up and follow the caravan to the starting line. Unload, pull on the leathers, and wait my turn.

Push to the starting line, the squires do the final zippers, gloves, and helmet. Monte gets word that the track is clear and does his dance. Seems to be a few feet further the the left as he waves me onward. Smart fella.

Relax, I try to tell myself. Ha! First, second, third, all smooth. Into fourth and take it easy, got another 2 and half miles to go. Sputtered and died. Out of gas. Remember the fuel pump test? Dumped a liter or more out. Dammit.

No time to waste kicking my own ass; gotta get back to tech for a class change. That little 104.97 record had kicked my butt all week. So be it. Time is running out. Tom does a quick check of the hardware and gigs me for the fuel shutoff. Back to the pits to install the Pingel. Dump in a gallon of fuel. Get Tom's blessing, pay the fee, back in line.

Ran the same routine, qualifier pass of 97. Back to impound, checked off by the man. Back in line. Waved Fireman Jim ahead of me. He was finishing the second half of his 200 MPH Club. Last record pass of the event. Once again, I ask my angels for a bit of tailwind. Let her roll. At the two mile mark, rolled her on slow. Same damn burble; just hang in there. 3 mile marker in sight, squeeze a bit harder and thru the traps at 104 for a 101 average. Kept Tom's Budwieser full as the final tech and engine measurements were completed. Paperwork done and it's in the books; 1350cc APS/PBF now has a record.

It would not have been possible without the Graybeards.

For you fans of Top Gear, the crew was out there filming for a future episode. Got to shake hands with Richard and Jeremy. Understood Andy Green was to be there to run the Mormon Meteor the next day.

Sam
#6061/6062

Dakin Engineering
30th September 2008, 01:21
Why is this pic different? I ran 6061 (4 full passes, 3 turnouts) without success.
6062 made only two passes and set a record. The pic is from impound while the record was being certified. Damn hard pic to get, it was.

More importantly, it was the donations of the XLForum that made it possible. Good on ya'll. Thanks.
http://xlforum.net/photopost/data/500/medium/6062.jpg

Dakin Engineering
1st October 2008, 03:39
my goal; Warner Riley's 1973 World's Fastest Sportster @ 206 mph
http://xlforum.net/photopost/data/500/medium/riley_206.jpg

Flamin883
2nd October 2008, 16:48
Is it just me, or does Riley's bike have quite a bit of rake?

Dakin Engineering
2nd October 2008, 20:18
Kyle,
The rake is a holdover from the "good old days" when the slop, er, "less than desirable handling characteristics" was so bad. Kicking out the front changed the angle of attack, making tank slappers less frequent.
In Riley's case, he musta been using the front wheel as a sail. With that HP and wheelbase, it had to be a unicycle at speed, IMHO.

Sam

Flamin883
2nd October 2008, 20:22
what kinda HP did he have to have to break 200 no windshield no fairing Hell he aint even got a fender. and in the pic he's not even layed out

NRHS Sales
2nd October 2008, 20:24
I would guess at least 250. The bike was run on about 95% nitro methane.

decman
2nd October 2008, 20:51
Well a more positive trail will make it want to only go straight.
I guess that is a very good thing for the salt when that is what you need to do.

Remember if you rake out the neck without adjusting the trees for a normal
trail then the trail will be out there. His trail looks like about 12" or so.
Normal is 4-5"

Dec
Who just spent some $$ fixing the trail on his 45 degree raked chopper.

Is it just me, or does Riley's bike have quite a bit of rake?

Dakin Engineering
3rd October 2008, 01:33
They were bolder men, on olden days.

Sam

55chevr
5th October 2008, 19:58
Sam,
What waste gate are you using?
Joe

Dakin Engineering
6th October 2008, 01:36
Joe,
It's built in. Warner-Ishi RHB-52. Set for 8 psi.
But it can be ~messed~ with.

Sam

Flamin883
6th October 2008, 15:19
Well a more positive trail will make it want to only go straight.
I guess that is a very good thing for the salt when that is what you need to do.

Remember if you rake out the neck without adjusting the trees for a normal
trail then the trail will be out there. His trail looks like about 12" or so.
Normal is 4-5"

Dec
Who just spent some $$ fixing the trail on his 45 degree raked chopper.

So simplistically thinking ( that's usually the best I do) It's not really the rake that matters It's the trail that determins the bikes handling characteristics?
this always kinda confused me but I think I'm startin to see