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  #1  
Old 27th December 2007
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Default XB vs 883 vs Thunderstorm...all Stage II.

XB vs 883 vs Thunderstorm...all Stage II.

Just trying to get some condensed, Readers Digest comparisons on the pro and cons...performance etc. of these three in a NRHS 1250 conversion.
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Old 28th December 2007
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Default Condensed version

Here is the condensed version:

1. Read tech article in NRHS section on heads. Explains everything.

2. XB/1200R Best head made period. Stock, Stage I, II ect

3. Thunderstorm Used to be best head made. Still a great performer stock, Stage I, II ect.

4. 883 heads Yes, they can be modified, but will fall short of the above with the same modifications

5. TS and XB1200R heads have the same valve sizes. XB/1200R has better port design.
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2002 XL1200S "The Black Beauty" NRHS 1250 kit CI, NRHS Stage 1 TS heads dual plugged, NRHS Hurricane Air Filter, SE 536 cams, Rich Products Thunder header, 42 Mikuni, Daytona Twin Tec ignition w/ Dyna coils. 97.4 HP, 85.5 Torque 1984 XR-1000 S&S Crank/rods w/windage tray, Vision Grinding Cylinders, Arias 11:1 compression pistons, Andrews XR-1000-1 cams, Baisley modified dual plugged heads, Rich Products Thunder header, 38mm Delortos, Daytona Twin Tec ignition w/ Dyna coils. (the never ending project but, got a 66 Barracuda drag car sucking up all the funds and time)
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  #3  
Old 28th December 2007
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I would be curious to see dyno numbers of the three heads, Stage II. I mean people here talk so much about how great a certain head is over another...but if it's only 5% over the next best head....well...

well...just curious.
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Old 28th December 2007
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Check out all the dyno charts at NRHS's website. Should have a pretty good variety for you.

http://www.nrhsperformance.com/dynoroom.shtml
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Old 28th December 2007
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Quote:
Originally Posted by blakjak View Post
Check out all the dyno charts at NRHS's website. Should have a pretty good variety for you.

http://www.nrhsperformance.com/dynoroom.shtml
Thanks...I missed that link....

Anyhow Highest HP was a STD head/Stage III and 82" kit.....140.1 HP, 106.2 ft-lbs TQ

2nd....Thunderstorm Head/Stage III and 82" kit....137.8 HP, 105.9 ft-lbs TQ

I may have missed something, but Thunderstorm heads look pretty damn good and equal to any head out there.

I think I will get a set of Thunderstorm heads and have NRHS work on them or buy some XB heads direct from them....Seems to me you can't loose with ether.
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Old 28th December 2007
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You can bet those are all drag race motors that have 14:1 compression. Which means race gas only. Go with the XB's. Stage whatever depending on what else you plan on doing. Call Dan.
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Old 28th December 2007
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Quote:
Originally Posted by Screwdriver View Post
I would be curious to see dyno numbers of the three heads, Stage II. I mean people here talk so much about how great a certain head is over another...but if it's only 5% over the next best head....well...

well...just curious.
Well, everything else being equal, which one will win the drag race?
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Old 28th December 2007
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Quote:
Originally Posted by Screwdriver View Post
I would be curious to see dyno numbers of the three heads, Stage II. I mean people here talk so much about how great a certain head is over another...but if it's only 5% over the next best head....well...

well...just curious.
I'm pretty sure you're starting to split hairs here dude. What I mean is, you know you want an upgrade. You've looked at everyone else's stuff and have decided what numbers you think will make you happy.

Granted, I don't know what will make you happy but I'm pretty damned sure that a 80's HP/TQ bike will do just about everything you want. Reaching for 100+ HP is not for 90% of the riders out there. If you haven't ridden a 1250 or a sportster with that much power, try and see if you can find someone on here close to you with one or even a decent stage 1 1200. You've got an 883. Even a stage 1 1200 is going to have around 50% more power than your bike.

I use Jessearias as an example sometimes but you need to look in the dyno sticky thread on here and look at what he has done to his. His is a good example of what you can get without going overboard.

I just don't like seeing guys go all out and throwing money away on parts they really don't need when they can get the results they want for less money and work.

IMO - if you have the money, go 88 inches. You'll never be disappointed.
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Old 28th December 2007
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Quote:
Originally Posted by blakjak View Post
I'm pretty sure you're starting to split hairs here dude. What I mean is, you know you want an upgrade. You've looked at everyone else's stuff and have decided what numbers you think will make you happy.

Granted, I don't know what will make you happy but I'm pretty damned sure that a 80's HP/TQ bike will do just about everything you want. Reaching for 100+ HP is not for 90% of the riders out there. If you haven't ridden a 1250 or a sportster with that much power, try and see if you can find someone on here close to you with one or even a decent stage 1 1200. You've got an 883. Even a stage 1 1200 is going to have around 50% more power than your bike.

I use Jessearias as an example sometimes but you need to look in the dyno sticky thread on here and look at what he has done to his. His is a good example of what you can get without going overboard.

I just don't like seeing guys go all out and throwing money away on parts they really don't need when they can get the results they want for less money and work.

IMO - if you have the money, go 88 inches. You'll never be disappointed.
I think you missed the point of my post. I am saying that people are splitting hairs. I am seeing pretty close numbers whether it is a 883 head, Thunderstorm or XB head all Stage II. I read posts where people say throw away your 883 heads and get a XB....Or don't get a Thunderstorm head...get an XB instead. I am just reaffirming my view that using what you have within your budget and not playing in to the flavor of the month will achieve similar results at Stage II.

As for HP,....I have ridden Hayabusa's, My Dad's 06 K1200R, a turbo GSXR1000 and other bikes in the 150+ HP range. So you shouldn't assume that someone would somehow be overwhelmed with 80+ HP.
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Old 28th December 2007
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My bad. I wasn't assuming that you had no idea about this stuff. It's just the last several posts you've made have been concerning basically the same general idea of what head or stage is better.

There's a lot of guys (myself included) who don't know what 80-100 HP feels like. However, I know where to look to find the answers and was just trying to point you in the general direction.

Most of the guys splitting hairs either don't know what they want or how to get there, or they're trying to eek every last bit of HP out of a bike for one reason or another.

Sorry if I offended.
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