The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE FORUM > Sportster Motorcycle Intake and Exhaust > Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Notices

Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust Problems, advice and/or how tos for Sporster and Buell motorcycle carburators, Electronic Fuel Injection (EFI), Air Intake, Fuel and Exhaust.

Active Threads
0 Removing transmission 1973 XLH
Last Post: Beary
Posted On: 2 Minutes Ago
Replies: 15
Views: 696
0 Replace sprocket
Last Post: Mike1nw
Posted On: 3 Minutes Ago
Replies: 7
Views: 312
0 Disassemble tranny HELP
Last Post: Mike1nw
Posted On: 10 Minutes Ago
Replies: 6
Views: 175
0 How Indian Makes 43% More Power than Harley-Davidson
Last Post: Tomcatt
Posted On: 11 Minutes Ago
Replies: 14
Views: 333
0 Engine apart
Last Post: Mike1nw
Posted On: 14 Minutes Ago
Replies: 2
Views: 152
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 23 Minutes Ago
Replies: 22,962
Views: 2,339,536
0 Snippets
Last Post: Crusty
Posted On: 36 Minutes Ago
Replies: 265
Views: 27,801
0 add oil and ride
Last Post: ferretface
Posted On: 38 Minutes Ago
Replies: 3
Views: 151
0 Supertech oil filter cross refetence
Last Post: shanneba
Posted On: 43 Minutes Ago
Replies: 5
Views: 183
0 Full face, Half or skull cap?
Last Post: Eric Von Zipper
Posted On: 49 Minutes Ago
Replies: 516
Views: 101,129
0 1/4 Fairing. Dead Center Cycles
Last Post: Eric Von Zipper
Posted On: 52 Minutes Ago
Replies: 6
Views: 200
0 Cruiser or Sport?
Last Post: Eric Von Zipper
Posted On: 1 Hour Ago
Replies: 10
Views: 291
0 Able to Ride with Parkinson's Disease
Last Post: Eric Von Zipper
Posted On: 1 Hour Ago
Replies: 3
Views: 102
6 Secret photo"s of folkies loft
Last Post: DEEP DIVER
Posted On: 1 Hour Ago
Replies: 1,530
Views: 241,156
0 Help with oil pump drive gear
Last Post: Bryan1976
Posted On: 1 Hour Ago
Replies: 5
Views: 163
0 Official XL Forum Random Image Thread (NO NUDITY!)
Last Post: Graywolf
Posted On: 1 Hour Ago
Replies: 48,564
Views: 7,853,090
0 My Cafe Build...2002 883R
Last Post: Eric Von Zipper
Posted On: 1 Hour Ago
Replies: 10
Views: 1,584
0 Any 3D printer people on the forum?
Last Post: Steve9
Posted On: 2 Hours Ago
Replies: 30
Views: 484
0 WTD: XL1200S SE Ignition module
Last Post: flak monkey
Posted On: 3 Hours Ago
Replies: 6
Views: 275
0 Stock vs. Modified
Last Post: 60Gunner
Posted On: 4 Hours Ago
Replies: 293
Views: 100,692
0 New EU rules?
Last Post: Deimus
Posted On: 4 Hours Ago
Replies: 13
Views: 492
0 1996 XLH sputters and dies when warm?
Last Post: IXL2Relax
Posted On: 10 Hours Ago
Replies: 15
Views: 334
0 2002 883R heads?
Last Post: rocketmangb
Posted On: 11 Hours Ago
Replies: 9
Views: 1,134
0 New sportster in HD Research Survey
Last Post: Crusty
Posted On: 14 Hours Ago
Replies: 47
Views: 2,639
0 So Long
Last Post: XL Ed
Posted On: 15 Hours Ago
Replies: 46
Views: 6,834
5 Is factory Stage 1 worthy?
Last Post: XL1275
Posted On: 17 Hours Ago
Replies: 15
Views: 504
0 Low fuel light
Last Post: Iron Chuck
Posted On: 17 Hours Ago
Replies: 20
Views: 6,302
0 too much oil in primary
Last Post: 73HEAD
Posted On: 17 Hours Ago
Replies: 15
Views: 465
0 '66 XLCH Running Pig Rich
Last Post: Ferrous Head
Posted On: 17 Hours Ago
Replies: 34
Views: 1,748
0 Hello everyone
Last Post: motorfish
Posted On: 17 Hours Ago
Replies: 12
Views: 150
More...
Members Birthdays
irvingjr (72), 909XR (63), Ghost_FL (61), mark R (60), TWISTED (47), spade (45), Drivethis29 (40), dodgetrucken (35)
Reply
 
Share Thread Tools Display Modes
  #11  
Old 3rd November 2019
60Gunner's Avatar
60Gunner 60Gunner is offline
Senior Custom Bike Builder
 
Join Date: Sep 2017
Location: United States
Posts: 2,951
Sportster/Buell Model: 1200/1250C
Sportster/Buell Year: 05
Reputation: 3247009
60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute60Gunner has a reputation beyond repute
Default

Khromewerks had an earlier version of slip on call the AR100. The newer HP Plus is similar to that pic but with a more open baffle in the middle that changes size with what resembles golf balls with holes.


Last edited by 60Gunner; 3rd November 2019 at 18:22..
Reply With Quote
  #12  
Old 4th November 2019
sml1226 sml1226 is offline
Chief Harley Engineer
 
Join Date: Apr 2015
Posts: 570
Sportster/Buell Model: XL1275R
Sportster/Buell Year: 2004
sml1226 has disabled reputation
Default

That level of change is not what I had in mind. The change there kills off the baffle and goes to solid pipe while trying to get the butterfly out. I can’t imagine that helps performance any, though I didn’t see any numbers for the mod.

And yes, the factory exhaust, once uncorked from the emissions compliant mufflers, is very capable if finished properly. Of course, a well designed 2:1 should be capable of equaling it, as shown by the Defender. I don’t think it’s that you can’t make a 2:1 work, rather the designers aren’t pulling it off, whether that be due to aesthetics being paramount, or lack of knowledge in doing so. Pipe builders have pulled a few different mufflers out when the freedom to do anything is taken away and they are restricted to making the space they have to work in perform well.

My curiosity with something like these “muffler“ designs, is whether it would allow for a 2:1 (or even true duals) to perform better than they do without having that perfect blend of lengths and baked in anti reversion elements like header steps, assuming reversion is the issue. Cones and lollipops have numbers associated with them in multiple designs, and they have their places, but both have drawbacks. As mentioned, both sit too close to an end to be ideal.

However, I still am left wondering if something close to “perfect” would be as great with only that butterfly valve omitted, zero other changes. If it has zero effect, great, if not, then any design using those dimensions for a new pipe needs to have an obstruction of some sort to provide a similar effect. Of course, if it does have an effect, the ideal pipe would have different dimensions in order to avoid the use of such an internal device.
Reply With Quote
  #13  
Old 4th November 2019
Maxeffort's Avatar
Maxeffort Maxeffort is offline
Momentary Specialist
 
Join Date: Aug 2016
Posts: 869
Sportster/Buell Model: XL1200
Sportster/Buell Year: 1996
Other Motorcycle Model: ST1100
Other Motorcycle Year: 1999
Reputation: 1451966
Maxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond reputeMaxeffort has a reputation beyond repute
Default

Quote:
Originally Posted by sml1226 View Post
That level of change is not what I had in mind. The change there kills off the baffle and goes to solid pipe while trying to get the butterfly out. I can’t imagine that helps performance any, though I didn’t see any numbers for the mod.
Posted to get a look at Patriot Defender construction at the merge and muffler ...
__________________
“This life’s hard, but it’s harder if you’re stupid”
Reply With Quote
  #14  
Old 5th November 2019
sml1226 sml1226 is offline
Chief Harley Engineer
 
Join Date: Apr 2015
Posts: 570
Sportster/Buell Model: XL1275R
Sportster/Buell Year: 2004
sml1226 has disabled reputation
Default

Quote:
Originally Posted by Maxeffort View Post


Posted to get a look at Patriot Defender construction at the merge and muffler ...
And I'm supposed to know you're posting that for reference... how? Especially when rather than post just a relevant picture, or include any text at all, you throw up a full quote about a mod to the muffler assembly
Reply With Quote
  #15  
Old 7th November 2019
Blackbenny Blackbenny is offline
Biker
 
Join Date: Jul 2013
Posts: 61
Sportster/Buell Model: Iron 883/1250
Sportster/Buell Year: 2015
Sportster/Buell Model #2: 48
Sportster/Buell Year #2: 2016
Reputation: 10
Blackbenny is an unknown quantity at this point
Default

Thrashin supply makes big twin pipes with these. Sadly not for sporties
Reply With Quote
  #16  
Old 8th November 2019
sml1226 sml1226 is offline
Chief Harley Engineer
 
Join Date: Apr 2015
Posts: 570
Sportster/Buell Model: XL1275R
Sportster/Buell Year: 2004
sml1226 has disabled reputation
Default

Huh, those are oddball pipes. Looks like there's one at the heads and one after the collector... then they stuff more A/R stuff in the muffler. Wonder how that thing actually runs.

The design of their Sportster pipe looks like it would be fairly easy to stuff one in there if you wanted to though. There's a lot of pipe between that collector and muffler
Reply With Quote
  #17  
Old 8th November 2019
Blackbenny Blackbenny is offline
Biker
 
Join Date: Jul 2013
Posts: 61
Sportster/Buell Model: Iron 883/1250
Sportster/Buell Year: 2015
Sportster/Buell Model #2: 48
Sportster/Buell Year #2: 2016
Reputation: 10
Blackbenny is an unknown quantity at this point
Default

Quote:
Originally Posted by sml1226 View Post
Huh, those are oddball pipes. Looks like there's one at the heads and one after the collector... then they stuff more A/R stuff in the muffler. Wonder how that thing actually runs.

The design of their Sportster pipe looks like it would be fairly easy to stuff one in there if you wanted to though. There's a lot of pipe between that collector and muffler
I’ve thought about it. I’ve had that pipe for 2 years now and low end feels slow. Bat outa hell at 3000 though. I’ve looked at lsr racing as well. Not sure if I want to cannibalise my pipe. Wish someone like hammer would make one that looks good is up high and performs like the defender.
Reply With Quote
  #18  
Old 8th November 2019
SLW210's Avatar
SLW210 SLW210 is offline
Chief Harley Engineer
 
Join Date: Jun 2017
Location: Near Ft. Myers
Posts: 570
Sportster/Buell Model: 1200C
Sportster/Buell Year: 2009
Sportster/Buell Model #2: FXLR Low Rider
Sportster/Buell Year #2: 2019
Reputation: 951988
SLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond repute
Default

Quote:
Originally Posted by Blackbenny View Post
Thrashin supply makes big twin pipes with these. Sadly not for sporties
https://www.thrashinsupply.com/collections/exhaust

They do make Sporty pipes (mids only), I wonder if they plan an A/R version in the future?

I like to see a Dyno chart on the M8 one.

I emailed them, I'll post back if the reply.
Reply With Quote
  #19  
Old 8th November 2019
Blackbenny Blackbenny is offline
Biker
 
Join Date: Jul 2013
Posts: 61
Sportster/Buell Model: Iron 883/1250
Sportster/Buell Year: 2015
Sportster/Buell Model #2: 48
Sportster/Buell Year #2: 2016
Reputation: 10
Blackbenny is an unknown quantity at this point
Default

Quote:
Originally Posted by SLW210 View Post
https://www.thrashinsupply.com/collections/exhaust

They do make Sporty pipes (mids only), I wonder if they plan an A/R version in the future?

I like to see a Dyno chart on the M8 one.

I emailed them, I'll post back if the reply.
I’m pretty happy with mine I’d like to get it on a dyno and see how it works with my hammer stuff
Reply With Quote
  #20  
Old 15th November 2019
SLW210's Avatar
SLW210 SLW210 is offline
Chief Harley Engineer
 
Join Date: Jun 2017
Location: Near Ft. Myers
Posts: 570
Sportster/Buell Model: 1200C
Sportster/Buell Year: 2009
Sportster/Buell Model #2: FXLR Low Rider
Sportster/Buell Year #2: 2019
Reputation: 951988
SLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond reputeSLW210 has a reputation beyond repute
Default

No plans for an AR for the Sporty.

The only Dyno charts for the M8 and other AR are pretty much well modified, not much way to tell what just the pipes are doing.
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT +1. The time now is 16:24.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC