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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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  #1551  
Old 2 Weeks Ago
Turbo Sporty 48 Turbo Sporty 48 is offline
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Join Date: Sep 2010
Posts: 3,330
Sportster/Buell Model: XL1200X Turbo 48
Sportster/Buell Year: 2011
Sportster/Buell Model #2: XL1200 Roadster
Sportster/Buell Year #2: 2008
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Very sexy flow man.
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  #1552  
Old 2 Weeks Ago
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MatHormell MatHormell is offline
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Posts: 1,261
Sportster/Buell Model: XL883R
Sportster/Buell Year: 2002
Sportster/Buell Model #2: Buell XB12R
Sportster/Buell Year #2: 2009
Other Motorcycle Model: Yamaha
Other Motorcycle Year: 95
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Quote:
Originally Posted by jkinkade View Post
Wow , thank's Mat that looks like it has improved atomisation.
what flow bench did you use to get that?
thank's again & good luck.
Just Data I have found, This has been studied extensively in the automotive world, pop open any factory air box now days and you will find a most likely now plastic screen that looks just like this right before the Map sensors. Been doing a bunch of research on Intake design and Helmholtz resonator theory, some very interesting stuff. Got alot of plans on a custom intake set up when I convert to FI, working out all the details but have a solid plan built. With a well tuned intake track, studies have shown up to 7 or 8 psi boost in VE at the specific tuned RPM, by taking advantage of the Pulse wave created from the intake valve shutting, and timing it to return as the the low pressure is created when the intake valve reopens, forcing air in above achievable levels with a NA motor.
Whole bunch of math involved which I have a couple guys helping with. Idea will be to have the tuned intake length set up to take advantage of the 4th pulse wave and time its return based on intake track length and diameter to come on at around 6800-7800 rpms, if done correctly it in theory can be like adding a supercharger for about 1-2000 RPMS at the specific rpm the wave is tuned to work at. Very interesting stuff and has been taken advantage of in all Naturally aspirated racing platforms. LOTS of ideas and stuff in the works!
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  #1553  
Old 2 Weeks Ago
jkinkade jkinkade is offline
Chief Harley Engineer
 
Join Date: Jan 2016
Location: on the Australian east coast
Posts: 536
Sportster/Buell Model: XLH 1200 2003
Sportster/Buell Year: 2003
Reputation: 84302
jkinkade has much to be proud ofjkinkade has much to be proud ofjkinkade has much to be proud ofjkinkade has much to be proud ofjkinkade has much to be proud ofjkinkade has much to be proud ofjkinkade has much to be proud ofjkinkade has much to be proud ofjkinkade has much to be proud ofjkinkade has much to be proud ofjkinkade has much to be proud of
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Quote:
Originally Posted by MatHormell View Post
Just Data I have found, This has been studied extensively in the automotive world, pop open any factory air box now days and you will find a most likely now plastic screen that looks just like this right before the Map sensors. Been doing a bunch of research on Intake design and Helmholtz resonator theory, some very interesting stuff. Got alot of plans on a custom intake set up when I convert to FI, working out all the details but have a solid plan built. With a well tuned intake track, studies have shown up to 7 or 8 psi boost in VE at the specific tuned RPM, by taking advantage of the Pulse wave created from the intake valve shutting, and timing it to return as the the low pressure is created when the intake valve reopens, forcing air in above achievable levels with a NA motor.
Whole bunch of math involved which I have a couple guys helping with. Idea will be to have the tuned intake length set up to take advantage of the 4th pulse wave and time its return based on intake track length and diameter to come on at around 6800-7800 rpms, if done correctly it in theory can be like adding a supercharger for about 1-2000 RPMS at the specific rpm the wave is tuned to work at. Very interesting stuff and has been taken advantage of in all Naturally aspirated racing platforms. LOTS of ideas and stuff in the works!
Good stuff Mat, so it stop's turbulance .
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  #1554  
Old 2 Weeks Ago
MatHormell's Avatar
MatHormell MatHormell is offline
Senior Chief Master Mechanic 1st Class
 
Join Date: Jul 2015
Location: Merica!Fock YA!
Posts: 1,261
Sportster/Buell Model: XL883R
Sportster/Buell Year: 2002
Sportster/Buell Model #2: Buell XB12R
Sportster/Buell Year #2: 2009
Other Motorcycle Model: Yamaha
Other Motorcycle Year: 95
Reputation: 958932
MatHormell has a reputation beyond reputeMatHormell has a reputation beyond reputeMatHormell has a reputation beyond reputeMatHormell has a reputation beyond reputeMatHormell has a reputation beyond reputeMatHormell has a reputation beyond reputeMatHormell has a reputation beyond reputeMatHormell has a reputation beyond reputeMatHormell has a reputation beyond reputeMatHormell has a reputation beyond reputeMatHormell has a reputation beyond repute
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Originally Posted by jkinkade View Post
Good stuff Mat, so it stop's turbulance .
The screen yes, it's very easily removed so if I have a major drop in MPH I'll pull it out and run again

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  #1555  
Old 2 Weeks Ago
jkinkade jkinkade is offline
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Sportster/Buell Model: XLH 1200 2003
Sportster/Buell Year: 2003
Reputation: 84302
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hope all goes good for the last race of the year!!
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