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Members Birthdays
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23rd February 2021
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Flat Track Champion
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Join Date: Aug 2017
Posts: 611 Sportster/Buell Model: xls roadster Sportster/Buell Year: 1982 Other Motorcycle Model: Oh yeah!
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Quote:
Originally Posted by Ferrous Head
Isn't there a few yards left near the start line as a nod to "Olden Times" ?
Was when I was there.
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I'll have a look when I'm over this year. 
__________________
The Devil is in the detail.
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23rd February 2021
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XL FORUM TEAM MEMBER
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Join Date: May 2017
Location: Lubersac/France
Posts: 1,799 Sportster/Buell Model: 1200c Sportster/Buell Year: 2005
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Re I.O.M., all tarmac. Maybe your thinking of the Brickyard in the States?
__________________
"Procrastination is the thief of time"................90's Harley ad.
"Don't wait for your ship to come in, swim out and meet the bloody thing".................Barry Sheene.
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23rd February 2021
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Master Custom Bike Builder
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Join Date: Jan 2008
Location: IN MY SHED IN SUFFOLK
Posts: 3,260 Sportster/Buell Model: XLH 1000 Sportster/Buell Year: 1984 Sportster/Buell Model #2: XL 1200 Sportster/Buell Year #2: 1993 Other Motorcycle Model: BMW R80ST Other Motorcycle Year: 1984
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Will they be like Chinese food, after 30 mins you need another one. 
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Barry the Cantankerous old git.
Blue belt in Serious tea drinking. :)
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23rd February 2021
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Senior Custom Bike Builder
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Join Date: Jan 2011
Location: Paradise
Posts: 2,845 Sportster/Buell Model: xlch Sportster/Buell Year: 1977 Other Motorcycle Model: BMW K-1200/GT Other Motorcycle Year: 2004
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Quote:
Originally Posted by Ferrous Head
Isn't there a few yards left near the start line as a nod to "Olden Times" ?
Was when I was there.
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3 foot wide section at START/FINISH that extends to pits on Gasoline Alley
It is now called the "YARD of BRICKS"
__________________
If loud pipes save lives....imagine what learning to ride will do for you.
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26th February 2021
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Chief Harley Engineer
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Join Date: Feb 2015
Posts: 510 Sportster/Buell Model: custom Sportster/Buell Year: na
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wow I just finished reading this thread, feel like I was studying for a college class, I'm considering the change from a CV to a S&S knockoff on a Buell, so its carb only right? any info on acquiring manifolds and such??
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26th February 2021
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Flat Track Champion
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Join Date: Aug 2017
Posts: 611 Sportster/Buell Model: xls roadster Sportster/Buell Year: 1982 Other Motorcycle Model: Oh yeah!
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Yup, just the carb. No air filter, no manifold. I use an S&S filter and housing with my Keihin. Good piece of kit..
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26th February 2021
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Blind Owl
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Join Date: Jun 2009
Location: Sunshine Coast
Posts: 6,471 Sportster/Buell Model: XLB, XLCH, Sporton Sportster/Buell Year: 1962 Sportster/Buell Model #2: XLCH Sportster/Buell Year #2: 1966 Other Motorcycle Model: XLCH (Another one) Other Motorcycle Year: 1966
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<y original purpose was to see if they performed well enough to act as a diagnostic tool.
And they do. No doubt about it.
So with one of them and a compression gauge in half an hour you can be absolutely sure your engine problem is in the ignition system somewhere.
That's a bit over a hundred dollars worth of tools to help you eliminate 2/3rds of the problem areas on an engine that's not running right.
I think these flow somewhere around 175 CFM ? So, they'll work for engines up to 85 inches at least. Maybe more, I would have to check the numbers.
__________________
"I know only too well the evil that I propose. But my inclinations get the better of me."
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26th February 2021
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Senior Custom Bike Builder
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Join Date: Jan 2011
Location: Paradise
Posts: 2,845 Sportster/Buell Model: xlch Sportster/Buell Year: 1977 Other Motorcycle Model: BMW K-1200/GT Other Motorcycle Year: 2004
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Quote:
Originally Posted by Ferrous Head
<y original purpose was to see if they performed well enough to act as a diagnostic tool.
And they do. No doubt about it.
So with one of them and a compression gauge in half an hour you can be absolutely sure your engine problem is in the ignition system somewhere.
That's a bit over a hundred dollars worth of tools to help you eliminate 2/3rds of the problem areas on an engine that's not running right.
I think these flow somewhere around 175 CFM ? So, they'll work for engines up to 85 inches at least. Maybe more, I would have to check the numbers.
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Just under 150 cfm per 100 H/P...
Now look back at the 427 L-88 Chevy that the Holley 850 Dbl-Pmpr was designed for........just under 600 H/P!!!
Then the Holley Dominator...1150 CFM!!!
Just under 800 H/P |
26th February 2021
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Flat Track Champion
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Join Date: Aug 2017
Posts: 611 Sportster/Buell Model: xls roadster Sportster/Buell Year: 1982 Other Motorcycle Model: Oh yeah!
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Are they rated at the same pressures?
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26th February 2021
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Blind Owl
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Join Date: Jun 2009
Location: Sunshine Coast
Posts: 6,471 Sportster/Buell Model: XLB, XLCH, Sporton Sportster/Buell Year: 1962 Sportster/Buell Model #2: XLCH Sportster/Buell Year #2: 1966 Other Motorcycle Model: XLCH (Another one) Other Motorcycle Year: 1966
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Yeah, they have standardized methods for measuring air flow through carbs.
Mostly people are over carburated. It's rare to find an engine where the carburetor is restricting the engines ability to breathe.
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