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1 Week Ago
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XL FORUM TEAM MEMBER
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Join Date: Jun 2009
Location: Sunshine Coast
Posts: 4,718 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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Sorry, corrected cranking pressure.
There are a lot of ways to specify how much pressure your engine makes - static, dynamic, effective , corrected.
Most guys just give a nominal static figure which is based on the physical dimensions of the engine. But there are a lot of variables that determine what you finally end up with when the engine is turning over and even more when it's running.
I do a base line measurement using the same procedures every time so I can "estimate" what's happening or happened inside the engine in between rebuilds.
A LOT if Ironhead owners change the cams and they can have a dramatic effect on compression achieved. Generally, they shouldn't.
Funnily enough HD got the cam design pretty well right from the start. Guys want to drop in a set of cams to "go faster" and it so often leads to disappointment.
__________________
"I know only too well the evil that I propose. But my inclinations get the better of me."
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1 Week Ago
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Chief of Security
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Join Date: Sep 2017
Location: United States
Posts: 2,326 Sportster/Buell Model: 1200/1250C Sportster/Buell Year: 05
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Often times that's the case. Giving up power somewhere to gain it elsewhere. There are exceptions tho as I mentioned.
Not sure about in your world...
__________________
05 1200/1250C/Hammer 570 Cams/E1 clutch kit +15% spring
TC88A Gunner's V00D00 map/DCPR7E/Taylor Pro 8mm
S&S Premium Lifters/KhromeWerks HP Plus 3" slip ons
HSR42 25 pilot 2 turns Y8 needle jet 97 needle 2nd groove 170 main
Dragtron II AC K&N filter/VR1 20W50/Spectro 85wt Primary Oil
Max torque 87.7@4400rpm/max hp 86.8@5600rpm
Last edited by 60Gunner; 1 Week Ago at 23:14..
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1 Week Ago
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Senior Chief Harley Engineer 1st Class
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Join Date: Dec 2014
Location: Phoenix
Posts: 1,309 Sportster/Buell Model: xlch Sportster/Buell Year: 1964 Sportster/Buell Model #2: XLCH IR EFI Sportster/Buell Year #2: 1971 Other Motorcycle Model: BMW K1200RS Other Motorcycle Year: 2001
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Quote:
Originally Posted by mickey t
I got it kicked over 4 times in a row...twice last night twice this am...changed my starting procedure...key off start/choke up 2prime kicks..then key on and twist throttle a tiny bit n she kicked over on the 2nd kick each time...
Sent from my SM-J260A using Tapatalk
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What a concept...
Get it warmed up proper when you get your clutch fixed and then set your idle speed. Sounds like your getting it now. |
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