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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #201  
Old 1 Week Ago
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Ferrous Head Ferrous Head is offline
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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.
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  #202  
Old 1 Week Ago
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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...
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  #203  
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Iron Mike Iron Mike is offline
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Quote:
Originally Posted by mickey t View Post
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
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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