What should compression readings be?

[wayne clev.]

Can anyone tell me what the compressions readings should be on a SE 95" build with Andrews N26 cams? Thanks in advance for
any information.   

Wayne

[Herko]

Wayne,
A calc can be done. A few factors needed.
IIRC you have flat tops??
Heads milled any...or CC's known?
HG thickness...030?

[Herko]

But for instance:
Stock heads (based on 85 cc)
Flat top pistons (based on 3 cc valve reliefs)
.030 HG
Deck height at .000
Your AP 26 cam
Sea level. etc.
Calcs to 176psi.

Your factors may differ.
Your results may vary.

[wayne clev.]

Thanks for the reply. It is a standard big bore kit from Harley. Flattop pistons, stock heads & gasket.  I'm about 2000' above sea level.
The build only has 150 miles on it and the ccp is 150 on both jugs.  I would expect this to go up when everything is seated in, wouldn't
you?

Wayne

[Herko]

With the factors above but with a stock HG (using .054) and 2000 ft altitude, calcs to 156 psi.
Looks like you're right in the ball park...and F&R balanced too.
YFMD
YRMV

How's it running so far?

[wayne clev.]

Thanks Herko, and thanks for the cam conversion kit. Everything was there, nothing else to buy.

Wayne

[wayne clev.]

It's also running great with the can map in it now. may have it dynoed later. Again, thanks.

Wayne