not really EFI-related, regarding compression

[H. J. Zivnak]

-----Original Message-----
From: Barrett Flowers <vette at disknet.com>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Saturday, June 27, 1998 8:55 AM
Subject: Re: not really EFI-related, regarding compression


>That will come in handy, thanks. Just one question about it though,
>where/how do you plug in the cylinder head gasket thickness, such as
>.039 in my case? Add it to the stroke?
>Thanks.


The info that Ray gave you is essentially correct, however, it looks like
you missed a
point. It may help to state it another way.

Compression ratio is defined as the ratio between the Total Volume(Cylinder
Volume plus Clearance Volume) above the piston at Bottom Dead Center and the
Clearance Volume above the piston at Top Dead Center. The head gasket volume
is above the piston at all times(hopefully) and, therefore, is part of the
Clearance Volume not the stroke.

HTH,

Joe
When you have a hammer in your hand, and it's your only tool, everything
starts to look like a nail!