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Thread: Compression and cam timing
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05-08-2008, 06:27 AM   #6 (permalink)
JN-Motorsports
 
Join Date: Feb 2008
Posts: 61
Re: Compression and cam timing
Quote:
Originally Posted by 4Lowie View Post
Hi all. My 347 is being built for a road car (65 Mustang). My question is, can I run hi compression and keep the cam timing mild to make it nice and drivable? Was think the hi compression would help make hp, mild cam timing would keep it drivable.

Thoughts please.

Thanks, Dave
Dave,
The cam timing can effect the compression. As you probably alread know most cams are ground with +4 advance based on TDC. This is to make the cam more drivable, Idleable.... If you retard the cam to true zero, it can increase the "Static" compression and take some drivability out of it. It's all based on the intake valve closing position and how much intake charge is allowed to excape. It's call the Volume/pressure index and requires a large slide ruler to calculate. Good Luck.

Jeff
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J Jackson
JN Motorsports
www.OldGuysGoingFast.com
TAD, S/C, S/G and S/S
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