SB Cam Advancing Question
Thread Starter
Burning Brakes
Joined: Apr 2001
Posts: 752
Likes: 1
From: Springfield Oregon
SB Cam Advancing Question
Here's my cam specs. I'm wondering If I can advance this cam 4* to try and pick up some low end. Right now I'm only getting 140psi cranking compression. I had heard that with an intake lobe centerline of 107, and an LDA of 112, that meant there was allready 5deg. of advance ground into this cam. I know that's the right math for a single pattern cam, but not sure if it applies to a dual pattern. Can anybody help me out. It's a Summit cam if that helps.
Safety Car
Joined: Aug 2001
Posts: 3,685
Likes: 202
From: Waterford Mi
Re: SB Cam Advancing Question (ORVette)
The only way to know where to set the cam timing is to use a degree wheel. That way you know if the gears and chain are where they are suppose to be even if something was messed up during production.
Le Mans Master
Joined: Aug 2000
Posts: 6,362
Likes: 7
From: Brazos TX
Cruise-In IV Veteran
Cruise-In V Veteran
Re: SB Cam Advancing Question (ORVette)
The only way to know if changing the phasing of the cam gained anything requires testing output before and after the change. There is a lot more to it than cranking pressure. I wouldn't use that as your only measure. The cam you have is pretty mild. Unless you have under 8:1 compression, that should perform good. If you want more torque, go with a wider LDA.
