What DCR for 6# Supercharged?
Thread Starter
Teching In
Joined: Aug 2003
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From: St. Louis Missouri
What DCR for 6# Supercharged? I'm looking at having 6-8 pounds out of a Procharger on my GTO. I'm trying to select a cam (probably pistons and heads too) that would best fit this application, and I'm wondering what DCR I should aim for. I've seen 8.5 all over as optimal, but that seemed to be for N/A applications, and I'm not seeing much info for blower cars.
As your PSI goes up, should you worry more and more about DCR?
I would like to stay at a conservative 6-8 pounds, and would like to stick with 93 octane.
As your PSI goes up, should you worry more and more about DCR?
I would like to stay at a conservative 6-8 pounds, and would like to stick with 93 octane.
Thread Starter
Teching In
Joined: Aug 2003
Posts: 16
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From: St. Louis Missouri
Well, I'm trying to figure out if I need to lower my static.
A cam I was looking at with stock heads and pistons put me at a 7.9 DCR.
I can get 6.0L heads, and bring the SCR to 9.4, and the DCR would be 7.4.
Add 8.6 cc pistons with a 6.125 rod to the 6.0L heads and I am at 8.7 SCR with a 6.8 DCR.
A cam I was looking at with stock heads and pistons put me at a 7.9 DCR.
I can get 6.0L heads, and bring the SCR to 9.4, and the DCR would be 7.4.
Add 8.6 cc pistons with a 6.125 rod to the 6.0L heads and I am at 8.7 SCR with a 6.8 DCR.
Thread Starter
Teching In
Joined: Aug 2003
Posts: 16
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From: St. Louis Missouri
My static should be 10.1:1. I'm going to be going with a Procharger, and that does have and intercooler.
I've been playing with a calculator and just watching the numbers change. I'm not even sure what numbers in the valve events I should be looking at that will be good for a supercharger.
I've been playing with a calculator and just watching the numbers change. I'm not even sure what numbers in the valve events I should be looking at that will be good for a supercharger.
Any problem with going to a solid roller cam? I'm running a Vortech-blown 383, max 7.5# boost (blower maxed out - need bigger) with a small solid roller - 230/236, 112lsa, net lift .575/.584. It's great everywhere! It is 2 of their Xtreme Street Roller lobes.
With your 6-speed, I'd step up to a 236/242, 114lsa. Comp Cams will grind for you from their lobe catalog. With a 1.6 rocker you should net .584/~.595. That thing will idle well and rev like a sonofabitch.
Jim
With your 6-speed, I'd step up to a 236/242, 114lsa. Comp Cams will grind for you from their lobe catalog. With a 1.6 rocker you should net .584/~.595. That thing will idle well and rev like a sonofabitch.
Jim
