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08-21-2006 09:49 AM #1
My Chevy 355 has little real power - looking for suggestion on CAM change
This is a 350 with a flat top pistons, and a full Holley Sytemax kit (234/244 cam, high flow aluminum heads, intake manifold). Also running full roller rockers, and using a Holley 750 carb with #69 Jets. It is running well, I can get it to idle at 600rpm even with this lopey cam. Running a TH350 tranny.
Problem is that I SHOULD be able to spin the tires off a stop, but can't. I have 35" diameter tires (Jeep), with 4.10 gears. I'm pretty sure this is not the core of the problem, but it contributes I'm sure.
I run at 2000RPM torque converter. I had a 3000 stall speed converter, but I hated revving up at every stoplight. I am quite certain that the core of my problem is engine to torque converter mismatch. I need to swap my cam for a cam with a lower RPM range (90% of my driving is 1800-3000 rpm on street and offroad). But before I do, I wanted to get some feedback.
If I do a cam swap with lower durations, should I also change out my intake? WIll I still be taking advantage of the aluminum heads? Any suggestions for a CAM? I am very much wanting a low rpm torque monster and I do not have that now.
In our neighborhood, 2 blocks down the hill was a gas station that (to me) all the cool car guys hung out there. 32 coupes, 33 & 34 Fords as well, a sweet 56 Ford Beach wagon that was setup gasser...
How did you get hooked on cars?