C3 383
Thread Starter
Heel & Toe
Joined: Apr 2014
Posts: 15
Likes: 0
From: Byron IL
383 build
I looked up your cam and the numbers appear mild, but this definition leads me to believe that they messed with the valve event numbers like the junky line of "Thumber cams" To make a motor sound radical, but they are all show and NO GO! Your build did not follow the description.
Your carb size is fine. The Torquer manifold was garbage from 35 years ago. It doesn't have enough distance from the carb base to the plenum bottom and it doesn't have any tuned ram effect. I've used quality single planes on my vette for 30 years. One simple single plane improvement is a .5 to 1 inch 4 hole carb spacer. It would definitely help your intake.
Your heads are an improvement over stock chevy heads.
1.6 rockers are a very minor improvement, but then it comes back to the cam not being an efficient one.
true dual exhaust are an improvement
I had a 383 with a 700R4. Only I installed a 3500 stall very efficient 9.5 inch. You are instantly in the power range and I had to install 315/17 inch rear tires in an attempt to get traction. I could do some long second gear burnouts
http://www.summitracing.com/parts/SUM-1784/
Rough idle, mid-high rpm power. Requires 9.5:1 and higher compression, 2,500+ stall, and gearing. 350+ c.i.d., largest street performance camshaft.
Your carb size is fine. The Torquer manifold was garbage from 35 years ago. It doesn't have enough distance from the carb base to the plenum bottom and it doesn't have any tuned ram effect. I've used quality single planes on my vette for 30 years. One simple single plane improvement is a .5 to 1 inch 4 hole carb spacer. It would definitely help your intake.
Your heads are an improvement over stock chevy heads.
1.6 rockers are a very minor improvement, but then it comes back to the cam not being an efficient one.
true dual exhaust are an improvement
I had a 383 with a 700R4. Only I installed a 3500 stall very efficient 9.5 inch. You are instantly in the power range and I had to install 315/17 inch rear tires in an attempt to get traction. I could do some long second gear burnouts
http://www.summitracing.com/parts/SUM-1784/
Rough idle, mid-high rpm power. Requires 9.5:1 and higher compression, 2,500+ stall, and gearing. 350+ c.i.d., largest street performance camshaft.
