The difference of a vortec

[BurnoutNova]

Originally Posted by 67_C-30

I think the revised numbers are basically the max capabilities of each head, and you and I both know not every builder is going to acheive those numbers. You're going to have those guys out there that going to run a flattop pistons in the 9.5 - 9.6 CR range, a camshaft that fits within the .480 lift max window, but he's going to put a single plane Strip Dominator or Victor Intake with 850 Demon or HP with 1 3/4 headers and chunk it in a car with a 3500 RPM convertor and 4.56 gears! Then he'll bash the Vortecs because he has a 1500 RPM power range with small cam and huge convertor. Then you also have the guy that will have the Vortecs machined, and put the biggest cam, intake, carb and headers he can afford and put it in a 3800# Chevelle with a stock or 2000 RPM convertor with 3.08 geared open diff rearend. The combination of parts is the most important (and often most overlooked) aspect of performance engine building.

happens all to often

[Billla]

Originally Posted by 67_C-30

I think the revised numbers are basically the max capabilities of each head, and you and I both know not every builder is going to acheive those numbers.

The combination of parts is the most important (and often most overlooked) aspect of performance engine building.

And in that we are in COMPLETE agreement

99% of the builds I do are between 1 and 1.2 HP/CID specifically because of this tendency to build too much motor - or worse, that lousy combination of parts.