Thread: 454/502 hybrid custom build...

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If I were building for a truck engine, I wouldn't want to increase the compression ratio over 9:1 because then you will have to use a longer cam which in turn will move the available power higher up in the rpm range, just opposite what you would expect from a truck motor.

Make up your own mind what you want to do, but if it were mine, I'd use the Keith Black #KB203 which will have thick rings (5/64ths") and make 9.0:1 with 118 cc heads. Then I'd call my favorite cam grinder and tell him what I wanted to do with the motor and go by his recommendation. Alternately, I'd use this cam which would give me a dynamic compression ratio of 8.00:1
http://www.cranecams.com/?show=brows...tType=camshaft

Here's the KB info.....
http://webpages.charter.net/beckracing/page36.htm#SECT3

hey guys...

sorry i didnt speculate on what im putting this motor in...
its going into my 68 camaro and im looking to get around 500FWHP or so out of it...

the shortblock is the vortec series truck engine and I was going to change out the pistons and cam so i can get the performance of a pass. car shortblock but with the strength of the truck engine...

so, in that case...i wanted to bump the CR to around 9-10.1 and use that cam i originally specified...

will that cam be too much for the fuel injection setup?? ive seen that cam in a ram jet 502 that made almost 600 HP so i thought that it would work well...