Year End Horsepower Adjustments...

[Andrew Hill]

Originally Posted by Charley Downing

Tom when I try a new cam I haft to Buy two at a time. I have 3 sets on the bench that don't work @ around $1100-$1200 a set, plus the set in the car. Robin can try 6 to 7 different cams to my 3 sets. So don't tell me I don't spend the time and money on R&D. I can't tell you how many hours myself and others have spent at Holbrooks, Ronzello's & Big Stuffs trying tow find a little HP here and there.
Myself and others bulit my car from the ground up, so don't give me is BS about hard work and wanting everything right now. I work for everything I have. Just like most class racers.

Ed the 283ci 220/224HP is now 220HP in a 64-66 Chevelle.

Your welcome Norm, just think of it has a early X-mas gift.

Let's do a little comparison to that 283/220 Chevelle you're talking about and your 281/235/229 Cobra Jet.

Chevelle
283 cubic inches
9.25:1 compression
Rochester 4GC Carburetor
1.72 1.50 valves

Cobra Jet
281 cubic inches
11.0:1 compression
2x 62.5mm throttle body
2x 1.34 1x 1.50 valves

Cubic inches are a wash, compression to the CJ, carb/throttle body to CJ, valve area to CJ (plus lighter intake valves).

Take away the cam lift difference and intake difference because we're talking SS, add in the overhead cam and better heads to start with, and it's looking like that 281 of yours should be making quite a bit more power than that 283 Charley.

I'm not going to say that you don't work hard on your car because you do, it's a lot more of a real stocker than many new cars out there, but I do not believe you have built a true SS motor with all of the tricks and good parts that is necessary for most combinations to run fast.