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Quote:
Originally Posted by frnkeore
So then, the best way to fill that cylinder, with the port that came with these engines, is to reduce the cubic inch displacement, to get the highest HP per CI.
In a class that has 11 lb per CI, it would make since to reduce the size of the engine or, at least increase it to a minium and get as much compression as possible.
A .030 over 221, 24 stud, would be a 225 with the stock stroke and 217.75 if you offset grind it to 3.625. A 239 would be 243.85 and 235.7 with the 3.625 stroke. With the smaller engines, porting and as much compression as possible, I think you could get 1 HP per CI, or more.
I can't tell you what it might take to get 10/1, or higher C/R on a engine that small but, that means that you can have a car as light as 2398 lb.
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You may be interested to read about Barney Navarro's work with small displacement flatheads. He de-stroked some of his blown engines to fit into different race classes, but I believe he also understood the need to get more air into the motor. Between oxygen injection and blowers, I think Barney was on the right track.