|
Re: hp estrimate again.
With '78 model unported heads (probably 882's or 624's), there's no way that engine is anywhere near 375. With flattop pistons, and 76cc heads (that's what '78 model heads would have been) the engine is probably around 9 : 1 or a little under. Your pistons would be 10 : 1 with 64cc heads. To acheive 10:1 with 76cc heads, you need a .125" domes.
I'd estimate the engine in the 300-ish range, maybe a touch more.
What you have is basically a stock engine with a cam. You have to consider that pre-1972 (pre net HP ratings) 9 : 1 CR 350 4bbl made between 260 - 270 HP. Depending on which heads you actually, they will either be comparable or flow less than earlier heads. A performer intake is equivalent to a non smog 4bbl intake in terms of airflow, and your 650 Holley with vac secondaries gives up a little power compared to a new tuned 750 Q jet.
Taking that into consideration, your cam and headers are really the only power adders. A camshaft and headers alone can not gain 100HP over what is basically a stock engine.
|