Hi,
Could someone help me figuring the HP numbers for the following engine :
'77 305 LG-3, Edelbrock RPM Intake, CompCams
214/224 at 0.050, Hooker 1"5/8 Headers, Dynomax (no-cat), Edelbrock 750cfm carb. Everything else is stock. I was figuring about 210HP. Any better idea ?
Thanks.
(Sorry for my bad English...)

 

Andrew,

Welcome Aboard!

With 8.5:1 static compression, you aren't going to be making a lot of power unless you have added some induction help. The stock 4-barrel version of that engine was only good for about 160HP @ 4,000 RPM, and 235 lb/ft @ 2,400 RPM. Gaining 50 HP with bolt ons over stock heads and valves is probably not going to be easy. The cam certainly helps, but the small valves even at higher lifts are not going to allow enough flow to make that kind of power.

The opening of the exhaust is a good thing, since the earlier 305 exhaust manifolds are exceptionally restrictive. The 1-5/8" tubes were a good choice, since larger tube don't maintain enough velocity to scavenge the chambers well with the small displacement.

The Performer intake should help flow at middle and high RPM ranges, but again the valves are a restriction. It should be better than stock, however.

The 750 CFM carb is probably way too much flow for that engine, and unless you have vacuum secondaries with a pretty tight spring, you may be dropping intake vacuum way too much to make good flow under heavy loads. A little tuning and balancing of the carb can solve most of that problem.

A ball-park guesstimate would be 190HP tops, and that might be a little ambitious.

Incidentally, your english seems fine to me. Then again, mine isn't very good at times, so I may not be the best judge.

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Later,
Vader
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Justice and Freedom will Prevail

 

Thanks Vader, I appreciate your advice.