318 heads on a 360
so how bad will 318 heads kill a 360? the motor i have has a fresh rebuild on it,but the heads are 318 heads... cast number..4027163 i believe them to be later model smog heads as well.... im at a stand still until i find some 360 heads.. i'm running the comp xe274 h cam, long tubes, Weiand Stealth intake with eddy 4 barrel...
bottom end is just stock replacement
i have to work with what i got.. my money is slim pickens.... i just building a weekend cruiser.. not a drag car or street racer... im actually trying to sell the cam kit to get something a little smaller. i have and edelbrock performer i can pull off my 318 if need be
Here's what I see;
The cam is a high rpm cam.
The heads are dead at 4500
The stock rebuilt bottom end is sub 8/1 Scr, the 318 heads might bring it back to 8/1. But it doesn't matter, because the XE 275H, will kill the bottom end anyway.
So what you end up with is an engine with a powerband from 3500 to 4500. But it's a cruiser so that might be Ok.
But something will have to be done with the marshmallow bottom end, and this
is a good start, but yur not gonna get away with 2.76 rear gears. Consider 3.23s as the absolute minimum
Yur not gonna like this combo much, cuz it's gonna feel as tired as your 318, until the engine gets up on the cam.
With 3.23s that will be about 34 mph.
Having said all that, the cure is a smaller fast rate-of-lift cam, with an earlier ICA. Leave the rest alone, and you will have a nice cruiser. Lessee,on an LA, Ima thinking a stock 360 2bbl cam if you already have it, Or up to a 262 if you have to buy one.
But I just gotta mention that a 318 2bbl cam would kick azz with that combo, in a cruiser.
Why am I so confident? Because I did that to a 340, back in 75 and that combo is my second most favorite cruiser combo ever! In a 360, it has just got to be even better.
