Brodix RR vs. GM stock big ovals
I just ordered a set of Brodix race-rite heads for my BB Chevy 402. they have 115cc combustion chambers and 2.25/1.88 valves. The plan was to gain 50-70 more hp. Now I see that my current head casting #'s are GM 336781 and by all accounts the best open-chamber 454 open-chamber large oval port head that GM made. My 454 heads have Manley 2.19/1.88 valves.
I am not changing out pistons, I have Wiseco 5039H6 with a +38cc dome.
So should I send these Brodix heads back or keep them and install them? Am I going to gain any power with the same CR or not? If not, then I don't think the new heads will be worth it. For me, the $1850 won't be worth it to save 50lb of weight, if that's all I'm getting out of these heads. I mostly drive on the street.
If anyone has experience with a swap of this type and has an opinion I would like to hear it please.
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1980 Pontiac Trans Am, Chevy BB 402 + .010, TKO 600, Motive 3:73's, Hotchkis TVS, Coddington Junkyard Dog 18's, Nitto NT555 rubber, Autometers
Last edited by Bandit; 01-14-2007 at 04:58 AM.
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