what heads should i use?
Thread Starter
Pro
Joined: Feb 2002
Posts: 500
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From: sebastopol ca
what heads should i use?
my buddy has a 69 chevelle and he's gonna drop a zz4 in it and he's looking for about 440 hp at the crank. we decided to buy a zz4 with a hot cam
thats: Duration - I: 218° E: 228° @ .050" Tappet Lift
Lift - I: 525 E: 525 with 1.6 rocker
use a holley 750 and an RPM air gap intake. heads don't flow quite well enough nor are the valves big enough so we were wanting to know some good aluminum heads that flow better and have bigger valves than stock zz4 heads. If any of you have built a similiar motor or know of a good set of heads for this application, please tell me :cheers:
thats: Duration - I: 218° E: 228° @ .050" Tappet Lift
Lift - I: 525 E: 525 with 1.6 rocker
use a holley 750 and an RPM air gap intake. heads don't flow quite well enough nor are the valves big enough so we were wanting to know some good aluminum heads that flow better and have bigger valves than stock zz4 heads. If any of you have built a similiar motor or know of a good set of heads for this application, please tell me :cheers:
Drifting
Joined: Feb 2002
Posts: 1,906
Likes: 0
From: Berlin
Re: what heads should i use? (OatBoy)
AFR makes very good heads, although pricey. I don't know about the heads on a ZZ4, but AFR 190 heads flow much better than fastburns (which is put on the ZZ430/450 engines) at high rpm.
