3500 head ?'s

[boostedrs]

alright i was in the middle of a 3100/3400 head swap on the new engine for my camaro
i had goten a set of gen 2's for free so i had them ported and got 233 cfm @ .500 lift.For the manifold i had started to modify a berreta 3100 lim to clear the dizzy and use full custom runners. i pretty much machined away most of the manifold in order to build my own runners.
Somone on tgo seen my build post and had mentioned the 3500 cyl head and that they have been proven to flow 290cfm around .500-550 lift with port work.

is this true.
How available are these heads in a junkyard?
Will they bolt onto a rwd block.
What kind of manifold would i have to use

would they be worth the swap over my gen2 heads?
btw this engine is turbocharged

[kflo 93 gt]

There are flow numbers around here somewhere for the 3500 heads. I don't remember what the exact numbers were, but they flow well, definately more than your Gen 2s. As for availability, I've seen quite a few sets of heads and intakes for them around on the internet. I would imagine they'll bolt onto your rwd block since the aluminum gen 2s do. The bolt pattern didn't change. For intakes you'll need a 3500 lower, and then you can choose to run either a 3400 or 3500 upper. Ported 3400 upper outflows a stock 3500 upper, but the ported 3500 upper is a monster.

I would say it would probably be worth it. The 3500 heads are nice, and I've heard nothing but great things about their performance.

[boostedrs]

thnx man ill hunt down those flow number for them,and compare them to my ported gen2's.i tried on ebay for the 3500 heads but cant find any,
happen to have any info like combustion chamber and valve size?

[Superdave]

All that info is burried in this forum somewhere. I'm planning on getting my 3500 heads flowbenched locally sometime this month. I'll post the #'s after that.

[SappySE107]

.500 numbers are all but worthless. The 3500 heads will outflow your ported gen 2s from .050 to .350 lift most likely. I don't go for max CFM at high lift because you have to hog out the ports too much. This kills velocity which hurts low RPM power and economy. Stock 3500 flows 230s at .500 and the cc of the intake port is less than a gen 2 or 3.

[boostedrs]

thnx guys

[Joseph Upson]

If you are using stock dimension pistons designed for use with the cast iron heads your compression ratio will be sky high, then again with the 3500 heads maybe Saturn or Jupiter high. So check into that if you haven't addressed it already as I saw no mention of it.

[SappySE107]

the 3500 heads will have less compression than the 3400 heads, and there are a couple people that have done that without any problems (tuned).

[boostedrs]

If you are using stock dimension pistons designed for use with the cast iron heads your compression ratio will be sky high, then again with the 3500 heads maybe Saturn or Jupiter high. So check into that if you haven't addressed it already as I saw no mention of it.

yeah i have forged 3100 pistions already