iron head motors are not dead

[SappySE107]

I told the machine shop that if they get any iron head 60V6 heads that I want them for practice. They give me their junk heads to mess with so long as I bring them back so they can get the scrap money for them

[Guest]

thing is with a gen 2/3 head, there realisticly isnt as much that can be opened up in the heads. if you put a ton of time and research and flowbench time coaxing every last cfm out, mabey they will outflow an ironhead. an ironhead can be ported more, and in the end result could flow the same amount.

But why worry about how much they can be opened up?

There have been people posting CFM rating on the genIII heads of up to 240 CFM, I know some 700 HP SBCs that don't flow that much.

Really it's not just about how much you can flow, but how you can utilize that flow.

[Doubt_Incarnate]

doesnt the port shape and size also determine when the power comes in?

i'm not sure if the iron actually have smaller ports than the aluminums, its been a while since ive been that deep in my old motor. but if the iron heads give a broader torque curve at lower rpms, that might be why they were in more rwd, and heavier vehicals.

lets not forget the better design of the combustion chamber, allowing for better control of higher compression ratios and better handling of higher boost levels. except for curtis's heads, didnt he have the chambers re-shaped?

[614streets]

except for curtis's heads, didnt he have the chambers re-shaped?

Maybe your thinking of my Iron heads. (Btw my motor still has 1500 miles on it , been to busy with work and the nova, I havent driven my s10 in 2 years since I broke the engine in on the freeway late at night way back in 2003 ) Hopefully I dont lose sight and find time to get it out again someday. It sure as hell wasnt as slow as the old set up

[Doubt_Incarnate]

I knew someone did it.

i posted a link in the "buy,sale,trade" section to an auction on ebay for a rare setup for rwd iron head with the hilborne style injection, maybe that'd look cool in your replica, and help you towards your 200hp goal as well, i know you were looking for a carbed setup tho. Hell if my cavalier was rwd i'd be all over that like a fat kid on cake. it'd just look realy wierd sticking up out of my hood sideways...

[614streets]

I knew someone did it.

i posted a link in the "buy,sale,trade" section to an auction on ebay for a rare setup for rwd iron head with the hilborne style injection, maybe that'd look cool in your replica, and help you towards your 200hp goal as well, i know you were looking for a carbed setup tho. Hell if my cavalier was rwd i'd be all over that like a fat kid on cake. it'd just look realy wierd sticking up out of my hood sideways...

Huh? I own a Chevy s10 not a replica, or maybe Im reading something wrong. That ebay set up is meant for non gasoline high compression race set ups not a street car. Pure vintage is all that is to me.
Im not a fan of anything that is N/A

[Doubt_Incarnate]

i was hoping the guy who started this thread wold see it. he's doing up one of those stalkers (I think).

no way in hell i'd trade your setup for that stuff

[614streets]

i was hoping the guy who started this thread wold see it. he's doing up one of those stalkers (I think).

OH OK GOTCHA

[Guest]

Ummm, the ALuminium heads have a better combustion chamber shape and size to promote better quench.
Aluminium is also a better conductor of heat, so again aluminium hedas come out on top.

[TurboZ24]

It would be even better if GM didn't like to use the worst quality aluminum they could get away with.

[Doward]

GM states the iron heads are good for 1.5hp/ci, mildly ported.

[Guest]

It would be even better if GM didn't like to use the worst quality aluminum they could get away with.

Agreed that a better quality aluminum would be prefered, but I bet the Iron that was used was not top quality either.

Besides, it's been proven countless times so far the integrity of the GM 660 heads is not a question. It always seems to be a piston or rod to fail plenty before a head cracks.

Most recent example I can think of is 89jy's turbo 3400, He's laid down north of 300 HP at the wheels, on a stock 3400. Yes he has had one 3400 fail and that looks to be because of piston skirt failure, the heads AFAIK were fine.

but we cdould sit here all day and go back and forth about which heads to use.
Myself, I stick with the aluminium heads, and will attemp to get north of 700 HP from the OEM offerings, if I do, excellent, if not, I'll find something to change until I do.

*Disclaimer* I'm still collecting parts for that engine, the Frankenbeast, and am still looking for a chassis to put it in.
The Franken60, that is in my Jimmy will be making north of 350HP.

[Naft]

GM states the iron heads are good for 1.5hp/ci, mildly ported.

seen it myself, theres an old performance manual they put out that has a good deal of stuff on the 60* V6. The bummer is that the heads arent worth much over .75 hp/ci in stock form

[rx191]

yea the stock heads didn't flow well at all out of the box, but i think in the early 80 when the catsings where first made gm didn't care about hp they onlt cared about milage

[geoffinbc]

Yea they were pathetic. Like 130CFM at .5 on the intake 120 on the exhaust