V6 Aluminium Heads available SOON!!!

[Michelson4301]

http://www.zzperformance.com/grand_p...73118783146209...

Check that out!! I can't wait. All I want for christmas is 2 alloy heads

[VSIIBerlinaL67]

this is gonna sound stupid, but what makes the alloy head better than the iron heads?

[hakhawk]

did you read the link?

The ports and combustion chambers were designed by Richard Potter who placed in a few of the US engine masters championships. We were referrred to him from our Rep at Comp cams, Tim Cole.



The heads have every flaw we've experienced in the 3800 market addressed.



As cast, the heads outflow any ported iron head currently in our market. They have been designed for addtional porting for those who wish to take them further. Look for flow numbers approaching 300CFM on ported units.


We have improved our heads over the factory units in about a dozen ways. One of them is the problem high horsepower cars have with MLS gaskets leaking at the top and bottom of the chambers. We have addressed and fixed this issue with changes to the structure of the head. More details and internal pics to come...



other than that, alloy heads are lighter, which means less weight. other people with more knowledge can probably give you more reasons why theyre better.

[VSIIBerlinaL67]

ok so there lighter. thanks

[hakhawk]

theyre lighter, they flow better, have most if not all factory flaws removed.

they are a better head overall, whether you supercharge, turbo it or go n/a, its gonna shit all over the stock heads which are already pretty good.

[VSIIBerlinaL67]

yer i know there better, i was just asking why are they better material wise, like what makes alloy better than iron

[Michelson4301]

they conduct heat better= better heat dissapation

[Michelson4301]

I am buying a set ASAP, who else ? we might be able to do a bulk buy/massive discount if enough people come up with the money.

[hakhawk]

any idea on price? id consider a set to drop onto the vn block if reasonable price. (didnt see a price on the site, didnt really look)

[Michelson4301]

Don't think they are to suit the VN style block unfortunately, I think there are alloy heads already out there.

[hakhawk]

they will fit the vn block, but need to change cam and make a custom intake manifold. i havent seen alloy heads for the vn, only pre vn turbo buick stuff, which might also fit, but theyre about $1600us a pair

[Michelson4301]

http://www.gmhightechperformance.com.../photo_14.html

Try that, might be the same ???

[Michelson4301]

That's cheap for cylinder heads considering they should give you a conservative 30hp increase in power, without mentioning fuel savings and weight loss

[hakhawk]

umm, i dont get your last post, is that a typo? i assume you mean 300hp? as i wouldnt call 1600 us a reasonable price for 30hp.

http://www.championgn1.com/gn1/produ...mcylinder.html
http://gnttype.org/techarea/pictureg.../GN1heads.html

thats what you get for 1600us

http://gnttype.org/techarea/pictureg...geiiheads.html

and thats just insane

[1991_Vn2nV]

He means cheap for cylinder heads...Rather than cheap for the power gains.... Those aluminium heads will probably be pretty expensive too im guessing considering the prices for the other heads on that site ($1099US for Stage 2, $1599 for Stage 3, $1799 for Stage 4).

[Patrio7]

and right down the bottom

GN1 Cylinder Heads are not certified for use in any Emissions certified application, and as such, are for Off Road Use Only!

[Michelson4301]

Who's talking emissions legal ? yeah that is what I meant, don't want to speculate and comment- $1500 for extra 300hp, keep expectations low so as to not be dissapointed.

[Michelson4301]

Have sent an email to ZZPerformance about group discount, awaiting their reply

[FXST01]

Who's talking emissions legal ? yeah that is what I meant, don't want to speculate and comment- $1500 for extra 300hp, keep expectations low so as to not be disappointed.

I don't think these heads will give you an extra 300hp, but designed for engines up to 300hp.

[ephect]

Finally something for the humble V6, (expectations low of course!!) but will be very interested in getting a set, depending on price is the big 'get it now' or something to save up for

[wassup393]

where are those 300hp going to come from!!!!!!! on a stock setup your 30hp gain would be far more relevant, however the more modified your engine is the more restrictive the stock heads will become, even with porting. follow this up to a boosted application and it will be even more important. Consider it similar to the exhaust, from a stock exhaust to a full extractors back setup provides a moderate power gain, but if you had a 400hp turbo setup and fitted a 1.5" press bent, the difference might be 100+hp of restriction.

[hakhawk]

i didnt notice that zzp were quoting average 30hp gains on their ported heads, which i assume is where you got the figure for a guide on incease.

but id expect a better increase out of a set of redesigned heads, as opposed to a set of ported heads where the flow is already pretty damn good.

and those GN1 heads, i dont see why we wouldnt get away with using them, as our motors emissions are controlled by the ecu, not egr gear strapped to the motor. it means we ca modify the tune, to still keep within emissions range.

but still, if you're gonna spend 2g on a set of alloy heads, you're gonna most likely turbo it which throws emissions out the window anyway.

[Michelson4301]

i didnt notice that zzp were quoting average 30hp gains on their ported heads, which i assume is where you got the figure for a guide on incease.

but id expect a better increase out of a set of redesigned heads, as opposed to a set of ported heads where the flow is already pretty damn good.

and those GN1 heads, i dont see why we wouldnt get away with using them, as our motors emissions are controlled by the ecu, not egr gear strapped to the motor. it means we ca modify the tune, to still keep within emissions range.

but still, if you're gonna spend 2g on a set of alloy heads, you're gonna most likely turbo it which throws emissions out the window anyway.

I was not quoting anything off the ZZP website, I myself would expect to see a MINIUM of 30hp increase from just bolting the cylinder heads on and tuning. There is nothing more in that comment. The "300hp" comment is similar to how machine shops quote their heads ie. "ported to flow 300hp" this is all that figure is used for.

[cruzncommo]

you can get alloy heads for all the GM engines, and i can vouch that they make a big difference...

[deathsminion]

And if they get hot, you've got no hope of fixing them. Cast iron for the win!