hiii ,im planning to get a new stag4 ported head .wat do u guyz think is better stage 4 jam or stage 4 cosworth ?heard gud things about both but cant decide
which 1 to get .
thanx

 

price will be differant, why not a busher ported head.

 

yes may be ill check wid that also but the price for the cosworth and jam is no such difference , all i wana know is which will give me more hp
thanx

 

to me for the money they are both good but the cosworth may not be worth it unless you have a million mods. What mods do you have?

https://www.evolutionm.net/forums/sh...=cosworth+head



https://www.evolutionm.net/forums/sh...&highlight=jam

 

full race gt35r turbo kit ,jackson auto machine 2.3l stage 3 short block siting wid me and goin to install wid a new head .power fc d jetro ,880cc ,turbo xs fmic ,hks dli2.
lots of more stuff .

 

If you were talking about bottom ends, I would most definitely say JAM. Their experience in building engines is right up there with the other big 4G63 tuners. A high-flowing cylinder head, however, seems to require more R&D, number crunching, and engineering, whereas building a bottom end is more of an art form. For this reason, I would say do your research on the exact specs of each cylinder head and where you want to go with your setup, and then from there decide. Although pretty new to the 4G63 game, Cosworth's CNC'd head may prove to be a great option for high power builds. Just my 2 cents. Good luck!

 

well thanx for the info .any 1 else ? btw u running hks 280 cams .r u running them on the stock valve springs or uve upgraded them ?
thanx

 

bump

 

There is someone on here with a JAM ported head on a JAM 2.3 w/a full-race 35R kit making unusually big numbers under the curve for the combo. I can't remember their screenname, and the car was up for sale not too long ago, but that tells me that the JAM head works pretty well.

 

The JAM head outflows the Cosworth head, end of story.

Of course, this doesn't mean squat unless one has a setup that can take advantage of the increased flow potential, and that is the real rub.

 

JAM flowed a cossie head against one of theirs.......

the cossie head still had filings.....

our JAM head has been phenomonal!

plus you are dealing with the people that do the work, not some sales person...

cb

 

I'd go with JAM. They are proven to be one of the best. I believe its less money too!

 

call Jackson..... they will answer all of your questions....

they are fantastic..

cb

 

I have spoke with JAM on the phone about head work and the guy spoke to me for about 20 min answering all my questions. They are really great people to work with and have great customer service. I would recommend them to anyone. Just call and ask, you have nothing to lose.

 

yea no doubt about the peoples at jam ,they r really gr8 peoples as i just recieved my short block from jam and also planing for the head from them but few ov my frndz confused me so i thaught about asking u guyz wud be perfect for me to decide which way to go.
thanx for ur views.