ok just purchased used 05 heads and im planning to upgrade it. i need opinions on what i maybe missing and added product review from people who may have this installed on their vehicles already.

3 angle valve job
nismo headgaskets (349)
Supertech oversized 1mm valves, seats, retainers, springs (1000)
arp L19 head studs (490)
tomei cams 268 (1400)

anything else? also 300 whp possible with the head upgrade only?


also getting a vortech supercharger.

 

A couple of things:

Do the HKS head gaskets instead of the Nismo's. They will seal better with the stopper rings.

Tomei cams will not work with the Rev-up heads with magnetic valve timing.

 

wait, these heads wont work on my 04.5? clue me in please.

 

i just learned that i am royaly screwed

 

Yeah, I was going to post that the Rev-Up motors have different heads, but I can tell you have found that out, sorry.

 

Not all 05' Z's are Revups! Only the Track and 35th anniversary are, so double check on what you have...+1 on HKS headgaskets....

 

Very true, good point.

 

He's screwed..... he has an Enthisiast.

JET

 

we'll see when the heads come in... thanks for the help guys... shucks

 

few things to mention

1. the stock heads have a 3 angle valve job already
2. oversized valves - not with only a Tomei 268...I wouldn't bother
3. Tomei 268's are no longer in regular production
4. The NISMO headgaskets are excellent

If you end up striking out with the heads you got, let me know. I have a set of 03 heads I'm selling that will work perfectly for your engine builder to play with and build

 

interesting, what other info can i get still? i still wanna build some heads.

 

you know....we are an HKS pro dealer!!!

 

Can you please explain #2 ?? thanks.

 

with all that you might as well have some port work done while you have em off the car... especially if you are going FI

 

Z Phat Z - a 268 cam is not a particularly aggressive unit, and as such, stock valves are perfectly large enough for air flow.

 

Did everybody miss this little query?

Short answer: No.

Long answer: do a search for 300 hp and see what you find. It is the golden nugget of N/A builders - only a couple of people I've seen have attained 300 whp, and that's with a fully built engine and lots of tuning.