Sup fellas,

Going to be building some heads for my Z in the next few weeks. Just wondering if any of you NA guys have P&P, upgraded valvetrain, cams, etc your heads and what kind of power gains did you see on the Z. I am going to do this reguardless of power gains....just wanting to know what to expect out of the Z. Thanks guys!

 

iirc there was a guy on here that completely built his engine and he was making about 330rwhp revving up to 9K

 

Im planning to do the same thing, want to keep my car as reliable as possible since this is my only car at the moment. From what i have read about p&p and cams you can see about 310-350WHP depending on the heads and cams you use, plus a good tune.

 

Anyone have dyno charts? Those numbers seem high for just some head work.

BTW - I'm pushing 247whp all motor with i/h/e, tp, spacer, UTEC, flywheel/clutch. I have nitrous, but we're talking all motor at this point. I understand different dynos produce different numbers.....but I doubt I'd gain 100whp with head work and the numbers I currently produce. I'm thinking maybe after built heads and cams.....maybe 280-295whp (in my case)?

 

theres a guy on this forum that has a n/a built motor pushing 330+whp all motor. i think he's from australia...theres also a thread some where here that shows about ten or so racing companies that have built n/a z's in the 310+whp range...its possibble!!! now if you just do your heads your looking at around another 15 ponies, tuned!!!

 

yea, built motor also means built block. Increasing displacement when you build the block will give you more power. 15whp with just heads? That kinda blows. lol. Oh well...block after that with 11.5:1 and a big shot of spray coming soon. SGP, you're fixing to make a few more bucks! lmao.

 

lol, i know what you mean. it sucks to know that you cant make much power n/a with out building the block. but whatever, im going to do heads & cams with a 100-150 shot. should be alot of fun!!!

 

It will be. I have 150 shot on the Z now. 440wtq is fun! haha.

 

The bad thing is you cant really get huge cams for these engine like around .550" lift. Well at least im not aware of it if you can. I would of liked cams somewhere around .500" in my engine.

 

NA/nitrous/turbo cams all have different profiles. NA/nitrous cams can have similar profiles, but turbo...is definitely different. I don't need anything extreme....I'll probably just regrind mine since I don't see alot of nitrous cams out there.

 

Just your LSA is all thats diffrent. You want around 114 degree centerline for forced induction. 110-112 is better i think. This is just so it doesnt blow the boost out the exhaust valve. The lopey idle on muscle cars from wider seperation angles like 120 degrees. Because the exhaust valve is open longer while the intake valve is open.

 

;-) You just wait till we talk again.... The Cams here now are sweet for N/A & NOS...

Mark

 

Finally doing more mods? Say Hi to my car when you go by there...

 

Yeah thats Richie from Australia. I forgot his forum name. He did a complete build and can rev his Z to 8k rpm. If you use Nismo s2 heads, cams, uprgrade the valve train, bore out cyl. to 3.8l, high comp pistons, connecting rods, ITB kit, long tubes, dual exhaust with a X pipe, all the bolt ons and a tune with a standalone, I am sure you can hit more that 330whp. Richie is using s1 heads and cams... the s2 makes more power. But this will be $$$.

 

Not too much into Nismo's products. Going to build my heads with SGP's head packages. Gonna buy some stock heads from a forum member (if pics look good) and build those so my car isn't down and I can return it to stock using my stock heads. I want to stroke the motor, but GTM's pricing is real high and I still haven't seen the R&D results yet. I think I just might resleeve and bore it out. Less expensive and it has been prove over and over to work.

 

100mm pistons give you a 3.8 liter. Or do a shortstroke 3.2 and make a 9krpm motor.

 

^^^ Wow Thats Insane!!!!

 

come one buddy, share with everyone else!!! what kind of cams do you have???

 

I maybe able to break 300whp with cams and a tune on a happy dyno.

 

haha...that's what I wanted to hear!!! didn't realize I passed your post. I called yesterday, but Nick said to call back and I got sidetracked. Call you in a bit Mark.