looking to build up the engine, my big question is i want to increase my rev limit range. I was thinking about custom head work or just buying the cosworth perofrmance heads, then building up the bottom en with new rods, and the whole 10 yards... it is in a vq35de engine. not the HR or REV-UP model. comparitivly though, how would it performa against those? as I'd be dropping some $ and want it well spent. what are your opinions on custom eengine work? and he possible perofrmance... hoven't yet decided to go FI yet... may be in the future. I'd like to see 8K red line atleast if going NA, and there would be soem custom cams and def. tuning. I got diferent final drive installed and COld air intake as of right now, with LW fly wheel, and some other light mods as just recently got the car. I'm modding for race and street, but mostly for road courses that I have around here and attend.

 

you can't do an NA Build and then go FI...

if you do an NA Build.. chances are you are going with a High Compression Motor.. which is a bad idea for FI..

if you go with a a FI Build with is low compression, but run NA your car will perform just like stock..

 

ment I'm going toward NA, had the thought of FI. looking at options and oppinions

 

NA Builds are for die hard NA Fans.. you are going to spend close to or the amount of FI for about 310 whp .. as oppose to a ST/TT/SC Kit thats going to put you at 350 whp..

if you are looking for power.. save your money and go FI.. if you like NA and don't mind not making more than 330 whp.. then go NA

 

you actually can make more than 300hp at the wheels with an NA build, don't take their criticism so literal. but it will cost a lot of money. either way, NA or FI you better be ready to dump some money into the car. because you can't just keep your stock internals for FI, so there's the cost of the SC/TT/T kit, installation, internal renovation, installation cost of those. either way your spending well over $10k.

 

who? all the NA Builds i have seen are a little over 300 whp.. if you know anymore... please let us know

i did.. as have many others

 

i am just interested in NA as I've been more into that, and plus don't want some of the hassle that FI can have with it. I would prefer to build up the motor NA and that it, other than build it up, and then do an entire turbo system. money really isn't that big of a deel, not trying to go over too too much. 300-350 at the wheels would be my main goal.

 

if u do full na bolt ons and then want to go turbo, many of those parts would need to come off.

That's why its good to recognize your goals and budget when deciding how to mod ur car.

op, I'm not trying to be "holier than though" so to speak. If I could do it again, I wouldn't off bought half my bolt ons and just gone low boost t//tt. Now I'm waiting for a sc.

 

i had a maxima.. i bought bolt-on's for minimal performance.. my first mod on my Z was a Greddy TT kit.. i didn't even have rims yet

 

if you want to stay NA then read Z1 Performance aka Adam's build thread.. just keep in mind.. NA or FI.. once you start modding these cars all bets are off and nothing is garunteed to run worry proof

 

roger

 

Most people seem to think that you must go N/A or FI .You can build an engine with higher compression, (say 10.9 to 1)and stroked to 4.2l then run FI, you will be limited to 6-8 psi. I think this combination would have killer torque, and with a pair of small turbos you could spool up by 3k rpms. This is just one way to get there, So go ahead and start out with modding the the heads and engine for N/A, and if you change your mind and go FI then do so, althought this is a very expensive route to go.

 

Hunt down Adam at Z1auto.com he has a built N/A Z that revs to 8400 RPM and makes 303 rwhp. the cosworth heads (with 1mm oversize valves) are useless for a naturally aspirated build...actually most guys with F/I dont think theyre anywhere near worth the money they cost. to rev to 8000 youre gonna have to do alot more than headwork though...gonna have to lighten and balance bottom end components...