ok so i've been out of the "org" scene for a while... but now I'm back... i have a 4th gen V2 SC'ed max, manual trans, stage 2 clutch, and aluminum flywheel with full stillen exhaust, will stock pulley. i used to get lean codes... but now i don't... (i didn't even change anything) ANYHOW, i want more power but i wanna do it right... so what's next? and where do i get these parts? obviously a smaller pulley will give more boost... but my friend recently blew his motor running the 3.33" without any other upgrades other than AFC...

there are alot of new fast-*** cars out there now and i want the famous sport sedan of them all (the maxima) to still stand strong... especially since i've already dumped over 12 G's into it... I can't quit now right?!?!?!! so help a brotha out... thanks you all....

~hooktup98se

 

I'm surprised your friend blew his motor with the 3.33" pulley. What is that, 8 psi? Something must have been not right with his fuel delivery system.

Anyway, if you want to pick some good power at top end and don't want to mess with swapping pulleys, then get the MEVI (Middle East Variable Intake). That adds about 30-40 hp to SC'ed Maximas. You can find details in the 4th gen adn group deal forums.

Other than that it's go to a smaller pulley, or make the big plunge and go turbo.

 

Get the 2.87" pulley, you won't have to do much except make sure you running proper fuel delivery. Run at least 1 step cold plugs gapped. And even get a j&s to prevent to monitor your motor.

 

Wow. From stock pulley to 2.87 in one swell foop? I don't think the 240 cc/min injectors on a 4th gen can deliver enough fuel unless you jack the fuel pressure up to an unsafe level. Anybody in the org successfully run a 2.87" pulley with stock 4th gen injectors?

 

Hi Stephen.....I think 5th geners has a larger fuel injectors than that of 4th gen. do you know the volume of 5th gen injectors? 300cc maybe?

I know Jane97SE is running 2.87 pulley. I am not sure if she's using 300zxTT's injectors or not.



hooktup98SE: I would definitly look into gettting a larger injectors before any pulley swap. what fmu are you using? If you still have a stock 6:1...I would change it to 8:1 (or a cartech adjustable FMU) to deliever more fuel. Smaller pulley is the quickest way to more power. but you will need more devices to monitor and cool it. If you dont have a fuel pressure gauge, I would recommanded to get one. Heat will become an issue with smaller pulley so you might want to get something to cool the intake air. (every 1psi of boost will bring up 10 degree F of the compressed air) So far the cheapest and cooling devices is the water injection...they cost 420 dollars and not too hard to install.

 

Buy a new car

 

That's my wife's solution to every car problem. What, repairing the bent Johnson rod is going to cost $500??? Buy a new car!!!

 

No but a fast car can be made faster, and so so fast car is alot tougher.

 

3.125 with an 8:1 FMU disk & MEVI, you will love it. I agree that a 2.87 is risky with 240cc injectors. I was over 300whp with a 3.125 and a MEVI and thats running ~90psi fuel pressure, with a 2.87 you'll need closer to 100psi. Most high pressure pumps GPH flow rates begin to fall off at higher pressure rates and I think even this is in the danger zone for the walbro. I never thought it was worth the risk, hence the 370cc injectors for the 2.62 pulley. Safe is better than sorry.

 

Who make a water injection system for around $420?

 

Using a stock ECU you will see little to no benifit from using a water injection system at 9psi or under. The ignition timing in the stock 4g ECU is very conservative so no detonation will result provided the AFR is tuned properly at 9psi and under. The intercooling effect of WI is negated by the extra space that the water/steam takes up in the combustion chamber. The main benifit of WI is the abality to run more advanced timing. Timing is power. With a SC making 11psi you will only be past 9psi for perhaps 750rpms, even then its almost not needed, for a turbo where you would be at 11psi from 4000rpm till 6500rpm their would be more benifit. I only needed WI when I ran the GF ECU with advanced NA timing on my 14psi SC set up. If you must do it here is a link to the system I built, it works great and is 1/2 the price of the Aquamist.

http://www.turbomirage.com/water.html

 

Hi Gabe....thx for the PM on cat-back.

aquamist makes a water injection for 420...the site is aquamist.uk.com IIRC.

 

Hehe you mention aquamist... guess what I have sitting in a little box at the shop right now

First I need to get a new cone, and I'm now waiting to get my tranny back.. should be done on monday.

I went to check out my old clutch discs today... oh man I swear they were paper thin Good thing I took the tranny out before it got me stranded somewhere!

Oh and the band... it had rips and bulges all over it - can you say buuuuuurn!

 

thx for the link mardigrasmax. I will definitly look into it because aquamist costs quite a lot.

so seems like you are saying that if I dont plan to advance my timing, getting a WI will not benefit my setup if I am running at ~9psi peak boost (I am actual running 10psi peak) But it does cool the intake air and makes it more dense. That should make more efficient combusion. Y2kevse did WI without advance timing and did see a gain...even though peak boost dropped from 11psi to 9psi.

 

wooo....you got new toy... hehehehe...I should have my oil cooler done tonight, hopefully.

so your nismo built tranny finally gave on you? so what did you do? you always have a backup tranny in your garage, eh? now I am nervous...

you saw the clutch band without tearing the old tranny apart? I remeber I saw Kevin's and it was like half an inch thick (If that black disk is the clutch band)....how thin was yours?


how was your ATF, btw? was it black?

 

really? 30-40 hp? whoa!!! where do i order that from and how much? and what is the best FMU to use? and what do you all think about the ignition amplifier? (worth it or not?) thanks you all