I got the 2.62: pulley on http://forums.maxima.org/showthread.php?threadid=136073

Next off will be a full 3" custom exhaust system, then maybe an air to water intercooler. If the motor is still alive after that stuff maybe some internals of a 3.5L. Yea 550bhp should be plenty, LOL!!!

 

Duuueerr..... I should have thought of this before. Matt, forget about what I said earlier about rewiring. ALL you have to do is use a piece of 4" PVC pipe for your MAF. Simply cut a hole and flat to mount the MAF probe. You'll then have a 4" MAF that flows alot more and will register less air across the probe (becasue of lower air velocity). That will effectively reduce the duty cycle on your injectors and allow you to increase your fuel pressure back to normal levels. I however am not quite sure how this will effect ignition timing. If it doesn't stay the same it will be slightly retarded more. I suppose you could use that to your advantage as well. I'll do this trick tomorrow or sometime this week and let ya know how it works out.

 

G-Force NA ECU runs good with 370cc injectors
http://forums.maxima.org/showthread....82#post1257082

 

So to summarize your experience with 370cc injectors:

(1) You install them. Direct replacement w/ no modifications.
(2) You take your Adjustable FPR & tune the base static fuel pressure to 20 psi.
(3) Fuel atomization issues, however, the ECU just "learns" the new injectors & reduces the duty cycle, whereby reducing the fuel flow at the same static pressure.
(4) The stock ECU just continues to learn the new injectors and you keep bumping up the static fuel (idle) pressure until you reach reasonable levels of 27-30 psi.
(5) For boost, you swap the 3:1 FMU disk and that takes care of fuel pressure needs up to 12 psi boost.

I make it sound simple, however, I'm trying to summarize.
With your 3:1 disk, you should see maximum fuel pressure of:
(12 x 3) + 43.5 = 79.5 psi fuel pressure???

Thanks.

 

Yeah when I ordered my 370cc from Avalon took forever and they forgot the lower rings another headache.good news for 3rd gens also bolts right up to our injector rails.Jim Wolf suggested that I wouldnt need a ajustable regulator does this sound right?I have the GSS341 walbro high pressure will the ecu control all this with out touching the fuel regulator?

 

check your PMs bud, I have all the timer info, its really easy!

 

That about it.

Fuel pressure is ~25psi at idle

the formula is
(Base fp/2)+(FMU ratio*Boost PSI)=Max WOT FP
(25/2)+(3*12)=48.5
(25/2)+(4*12)=60.5

I am running the 4:1 now until I find the time to check the AFR on a dyno with wide band O2. I have run the 3:1 and it seemed to run fine, but better safe than sorry.

 

Would you happen to know, from your research, what kind (from what car) of 370cc injectors will fit on the 5th gens? That fuel pressure looks nice.

 

2k2's are LS1 style, I'm not sure if 2k-2k1's are the same.

 

How is easily is the car starting? I'm surprised that it's not "flooding" when the larger injector is max opened during startup.

Also, is there any way to tell if your getting decent atomization at 25psi for idle to stock 34psi?

Thanks.

 

Guess I'll need to research. Thanks!

 

What FMU do you have? I'm guessing the SFMU from Vortech. I ask because I have the 370 inj. as well but I didn't worry about it with the Haltech. Went back to using the ecu and it runs like crap. So I got the SAFC already and looking to replace the FMU I have because I think the one I have may have gone screwy. Oh and what did you use for the connector that replaces the stock fpr?

Thanks in advance!!

 

You tried the 370cc's with the stock FPR?

If so that sounds like your problem. You can lower your base fuel pressure with the stock FPR. You either need vortech's SFMU or an adjustable FPR.

 

Yea I'm buying the Cartech or something similar today. I found a connector to replace the stock FPR but JUN USA closed so I don't think I can get it now. So I'm not sure what I'll need to do to make a connector from the fuel rail to the FMU.
http://www.junauto.co.jp/products/en.../index.html?en

 

The Cartech won't do what you want. It can't lower base fuel pressure. You either need to buy a adjustable FPR and a Cartech, or just a Vortech SFMU, which will do both.

 

Really because quite a few people have mentioned that the Cartech will set the base fuel pres and has adj for boost. I'll see if I can get some notes.

 

From what I recall, the Cartech can set the high fuel pressure (0 manifold pressure) and then raise pressure with boost. I didn't think it could do the base idle pressure though.


From: http://forums.maxima.org/showthread....hlight=cartech

Read Matt's post: http://forums.maxima.org/showpost.ph...5&postcount=14

 

Hmm I thought if I removed the factory FPR the Cartech could lower the idle pressure.

Here's the link to the other CARTECH looking FMU. bottom of page.http://www.eiptuning.com/eip03webfol...egulators.html

BILLET FUEL PRESSURE REGULATOR 12:1 ROR
This FPR is made from billet aluminum and cnc machined. It is fully adjustable and boost sensitive. Fuel adjustment is possible for base as well as the rate at which fuel pressure increases proportionally to boost input. Adjustable from 1:1 all the way to 12:1 rate of rise. This adjustability means flexibility for various applications. Includes a new high quality stainless steel mounting bracket. $189.00