Here is what I have found with my car;

The car was swapped using the cam adapters, I upgraded the injectors and fuel pump and I started to have problems with it flooding the cylinders, IMAGINE THAT!!!! Thing ran super rich. I tried messing with the fuel pressure regulator to get the mix right but ended up flooding and having to dry spark plugs every time I cranked it. This is when I took it to a shop to have it worked on, I am not in the same league as that problem


This is where the question arose, since there was no fuel management system, the answer that I got was to swap the whole engine, and run uprev osirus flash. IS THERE ANOTHER WAY DO SOLVE THE FLOODING PROBLEM? I am already comitted to the full swap, but I am curious if anyone else has had this issue and solved it a different way?


The solution:

 

Why did you swap in larger injectors and a higher flow pump? Let's start with that.

 

At the time, because I was doing an all engine build, and I had done the Airflow side of the equation, minus a intake manifold. If you are asking if I planned to go turbo, the answer is no.

 

What do you mean by airflow side, did you swap the Maf as well?

 

You can see the new maf on the ram air intake. Airflow side = Intake, headers, exhaust.

 

so what size injectors do you have? Any larger then stock 350Z injectors will make your car run insane rich without a AFC or some way to tune AF

 

Stock 350z = 220ish right?

Mine are supposed to be 440. They are being flowtested because of the issue I had with the flooding.

 

350z are 335 or close to that,

stock fwd 3.5 is 315,

im not exact on the numbers



if you are running 440's with no fuel adjustment your car will not even run due to WAY TO RICH.


thats totally insane to run that large of a injector with no adjustments.




edit , put stock injectors in, drive the car some, do a compression test, and leak down test.

 

Thanks man, I appreciate the advice.


I have since solved the question of 440 injectors being too big to run without some sort of controll, that is what the rest of the 2004 engine + ecu + wiring harness + uprev ecu flash is for, I do believe that will solve the problem of the flooding. I was wondering if anyone has done a 3.5 swap with the 3.0 timing/ecu and upgraded the injectors, and if so, how was this accomplished, I tried messing with the fuel pressure regulator, and that obviously didint work.

SO suratt, is there a way to do this without spending the $$$$ it takes to do the swap the way I am doing?

 

Do you have the stock injectors? If so, why don't you run those for now?

 

Yeah man, pretty much any injector thats bigger wont work without some adjustment. Most of these VQ's run on the rich side at WOT anyway.


Honestly man its a total waste to run a 04 ecu with osiris just to tune for 440 injectors. itll be a million times easier to run a AFC or EMU on your current 3.0 timed setup.



edit, if your a VQ35 with 3.0 timing you dont even really need larger injectors anyway, long as your N/A


The VQ needs larger then stock injectors at 280WHP+ N/A Unless you plan to put more power then that down, just install stock injectors and be done lol

 

Yeah man, I still have the stock injectors, but I am pretty sure my new setup can handle the bigger ones,

what I am asking is: WITH THE 3.0 timing on a 3.5 swap w/ upgraded injectors is there a way to get it to run with them?

edit: IE messing with the MAF? or is the only way to get the equation right with a ecu mod like uprev, haltech, or a standalone?

 

Yeah thats kinda what I thought, and my goal with the car is to be n/a at 350+ so the uprev is a doorway if you will for that goal. I *should* be getting it dyno tuned before the holidays, and I am pretty sure it is going to break 280 already, so the bigger injectors are warranted there.

But this is the first step my friend, next year its intake manifold, throttle bodies and cams.

 

Running a BBMAF and large injectors without any way to tune is just asking for trouble.

Why not run an emanage ultimate?

 

I am unfamiliar with emanage ultimate. Is it compairable to uprev?

 

Its similar. Its a piggyback ecu that can adjust fuel, timing and whatnot. Its one of the few capable options for an engine running 3.0 timing.

http://forums.maxima.org/7390862-post2.html

 

 

checked out the emanage, and I still am going to go with uprev, I am going to get away from the 3.0 timing and ecu and I will be interested to see how much whp it actually makes with the full swap and a good tune.

 

*logs off*