The reason for a full ecu/wiring harness/Engine swap vs. 3.0 timing
10-28-2012, 03:45 PM
#1
The reason for a full ecu/wiring harness/Engine swap vs. 3.0 timing
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:
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:
10-28-2012, 04:38 PM
#3
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.
10-28-2012, 05:30 PM
#7
Mine are supposed to be 440. They are being flowtested because of the issue I had with the flooding.
10-28-2012, 05:36 PM
#8
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.
10-28-2012, 05:48 PM
#9
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.
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 $$$$ it takes to do the swap the way I am doing?
10-28-2012, 05:56 PM
#11
Thanks man, I appreciate the advice.
I have since solved the question of 440 injectors being too big to run without some sort of controll, that is what the rest of the 2004 engine + ecu + wiring harness + uprev ecu flash is for, I do believe that will solve the problem of the flooding. I was wondering if anyone has done a 3.5 swap with the 3.0 timing/ecu and upgraded the injectors, and if so, how was this accomplished, I tried messing with the fuel pressure regulator, and that obviously didint work.
SO suratt, is there a way to do this without spending the $$$$ it takes to do the swap the way I am doing?
I have since solved the question of 440 injectors being too big to run without some sort of controll, that is what the rest of the 2004 engine + ecu + wiring harness + uprev ecu flash is for, I do believe that will solve the problem of the flooding. I was wondering if anyone has done a 3.5 swap with the 3.0 timing/ecu and upgraded the injectors, and if so, how was this accomplished, I tried messing with the fuel pressure regulator, and that obviously didint work.
SO suratt, is there a way to do this without spending the $$$$ it takes to do the swap the way I am doing?
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
Last edited by SurraTT; 10-28-2012 at 05:59 PM.
10-28-2012, 05:58 PM
#12
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?
Last edited by litch; 10-28-2012 at 06:03 PM.
10-28-2012, 06:10 PM
#13
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
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 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.
10-28-2012, 10:45 PM
#16
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
http://forums.maxima.org/7390862-post2.html
10-29-2012, 05:14 PM
#18
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.
10-30-2012, 08:10 AM
#19
*logs off*
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