My Injectors Are Maxing Out @ 100%

[Andrew.Y]

Hi everybody who has more brain than I do:

on my 34 gtr the injectors are running at a peak duty of >95%, I have even saw a 100% peak reading today followed by some burned rubber smell. Here is a couple of questions I want to ask and your feedback is greatly appreciated:

1, what is the risk of running injectors at full capacity? what problems do I most likely enter into? Will the ecu adjust air intake to compensate for the lack of fuel?

2, Do the 34gtr stock injectors have better flow patten than sard 700cc ones?

3. If i do track day, is it safe to run on the street tuned high boost, with 100 octane? if not so why and what might happen?

4. the car is pulling 288.7rwkw on a pair of -7s. If upgrade to 700cc + bosch 044 + tune where everything else untouched, will I be able to gain a significant power increase? If so how much?

apologize for my lack of essential knowledge. I guess my learning curve just started. once again really appreciate your commends.

[Sunkist]

you could blow an engine if its starving of fuel at high boost/revs.

you can get a great flow pattern it you looks for quad port injectors at 700cc. u may not gain much more power, but you will be saving your engine.

and it wouldnt be reccomended to track the car if you see the duty cycle at 100%

if you can get hold of injectors soon, I would speak to your tuner soon. until then drive carefully

Edited January 29, 2011 by AaronNM35

[paulr33]

if you go near or hit 100% duty and you still insist on a track day turn the boost down about 3 to 4psi and it should be enough to keep it under

but as others have said, if you max injectors, you risk lean out, lean out = rebuild if its bad enough

[Andrew.Y]

thank you very much guys. I have bought 700cc ones before the tune and will get them on for a retune.

[Deano 1]

yea just goto the track on low boost, you dont want to be trashing your car all day on high boost anyway, my stock gtr injectors are at 100% on high boost, but i only run 16psi at the track so they only get to 70ish....

[Moodles2]

The Nismo injectors are supposed to have the best spray patterns out of the direct bolton injectors, but my research into Sard 700s (have a pair I'm waiting to be put in) I found even with the single port people report they idle really well