Thread: Maxed out injectors... help needed!!

Well, it isn't entirely true that 20psi on a gt35r would spin tires. It hits a lot later in the powerband than my turbo and I don't spin that bad on all-seasons. I bet 24psi on my turbo could be handled pretty well with some drag radial tires. I am at 4500ft but still, I don't see traction problems as bad as others do.

i think his car is awd it says sss on it, and it looks like it has a gtir engine and tranny transplant, idk what dif hes using but it looks awd

It is AWD... GTiR motor and gearbox + bluebird transfer case and rear diff.
(already broke bluebirds tranny)


Saludos,

i take it your running a map since i see no maf lol thought maybe your maf could've been maxing out hahaha

To the non-stock fuel pressure regulator lovers,

I have a stock FPR in my setup at the present time, and it's working just fine. Working MUCH better, than the Nismo adjustable unit I had. I'm running 740cc injectors on a 3076r, and hit about 67% duty cycle at 15~16psi. I've taken it to 30psi already (on accident) and duty cycle would only be in the 80% area.

Are you sure you're not blowing out your spark at 20psi? What are your plugs gapped to? If you were maxing out your injectors, I would think that you'd start to see a leaning trend.

I think you are right Tekkie and he might jsut be blowing out the spark. Make sure that the wires, and gapping is adequate. Also go over the whole ignition system to see if there are any loose or wore out items.

the car looks like its taking a nose dive during one of those shifts. What's happening there? is that the suspension or are you encountering some kind of boost/fuel cut?

This is your first task. What size injectors does Haltech think you have? 850cc? Are you absolutely sure? None of the other info in this thread matters. Haltech is doing the math to show you duty cycle.

Also I believe your first assumption is wrong. By my numbers I'd expect to see those injectors completely maxed out at 500-550 WHP at 3 bar base pressure and 12.2:1 AFR. You've maxed out your injectors. Sad day, but you move on.

Just go to 4bar

Well I think theres something wrong with my Walbro Fuel Pump because yesterday it started making weird noices and the car didn't pass 4500 rpm at WOT and there was a point were the Fuel Pump was completely silent and the car barely held idle....