WTF is going on with my car.

[06blackg85ss]

Well was tuning tonight to break my last record on the dyno, things were going good til I saw this.
2nd gear pull (note 60lb injectors)


3rd gear pull... just leans the fuck out, but no knock for some reason
(mind you this is all on pump gas, no meth)


I am thinking I ran smack into a wall, aka the limits of the stock fuel system here.

I can send the files of the runs (with more data of course) to those that can help cause I've tried everything, and I"m stumped

[06blackg85ss]

anyone have an ideas?

[04Redline]

To me it looks like your injectors are starting to go static, after the huge surge in second gear, you shifted so it fell back out, but when you got back in it in 3rd gear, looks like the injectors got pissed off and starting spraying sparratically.
Or, you lost traction on the dyno, lol.
Maybe a stuck injector?
Maybe you need to go thru with the return fuel system and tune the right way, with the correct injectors, lol. I happen to have a 2.2 ecotec fuel rail with your name on it.

[06blackg85ss]

I will take you up on that. Car's actually going into my friends shop next week to rip out all the stock fuel components... But I need to get the car to run bigger injectors somehow, cause these aren't gonna cut it.
and that was a run on the street last night. It's either that, or clutch is slipping in 3rd. but just trying to keep the car on the road is hard enough so I really can't tell. NEed to do some runs with a calculated load pid seutp.

[04Redline]

Well if you do a return system, the 60 lbers will be all the fueling you will need, im very sure of this. And i wouldnt put it past me if it was your clutch either, that damn stocker put up a damn good fight, lol. But most def, just lemme know when you want that fuel rail and its yours.
pretty much just gonna need some new fuel line, another inline filter, a walbro 255 fuel pump, and tap the opposing end of the fuel log. then find a nice way to run everything and it should be set, well hell, i think no remorse had made one for his car, might wanna look into that.
also bill hahn had done something like that as well for one of his turbo ecotec cobalts. Its on the shortbuss.

[04Redline]

you think hes running past what the map sensor can see too?

[06blackg85ss]

that could be it too, but it holds an afr in 2nd gear. I dunno. I will need that rail asap. pm pricing details and whatnot.
I'm gonna play with the car more tonight and turn the boost down and see what happens. I still can't tell if it's the clutch though, I mean it will chirp 3rd gear if I wot, so it's still grips hard. But it definitely could be the issue

[fullthrottle]

Originally Posted by 06blackg85ss

Well was tuning tonight to break my last record on the dyno, things were going good til I saw this.
2nd gear pull (note 60lb injectors)


3rd gear pull... just leans the fuck out, but no knock for some reason
(mind you this is all on pump gas, no meth)


I am thinking I ran smack into a wall, aka the limits of the stock fuel system here.

I can send the files of the runs (with more data of course) to those that can help cause I've tried everything, and I"m stumped

Paul its time for a walboro or two. and or Standalone engine maagement. for now you should try a boost a pump. it cant get any worse. look at my thread its title is something to the effect of "i think im going to need larger injectors then the 60s"

[fullthrottle]

Originally Posted by 04Redline

Well if you do a return system, the 60 lbers will be all the fueling you will need, im very sure of this. And i wouldnt put it past me if it was your clutch either, that damn stocker put up a damn good fight, lol. But most def, just lemme know when you want that fuel rail and its yours.
pretty much just gonna need some new fuel line, another inline filter, a walbro 255 fuel pump, and tap the opposing end of the fuel log. then find a nice way to run everything and it should be set, well hell, i think no remorse had made one for his car, might wanna look into that.
also bill hahn had done something like that as well for one of his turbo ecotec cobalts. Its on the shortbuss.

agreed.........

[06blackg85ss]

return system should be done in the next week or so, so after the dyno tomorrow, dialing it back down to @18psi