High boost?

[out there]

because he has nothing but free mods, i'm sure that it will be just fine because the ecu will be giving enough fuel. i'm guessing he is probably hitting fuel cut, but they should be able to tell because it's a lot more than "popping" at high rpms

[Jim]

if you hit fuel cut, your car hesitates and "cuts" off really bad, you'll know if it you feel it, just like the engine stops for a slight period of time.

if your popping when you stomp the gas, check your plugs and wires.

if he's got nothing but "free mods" and he's got uncontrollable boost, there's a good chance that the stock fuel system wouldnt be able to provide enough fuel, the stock intercooler would get pretty hot, and that he's picking up a fair amount of knock

[Phats]

yeah actually mine was doing a similair thing, luckily i was still tuned for about 24psi, but it being so cold i ran extremely rich, like around 9:1, and i got a fuel cut, i think it may just be a miss, simpley 'cause it can't burn it all, i'm honestly not 100% sure why i was doing it, but at least i know i wasn't leaning out (nice to have a wideband in the car) But my fix was easy, just turn down the boost, and the fuel too, and just retune in the summer.

[-GSX-Falcon]

When I had nothing but a fuel pump, a bigger turbo, stock injectors, and a boost controller, I fuel cut on cold days, a quick tune and that was all gone...

That is actually exactly what I have. I got the 450cc's (auto came with 390) But I also got a manual ECU so it has the proper fuel maps. Thinking of getting a SAFC here soon but i need to wait till summer so i can dyno tune it.

[out there]

bah, you don't need a dyno to tune such a small turbo. just a datalogger to see where you're getting knock and/or losing timing; keep your o2 nice and smooth around .88-.94, i've seen different numbers for different years, so you should ask around

[24valvenotak]

out there wrote:
bah, you don't need a dyno to tune such a small turbo. just a datalogger to see where you're getting knock and/or losing timing; keep your o2 nice and smooth around .88-.94, i've seen different numbers for different years, so you should ask around

..to do it? or to do it right?

[out there]

with the stock turbo, in my opinion, more hardware besides the datalogger isn't necessary (unless you're bringing in more complex devices than the afc