Shoaf85

iTrader: (9)

I just installed the 2 step on my camaro. Right now it is a stock short block with a 76mm turbo. Whenever I engage the 2step it starts to backfire but only when I got to 100% throttle, which is about the only way to build any boost at all. Around 1/2-3/4 throttle it doesn't backfire at all. I do not have any timing being pulled right now and was just wondering if anyone else had any experince! I know this is what anti lag is supposed to do (I came from imports) but this is extremely violent backfiring and once again I am pulling no timing!

Thanks
Stephen

93_z28

once you hit the rpm you have your 2 step set to,i dont see any reason to give it anymore gas.

Sideways240sx

iTrader: (22)

The 2 step is causing random misfires.. It is pretty rough when its active. If i remember right i have mine set around 4300 rpm, and have it pulling 8 degrees of timing, im a m6 car with a GT4276 with a big 1.12 ar, but i still make about 5 psi out of the hole. I can still leave a little harder. You should get a video, but it sounds like its working right.

Chris

TXCAMSS

iTrader: (60)

If you have it set real low,yeah it will sound like radical backfires. I do believe the instructions state the minimum rpm the 2 step will function effectively.

I tried to launch off the 2 step with a low stall conveter and no TB and it sounded like the engine was about to explode.lol. No harm, but it didn't work.

At 2500rpm with a TB is a very fluid cylinder cutting hold back that launches very nice IMO. The link in my sig is with the 2 step using the transbrake in our 4L60E. It's like a machine gun going off, but I likely

gangbang malloy

if i do recall those violent backfires are explosions happening inside the turbine side of the turbo which is normal for the 2 step and makes for killer launches, but... i have heard the turbo is worn down more with the 2 step

Shoaf85

iTrader: (9)

The rpm was set at 3500 and still backfires. I can hold the throttle a little above full throttle and it doesn't do it but in order to build good boost you have to go WOT to load the motor!
BTW mine sounds like a 50 caliber, LOL! I had people pulling over on the side of the road checking their tires and ****! I hope it doesn't blow my exhaust off!

SuperSlow02

iTrader: (16)

No turbo here but mine is fairly violent, scares those honda boys

koolrayz

iTrader: (26)

It only doing it at WOT makes me think it does it is going rich at the transition from closed loop to open loop. What does the wideband read? you may have to adjust the PE in that rpm range?

Shoaf85

iTrader: (9)

This was going to be my next observation. As of now the loud bangs have interrupted my train of thought on the gauges! I'm going to check the wideband on the next go around though! BTW my car is always in open loop!

code4

iTrader: (30)

mine doesn't backfire at all. do you still have cats, if so not good.

NicD

iTrader: (7)

The backfires on the 2 step are caused by the rich condition of cutting the spark on some of the cylinders and the fuel igniting on the hot parts and other exhaust gases from other cylinders on the way out. How loud and how many backfires depends on how rich you are running the car and the amount of timing in it. Turbo cars are generally going to backfire more as they tend to run richer and run less timing than an N/A setup.

Shoaf85

iTrader: (9)

No the car no longer has cats on it!

tomz28

iTrader: (20)

he is right
all turbo car i see with 2-steps backfire
that is what gets the turbos spin with no load