Surging 1.4 turbo Cruze

[SilveradoNut]

I have a 2011 Chevy Cruze with 1.4 turbo. I recently decided to bite the bullet and put a ZZ performance 3.1 big wheel turbo, 42lb fuel injectors, Complete ZZ exhaust system, timing chain, replaced cylinder head. I have paid ZZ performance (turbo Tim) for a tune for my car. He originally gave me a tune file that was OK but had some bugs. He then sent me another tune file and after I wrote it in the car runs like S---. Anyway he keeps blaming my car for low boost after 2nd and 3rd write ins and basically told me to pound dirt. I put his original file in and the car is drivable with over 22lbs of boost, but has a bad surge (like wastegate) under mid throttle. I have put my log file in, if someone could point me in the right direction would be appreciated. I have done a little bit of tune myself(not a master) in the past just not on this car. Thanks to all

[黄永福]

I have a 2011 Chevy Cruze with 1.4 turbo. I recently decided to bite the bullet and put a ZZ performance 3.1 big wheel turbo, 42lb fuel injectors, Complete ZZ exhaust system, timing chain, replaced cylinder head. I have paid ZZ performance (turbo Tim) for a tune for my car. He originally gave me a tune file that was OK but had some bugs. He then sent me another tune file and after I wrote it in the car runs like S---. Anyway he keeps blaming my car for low boost after 2nd and 3rd write ins and basically told me to pound dirt. I put his original file in and the car is drivable with over 22lbs of boost, but has a bad surge (like wastegate) under mid throttle. I have put my log file in, if someone could point me in the right direction would be appreciated. I have done a little bit of tune myself(not a master) in the past just not on this car. Thanks to all

Contact my email [email protected]

[Oldsguru79]

Same boat here, I also got the ZZP 3.1 Turbo, full exhaust, cam, springs retainers, diamond pistons, ported intake, 42lb injectors. He has sent me probably 10 tunes and it doesn't run like I think it should. After ZZP warrantied the turbo that failed during his tuning. I gave up on having him tune it. I noticed this is an old post, did you get it running good?

[ChvyTchJff]

Same boat here, zzp big turbo (with the upgraded spring they suggest), their green injectors, zzp tune by tim (wasn't a pleasant experience), the pcv mod. New gm valve cover.
Power has always been erratic and it has a severe surge....he re-tuned 3 total times and then just quit responding to emails like he was done with me (total time from start of tune to 3 emailed files was maybe 2 hours)
Very disappointed for the price

29 year GM master tech, I got their tune because I assumed they would know what they're doing....

2015 Sonic RS automatic

[rgarza38]

Same boat here. I have a v3, one of the first ones, aside from the bpv whistling, the turbo has always been surging too.

[TheBlack7]

2 things to try

1. turbocharger base dc table too aggressive in medium load cells causing boost overshoot
2. driver demand table has harsh transitions, needs smoothed out

[rgarza38]

Thanks for the info.