So i got the ss on the dyno but for whatever reason the car kept breaking up as if hitting boost cut above 5k RPMs. Car runs normal on the street. Is there anything I'm missing to turn off that's causing it?

 

Run through your tune check fuel delivery, timing and what type of fuel you’re tuned for.

 

I had a few times. After leaving there i did some pulls from 70-100 and everything was normal. No KR and was consistent 19-20psi. The dyno operator also turned off the esc before the runs. Fueling hasn't changed, running e47.

 

Did the tune modify the over rev point? I know that if you are sitting in neutral and floor it it wo=ill act that way around 5K.

 

Could you elaborate on the over rev please? Is that similar to fuel cut? I don't recall seeing it in version 4.42?

 

The red line on the tachometer, factory sets a rev limiter.

 

Sorry i should had mentioned more info, i raised the rev limiter or fuel cut off to 6900. Someone mentioned that the dyno may have a didn't lead as compared to the street and nasty had caused me to max the wg? My wg duty cycle is at 93%.

 

Uhh. Translation please.

 

Sorry, typing from a smartphone and auto correct sucks. So first, i have my fuel cutoff rpm set at 6900. The dyno operator ran the car up to about 120mph which is under 6900 rpms.

Someone on one of the hhr fb group mentioned that the issue with the boost cut on the dyno and not on the street may be because the wg is hitting its max since there is a difference on load between the two where the dyno has little load so vacuum changed.

 

That may be it.