[SOLVED] Low boost and slow spool

[Jeffry]

Checked for boost leaks now and nothing to be found... So last 2 options are the tune and the turbo. Gonna wait for the tune

 

[Jeffry]

alright he didnt want to take the risk to see if it fails cause the turbo is just acting weird so need to replace the turbo....

 

[Jeffry]

I already did a smoke test and a boost leak test and no result. I got ahold of Fux. A german tuner. He told me there is a bit of a clean up in ignition and timing and something with the AFR was not correct. He sees there is like a restrictor in the tune that may causes the slow spool and slow boost. He is adding boost and i got more boost. In the negative boost it spools up REALLY fast!! like 1 tap on the gas and im boosting. Above the that it seems its still a bit struggling... to be continued

 

[Olivier]

I already did a smoke test and a boost leak test and no result. I got ahold of Fux. A german tuner. He told me there is a bit of a clean up in ignition and timing and something with the AFR was not correct. He sees there is like a restrictor in the tune that may causes the slow spool and slow boost. He is adding boost and i got more boost. In the negative boost it spools up REALLY fast!! like 1 tap on the gas and im boosting. Above the that it seems its still a bit struggling... to be continued

Ever figure this out? Having the same issue

 

[Jeffry]

Ever figure this out? Having the same issue

Yes i figured it out! After i removed the turbo to place the cst4 i inspected the housing and it seems like the exhaust side wheel is rebuild wrongly. They put in a wheel from a BNR S4 instead of a s1. Thats how it could not boost properly.