Members who reacted to message #18

The 1NZFE(T) project is completed , running stock boost from a Garett AR48 turbo (suspect it might be from a S13 CA18 or SR20 turbo) at 0.68-0.82 spike on gear change (the car is a Vios 1.5 Auto)

Quite satisfied with the result , but there is a problem , after tuning even with a super rich AFR like 10-11 & retarded ignition timing , it would knock on high load condition eg.uphill / upshot on full throttle at high rpm ...

It need a thicker headgasket I bring down the compression ratio...