Originally Posted by
Vigo
I am still planning to build a modified VNT setup, so i am all for this thread.
However, i disagree that the stock intercooler is the main sticking point. I believe that the main reason VNTs are not modified or are swapped out for something more easily modified is due to the lack of adequate boost control from the vanes only. In my opinion, the thing the VNT needs most is a wastegate. Once it has that and be turned up slowly and tuned for carefully, its limits can be explored more often, such as Turboshelbys did with his 13-second CSX. Noone is really taking the chance of installing an upgraded compressor that could boost spike into the 20s or even 30s psi without having solid boost control, and the lack of that is what keeps VNTs either stock, or on the shelf collecting dust.