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  1. Engine failures from 4 Piston Racing?

    It’s not a K20C1 engine that was being used in the video, I think it’s a built K20 bottom with a K24 head from 4P. Surprised to see rockers/cams (which was previously on another built 4P engine they had, that also failed) being used for a new one.. whether it was still properly inspected prior...
  2. Full Race or XDI HPFP?

    So I just got my upgraded R660 AS today, which means I’ll need some supporting mods so I don’t stress out the fuel system for my FL5. In regard to fuel pumps, I’ve heard great things about Full Race’s new HPFP which pushes 68% more fuel compared to OEM. Probably because it also comes with a HUGE...
  3. Overshooting commanded boost targets

    I've been experiencing this problem, and I can't seem to figure out why. The car tuned to about 24 PSI target boost. When I was recording a datalog, doing a WOT pull starting at 3rd gear 2k rpm’s, all the way up to 4th gear redline, I noticed I am slightly overshooting the target when looking at...


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