efr

  1. M

    AFR lean out at low RPM

    Hi there, I have my Silvia s15 upgrade and I have few issue with the engine at lower RPM (below 2000RPM). My car have EFR turbo kit from full race. The turbo is EFR 7163 with twin scroll manifold and direct line intercooler. I use Plazmaman plenum with 75 mm throttle body. The intake is...
  2. B

    Borg warner efr series turbo

    Hi All, Anyone on here fitted a b1 frame efr turbo either 6258, 6758 or 7163 to a sr20det engine in stock location? If so what manifold did you use? I understand there may be fitment issues depending on the manifold used. rgds Brian
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