944S2 Restrictor
#31396 from KEVIN Patterson · Rule change · TB 21-12 (2021-12 Fastrack)
In EP Spec Lines, Porsche 944S2 (89-91), change Notes as follows:
"Comp. Ratio limited to 12.0:1, Valve lift limited to .500”, Dry sump is allowed. 56mm Flat Plate Intake Restrictor is required. In
order to facilitate the installation of the FPR, additional spacers/plates may be added to convert the mating area of the throttle
body and the intake manifold into a flat surface. These pieces must maintain the stock 60mm throttle body bore, the FPR must be
a separate piece that can be independently removed and measured, and the total thickness of all pieces (including the FPR)
cannot add up to more than 1” in thickness. Can use the stock fuel tank if stock rear bumper and bumper support structure
retained."