OMG.. what a story. Forget the (race
) S38 and use a good M30... even with carbs… simple and good.
Don't ask me how i know.
I drove 1 year rallys ( 2014) with a S38B38 in it but only had 280 HP and no real torque below 4000 revs…. untill we discovered we needed a signal from the rear axle that the car is running at speed.... as in the M5's.... there is a company here that makes a box that simulates this…. we tried 2 boxes, all went bad.... so no end .. got a M30 and problem free happy again for already 4 years !