Originally Posted by S.A.W

Ok thanks.

May I ask why you use 5.7 for 13.5 when all the files/documents are recommending around 6.25 - 7.00 ? please don't think I'm saying your setting is wrong but this is where I am getting confused with gearing it correctly and why I asked earlier if there was a suggested setting.

The manual with the motor recommends 4.8 -6.0 the SP Basic Supercharger setting PDF say's 6.25-7.0 and then the Word doc say's 6.5-7.0

I never know which to start with I presume you've tried loads of different fdr's ?

Thanks.