i think that general consensus is that we run 10.5 psi max.....the second question is a bit difficult to answer, and many ppl have different thoughts as to what they think the supercharger is capable of....
i think with a 15% reduction, the sc is still efficient, but also it depends on what sort of driving you do to decide on what pulley you want....
not many ppl upgrade to a larger supercharger, some ppl port and polish the standard Eaton M45....
Alta CAI, MTH, OBX + One-ball, Alta Diverter w/ Sprayer, Recalibrated BPV, Alta 17% Pulley, Denso IK22s, Goodyear Eagle F1 GSD3s 215/40/17, Whiteline 20mm Adjustable Rear Swaybar, Ferodo DS2500s, Motul RB600, TCE SS braided brake lines
I am no expert - but according to WEB motorsports the stock boost is about 10-11 PSI. Web has tested the SC with BMW and they say the it is ok up to about 14-15PSI ( 15% pully ) any more than that and it becomes inefficent and generates to much heat. There are ways around those problems - if you invest the time and money. I have seen up to 19% pullys in daily use with little or no problems. There are several members of our local MINI club that have the dual charged ( turbo & super charger ) engines - they are AWESOME
How fast do you want to go? how much money do want to spend??
Can anyone throw any light on the maximum rpm the Eaton supercharger can safely handle ? I'm using one on a 1.8 litre motor , aiming to achieve round the 14-15psi mark, and want to make sure I'm not spinning it too fast.
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