Mini Cooper S Supercharger

[NoHachi]

It isn't quite as easy as just fabbing up some brackets and a manifold.
Supercharger systems are extremely sensitive to pulley allignment. Get that wrong and you create a world of trouble for yourself. Don't forget that the forces on the belt and pullies ramp up to several horsepower.

The extra force on the engine should be negligable...nowhere near the extra force that you would experience from for example 1000rpm more. Your biggest problem will be heatmanagement and the associated knock/detonation. What u see a lot is that supercharged system tend to heatsoak on hot days, during congested traffic conditions. Cooling of the engine and the intakecharge needs to be excellent.

You could try and run the stock ae86 map system alongside a larger injector that injects fuel under boost, before the compressor. U usually get better atomisation and some cooling of the compressor. This at the expense of increased wall-wetting.
Be VERY carefull about running superchargers along with wilder cams. Though turbo systems seem to react well to this kind of mod (forget the whole blowby bla bla, high rpm efficiency equalls HP, no matter what the pressure differential is), superchargers don't like it.
Any sign of low rpm backfires etc and you get interesting effects. The pressure in the mani increases tremendously and (due to the compact design) has nowhere to go/expand...most parts don't like that...used to blow up 2 carbon fibre intake manifolds a night before we got the mapping where it wouldn't act like a handgrenade..