The thing that sucks is that the M62 is basically maxed out as it is... it cannot support much more horsepower. Running high octane fuel and going as small as you can on the pulley will show you what the IC could do.. and I am guessing it won't be much.

PERHAPS...... research should shift towards a different power adder that you COULD fit in there.. such as an Intercooled TURBO. ?

I wish I never sold my S1 92' ssei.. this would be fun! Might have to get my hands on one and see what I can do. Something tells me turbo would be the way to go.. and someone should try the race fuel/small pulley and see what you get. The m62 will just make too much heat IMO.

BUT, best of luck in the performance advancement of this motor... might want to look into camshafts too... if some are interested enough, I might be able to have...20 grinds made.

All good points, but an intercooled turbo is out of the financial reach of the S1 owners. Again, we're back where we started. Which is why we're trying to get 'just enough' to be able to drop one more pulley size.

My SC is off the car for development right now.

The track opens in 55 more days here, I'll be trying out the 2.1" pulley + race gas idea, I can't imagine it would do a whole lot unless it'* a cool day, but I'm packing some NX just in case

hmm 2.1" pulley + n2o + PVC intake (?!) + no form of intake cooling = boom (or ALOT of KR)

nah, it should be alright. I'm only running a 35 shot. Which should cool the intake charge and add a nice boost at the same time.