Quote:
Originally Posted by tc
BS - they both make x psi boost over ambient.
The supercharger is controlled by the size of the pulley and the turbo by the wastegate, both of which are easily adjustable for altitude compensation.
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Hmm,I'm going by what I made at sea level in Texas which was 19psi and i made that at 5800ft with zero changes but I did lose about a half second in the 1/4 mile. My friend on the other hand was making 7psi of boost at the same track same day in Texas with his SC'd Integra Type R but at our home track it wouldn't make any more than 4psi since the motor had less oxygen to play with.
Now I could just adjust the boost controller for more boost but I was pushing my fuel system anyway but up here I had a little more margin for error. My friend on the other hand would've had to change the pulley which was just more money and time with changing it.
I had a datalogger and just tuned my AFC for zero knock and maximum timing advance during WOT runs.
Quote:^^ I have to agree with you on this one, a supercharger is just as adjustable as a turbo, if not more (a turbo can only spin as fast as the exhaust going through it)
I can turn by turbo down to stock boost for emossions testing and then leave the place and pump it back up to 16psi for the street and then 19psi for the track in a matter of seconds and if I had a Electronic controller I'd never even leave the driver's seat.
And a SC is limited to how fast the engine is turning but you can adjust a $50 manual boost controller to make any possible boost the engine and fuel system can handle. You don't need more exhaust to create more boost,you just need a larger wastegate and keeping it closed will create alot of boost if the turbo is big enough. Of course the better flowing the engine can create better flow but with most stock cars a basic turbo setup will be enough to blow up your motor,at least a SC can't accidently get boost creep ( Wastegate not big enough to evacuate exhaust fast enough) and blow your motor up.
It's been awhile removed from a turbo car so I might have left a few key points out but feel free to get me up to date if I'm wrong as I'm not trying to be a know it all.