Originally Posted by
ala_xfire
Why would you REDUCE the alternator pulley size ?
That would make it spin faster, requiring more power to do so and imposing extra strain on it.
Of course he was referring to UNDER-DRIVING the alternator ... but good of you to catch that
Originally Posted by
Da55id
Has anyone done a before/after dyno run on the reduced sized alternator pulley along with the better contact patch on a 65mm supercharger pulley?
While I would welcome any before/after dynos (particularly any that suggested a big gain
).. I suspect the difference would only be large in the case of a car that was slipping consistently before. Just as good as a dyno run in this case would be to compare typical boost (boost profiles under full acceleration) before and after adding the kit.
The difference to the alternator is more likely to be reflected in how fast the motor spins up (by changing the speed that this "flywheel" spins relative to engine speed) and how long the alternator lives (bearing life, etc.) neither of which will be reflected on the dyno.
hope that helps,
Chris
P.S. Any who have data they want to share .... please share