88mm supercharger pulley

Jinxx · 03-08-2016, 03:29 PM

Quote:

Originally Posted by theDreamer

Not exactly, the stage 1 SC by GTM has a pretty terrible intake design.
There are 2 intake filters with a sharp bend along with a couple other 90+ turns before hitting the SC unit. It ended up restricting even the smallest pulley from going over 8PSI because of airflow restrictions.

And actually, the 1st design which I had we were topping out at 6-6.5PSI and they made some quick changes and sent out a new piece and we finally hit 8PSI.

Even still ....with intake restriction I can see the boost not going past a certain point ...but the supercharger is still spinning with rpm wouldn't it be still overspinning well over the maximum for the supercharger and running the risk of damaging the charger ?

pokeyl · 03-08-2016, 03:56 PM

I found Rotrex compressor maps as high as 115K for compressor speed still in the 65% or better range at our air flow, 38-81 compressor.

Jinxx · 03-08-2016, 04:08 PM

Quote:

Originally Posted by pokeyl

I found Rotrex compressor maps as high as 115K for compressor speed still in the 65% or better range at our air flow, 38-81 compressor.

I don't know how to read them ...but from the rotrex website they all say 90k is max for them ...so I was using that as a reference for overspinning....I like the idea of boost sooner in rpm range as I don't like to redline the car .....was wanting to try to balance the pulley size to have maximum effiecincy of charger around 6800 rpm ......so I'm not sure which pulley size would be best or what the negative issues it would cause.

03-08-2016, 03:56 PM	#2 (permalink)
pokeyl Track Member Join Date: Nov 2010 Location: DFS Posts: 900 Drives: ??? Rep Power: 55	I found Rotrex compressor maps as high as 115K for compressor speed still in the 65% or better range at our air flow, 38-81 compressor. __________________ It's not my fault I'm old, I was born a very long time ago!

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