Got a pic of a friend's SN89 - Which impeller does he have?

I've been meaning to get a picture of my impeller, but for now, I got a picture of my friend's impeller. It's an SN89.

www.alantripp.com/sn89.jpg

That is the generation 3 impeller which was in used in the SN89-SN92. It is a heavy casting and anything over 6psi is really not worth over spinning since it does not have enough blade curve

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Originally Posted by speedytang

That is the generation 3 impeller which was in used in the SN89-SN92. It is a heavy casting and anything over 6psi is really not worth over spinning since it does not have enough blade curve

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Thanks. Assuming mine is the same, what kind of benefits would I get from purchasing an SN2000? Craig said that it would cost $1000 for a new SN2000 ($1200 less $200 credit).

The biggest thing I'm looking for is the ability to rev as high as possible so I can use a smaller pulley but still be able to rev to 8k RPMs.