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Can you spin a 122 to fast

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Old 11-09-2011, 05:00 PM
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I think Joe was making 18lbs of boost with a jackshaft 122 spinning the bejesus out of it on a 370cid LS2 and made alot of power! If you do a search on leftcoast 32 you can see his old setup; hope that helps!

Last edited by moregrip; 11-09-2011 at 05:11 PM.
Old 11-09-2011, 05:11 PM
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I think you've either got belt slippage or bypass valve issues.
Old 11-09-2011, 08:01 PM
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Well the one good part is I am running to fast now so when I do find the problem I will just have to slow it even more, No way can you or would you want to put a roll bar in a SSR
Old 11-09-2011, 08:15 PM
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Originally Posted by moregrip
I think Joe was making 18lbs of boost with a jackshaft 122 spinning the bejesus out of it on a 370cid LS2 and made alot of power! If you do a search on leftcoast 32 you can see his old setup; hope that helps!
But the static CR, heads, cam, etc will all dictate how much boost it can/will make.
Old 11-09-2011, 08:17 PM
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Originally Posted by BlownChevy
A little more information would help, engine displacement, etc, etc.

some of what Pocket says will be your limitations....however he cannot make an informed statement without some facts first.
He asked a general question and got a general answer. No way anyone could say you problem is X just by his first post

Still dont know what kit it is, drive type, engine, etc
Old 11-09-2011, 08:50 PM
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Originally Posted by Pocket
He asked a general question and got a general answer. No way anyone could say you problem is X just by his first post

Still dont know what kit it is, drive type, engine, etc
It's obviously a front inlet rear drive. He already said 1:1 pulleys on the rear and 373 ci. Depending where you're shifting and crank pulley size, which ati generally is 7.53 with 2.6 pulley if you shift at 6k your blower rpm is 17376. I've heard 18k is the limit.
Old 11-09-2011, 09:53 PM
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Crank pulley pinned?

Have you had it on a dyno or at the track?
Old 11-10-2011, 09:34 AM
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Yes the crank pulley is pinned and have had it on a dyno and the track for a few 100 passes, Sorry if that wasn't enough info but if it wasn't I don't think you could help much anyway, On the dyno the hp come on fast, I shift 6600-7,000, The hp dropped 50 hp at 6,000 rpm's, I think belt slip but the tuner said I was over spinning the turbo and needed a screen in my tb so we don't see eye to eye on everything but he is a good tuner, Would hit 589 hp and then drop on pump gas never tried the alky, The Ati is not over or under driven
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