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Old 06-26-2012, 02:05 PM   #21
RoketRdr's Avatar
Drives: 2010 Duramax; 2012 CTS-V Coupe
Join Date: Apr 2012
Location: Houston, Tx
Posts: 387
Originally Posted by radz28 View Post
Cool. Thank you for the comments. I haven't been able to really track the psi from a lot of these builds. I didn't really think that little 1900 was going to get too much past 750 horse', but there's a non-sponsor I've been watching from time-to-time saying they've got a 19-psi package. That is pretty much an entirely new long block package but I know I'd never need to get near that anyways.

I'm a little worried about such a small upper; won't slip become an issue? I haven't really researched a 10-rib swap or anything, or even know if one is available. I was just thinking to keep slip a minimum, that I'd go a 2.55-upper and the 9.5-inch lower. I think Metco makes a kit, too; I just haven't checked. D3 has some great V' parts, but, they're not a sponsor, so you won't see me saying that company much. It looks like I have more research D
Yes slip will become an issue which is why I would never go below 2.5" on an upper pulley. But Metco makes a really nice tensioner system for the LSA that deals with this problem and you could also go to a 10-rib system but I don't think its necessary. And you might want to go with a 9.1 lower because the 2.55" upper with 9.55 lower will give you right at 17psi. A 2.55" upper with 9.1" lower will be just over 15psi.
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