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Fast 90 or 92?

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Old Jun 7, 2009 | 02:02 AM
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Question Fast 90 or 92?

Hey, Im currently building up my 2000 Z28. I plan on staying N/A, Im going with trick flow heads, and the 228R cam, as or right now I plan on staying with the stock displacement. whats better a 90/90 (ported?) or a 92/92 (ported?) for my application? thanks
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Old Jun 7, 2009 | 02:36 AM
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well if u want a 90/90 u will have to find it in the classifieds cause they are not made anymore but i would have to say like a 96/96 combo from vengeance
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Old Jun 7, 2009 | 02:39 AM
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a stock 90/90 will be plenty for your cam..

if you want room to grow (larger cam) then go with a stock 92..

a ported 90 is better than a stock 92... ported 92 is obviously better than a ported 90..


that cam wont need to breath enough for a ported 90 though IMO... max i could see is 3-4 hp.... not worth the 300 bucks to me..
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Old Jun 7, 2009 | 03:11 AM
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I'm gonna get a 96/96 from vengeance with my little 224R cam

wonder what kinda gains I'll see... I plan on upgrading the cam though
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Old Jun 7, 2009 | 03:18 AM
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man i thought i was the only one on ls1 tech right now lol
but time for me to pass out lol

ya i read some where even if the heads flow 300+cfm the fast can still barely flow that so 90/90 should be good
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Old Jun 7, 2009 | 05:40 AM
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id go 90/90
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Old Jun 7, 2009 | 08:44 AM
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90/90 just cause you can find a used one for some decent coin. Not like the 92 is THAT much overkill for your setup, cause it would work fine, but why drop that much on a new intake when a used 90 will be suffiecent.
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Old Jun 7, 2009 | 10:08 AM
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Id look for a 92 used or if you have the coin the 96/96 is a nice combo.

The 92s had some better features than the 90 like threaded bosses in the throttle body bolt holes. Not a big difference but something to keep in mind.
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Old Jun 11, 2009 | 07:03 AM
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Originally Posted by MrElectric03
Id look for a 92 used or if you have the coin the 96/96 is a nice combo.

The 92s had some better features than the 90 like threaded bosses in the throttle body bolt holes. Not a big difference but something to keep in mind.
thanks, I did remember that 92's had threaded bosses...etc. I apreciate the help guys!
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Old Jun 11, 2009 | 07:10 AM
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hey I just searched vengance and all I saw was the 92, and 102mm intakes. Im sure that 102 is a bit too much for what Im doing.
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Old Jun 11, 2009 | 10:03 AM
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I'm pretty sure that the 102 is designed for LS2 heads.

Just remember that if you buy a 92mm, you can not send it to Vengeance to have it ported.
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Old Jun 11, 2009 | 05:17 PM
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Originally Posted by Spd-Kilz
I'm pretty sure that the 102 is designed for LS2 heads.

Just remember that if you buy a 92mm, you can not send it to Vengeance to have it ported.
why not?
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Old Jun 11, 2009 | 06:40 PM
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Originally Posted by Spd-Kilz
I'm pretty sure that the 102 is designed for LS2 heads.
It is not, its for LS7 and L92/LS3 heads.
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Old Jun 11, 2009 | 09:30 PM
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has anyone seen results from the 96 setup before they recommend it over a 90 or 92...i would get the 90 because it can be had for cheaper...the opening on the 90 can be taken to 92 easily with plenty of material left...it is just marketing
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Old Jun 11, 2009 | 10:36 PM
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92 buddy
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Old Jun 11, 2009 | 11:54 PM
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Originally Posted by SweetS10V8
It is not, its for LS7 and L92/LS3 heads.
Thank you! I was never sure!
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Old Jun 12, 2009 | 07:11 PM
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Originally Posted by SweetS10V8
It is not, its for LS7 and L92/LS3 heads.

Yep. Can't wait to see what L92's can do now with a decent IM.
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