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Generation III Internal Engine 1997-2006 LS1 | LS6
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Old 09-01-2006, 01:10 AM
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Default Fast 90/90
how much hp gain there is from a 90mm fast intake to a ported 90mm fast intake.
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Old 09-01-2006, 01:18 AM
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Depends
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Old 09-01-2006, 01:24 AM
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Originally Posted by Lithium
Depends

depends on what???
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Old 09-01-2006, 01:31 AM
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Damn...miss read your question. My bad.

I have heard of gains up to 15 hp.
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Old 09-01-2006, 08:25 PM
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Originally Posted by c5_ls1_6spd
depends on what???
Mostly heads and other supporting mods..
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Old 09-01-2006, 09:03 PM
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i have the TSP ls6 stage 1 heads, would it be worth the time and money to port match my FAST 90 manifold?
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Old 09-01-2006, 09:13 PM
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Originally Posted by c5_ls1_6spd
i have the TSP ls6 stage 1 heads, would it be worth the time and money to port match my FAST 90 manifold?
Yeah, it would benefit you more than an un-ported intake. Just don't over-port it. If you're on a tight budget, you can always use it now and port it later when you have more $$.
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Old 09-02-2006, 12:49 AM
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i would say 15 to 20 rwhp
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Old 09-02-2006, 03:14 AM
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Originally Posted by LightEmUpLs1
i would say 15 to 20 rwhp
i already have a FAST 90 on my car and tuned....are you saying if i port my FAST and retune it, i could pick up 15-20 more rwhp? or would it be more like an additional 5-7rwhp over the unported FAST...
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Old 09-02-2006, 08:35 PM
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By the time you guy the throttle body and the FAST manifold, your half way to getting gears. Do gears and you get more of the feel of extra HP that your looking for.

10 -15 more RWHP you really wont notice
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Old 09-03-2006, 12:11 AM
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Originally Posted by c5_ls1_6spd
i already have a FAST 90 on my car and tuned....are you saying if i port my FAST and retune it, i could pick up 15-20 more rwhp? or would it be more like an additional 5-7rwhp over the unported FAST...
With proper porting You should have an extra 5-15hp through out the rpm range . Believe its refered to as ''Velocity Porting'' do a search on that word .
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