Fast intake & throttle body
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Pro
Joined: Dec 2004
Posts: 672
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From: L. B. Ca
Fast intake & throttle body
I have a ls1 with stage 2 heads, cammed, long tubes...………..thinking about fast intake and new throttle body...……..what size throttle body....will work the best?
thanks for any imput
thanks for any imput
Zen Vet Master Level VII
Joined: Mar 2016
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From: Southlake, TX
Your factory one will work just fine. It is designed to flow very high and unless your engine will live (continuously) about 6k rpms, you will be just fine. Consider saving a few bucks for something else.
Last edited by billschroeder5842; Oct 5, 2018 at 06:38 AM.
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From: Springfield Ohio
LS1 Throttle Body next to LS2 Throttle Body
The LS1 throttle body is a three bolt design with a 78mm opening. FAST intakes require a four bolt throttle body. The LS2 throttle body is a four bolt design with a 90mm opening and will bolt right up to a FAST Intake, however, a wiring harness is required for the conversion. Cost of the wiring adapter is about $55.00. The LS2 throttle body will easily out perform the LS1 throttle body. I wouldn't do one without the other.
Last edited by tbrowne; Oct 5, 2018 at 07:40 AM. Reason: Edit wording
Safety Car
Joined: Jun 2004
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From: Stoney Creek Ontario
LS1 Throttle Body next to LS2 Throttle Body
The LS1 throttle body is a three bolt design with a 78mm opening. FAST intakes require a four bolt throttle body. The LS2 throttle body is a four bolt design with a 90mm opening and will bolt right up to a FAST Intake, however, a wiring harness is required for the conversion. Cost of the wiring adapter is about $55.00. The LS2 throttle body will easily out perform the LS1 throttle body. I wouldn't do one without the other.
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2020 Corvette of the Year Finalist (performance mods)
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you will gain some power with the fast but the final number ultimately depends on how aggressive your setup is... if you only pick up 10hp that isn't enough to feel the difference and after the cost of parts and tuning it might not be worth it... that's what happens with n/a setups though, once you get the big things out of the way (heads/cam) you end up spending lots of money for minimal gains
