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Throttle body for FAST 92 intake???

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Old Jan 28, 2014 | 11:10 AM
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Default Throttle body for FAST 92 intake???

I'm getting ready to put a FAST 92 intake along with 39lb injectors. I have a few questions. I'm trying to decide between an aftermarket 90mm tb or an LS2 tb with adapter harness. I'm wondering if anyone has any recommendations of one over the other. Also, I've seen a used Lingenfelter 90mm for sale at what I think is a pretty good price, but from the pics it looks to have two places on the left hand side to bolt it on, one place on the right(bottom corner), and one place in the top center. Will this fit right onto a FAST intake? I know on the LS2 tb it has 2 holes in each side(top and bottom corners). Thanks in advance for any help
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Old Jan 28, 2014 | 03:00 PM
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Originally Posted by ghostrider98
I'm getting ready to put a FAST 92 intake along with 39lb injectors. I have a few questions. I'm trying to decide between an aftermarket 90mm tb or an LS2 tb with adapter harness. I'm wondering if anyone has any recommendations of one over the other. Also, I've seen a used Lingenfelter 90mm for sale at what I think is a pretty good price, but from the pics it looks to have two places on the left hand side to bolt it on, one place on the right(bottom corner), and one place in the top center. Will this fit right onto a FAST intake? I know on the LS2 tb it has 2 holes in each side(top and bottom corners). Thanks in advance for any help
FAST manifolds are for 4-bolt TBs, so a 3-bolt will not work. I would recommend using a LS2 TB (silver blade) with the appropriate Racetronix plug-n-play adapter harness.

Btw, remember: some of the ads for aftermarket TBs are for cable operated vehicles, not drive-by-wire TBs that the Vette uses. Just keep that in mind when shopping around.
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Old Jan 29, 2014 | 02:38 AM
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You might want to go with a Nick Williams 92mm throttle body. It will use your electronics without any adapting.
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Old Jan 29, 2014 | 04:16 PM
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I ported my own LS2 TB for my home ported FAST 90. It worked great!

If you use a LS2 TB, you will not be loosing anything! A nice ported LS2 works fantastic!

What engine mods are you running. I have a home ported FAST 90 / ported 90mm LS2 TB, heads, cam, headers, vararam LS6 with 42 lb/hr injectors and it supports 450 RWHP.

Bill
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Old Jan 29, 2014 | 04:39 PM
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Originally Posted by Bill Curlee
I ported my own LS2 TB for my home ported FAST 90. It worked great!

If you use a LS2 TB, you will not be loosing anything! A nice ported LS2 works fantastic!

What engine mods are you running. I have a home ported FAST 90 / ported 90mm LS2 TB, heads, cam, headers, vararam LS6 with 42 lb/hr injectors and it supports 450 RWHP.

Bill
I appreciate the advice. I've decided to go with the LS2 tb. So far I've got Kooks headers/xpipe and Borla Stingers, Blackwing filter w/ Granatelli air bridge, and am in the process of putting in a Lingenfelter cam w/ new springs, the FAST 92 intake w/ LS2 tb and 39lb injectors. Once I get everything installed it will be professionally tuned. Hoping to get somewhere in the neighborhood of 440 hp at the wheels.
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