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LS3 Throttlebody will not work on C5

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Old 10-12-2010, 04:58 PM
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Default LS3 Throttlebody will not work on C5

Well, the shop is finishing up my L92/LS3 swapover on my 402 stroker. The problem we're having is, the LS3 throttlebody will not work on my C5? Yes, I have used the search and google. I'm just looking for some answers to get this project finished. Pls help..
Old 10-12-2010, 05:11 PM
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Well yes if you mean the fly by wire throttle. I understand there may be a conversion for it. But I must ask, why not use an aftermarket TB with the throttle cable. A 90 FAST TB should bolt up fine. I had one on my LS3 intake. If you mean something else then you need to provide more details.
Old 10-12-2010, 05:21 PM
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Originally Posted by RyanSws6
Well yes if you mean the fly by wire throttle. I understand there may be a conversion for it. But I must ask, why not use an aftermarket TB with the throttle cable. A 90 FAST TB should bolt up fine. I had one on my LS3 intake. If you mean something else then you need to provide more details.
Did not get an aftermarket because I got a good deal on this one when I bought the LS3 intake. I guess I'll have to find an aftermarket and sell the one I have if he can't make it work. Just trying to see what options I have before buying another tb.
Old 10-12-2010, 06:13 PM
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I just got done doing the same thing, I can show you how to make it work as far as the scaler and idle probs. but you wont be able to get rid of the tps errors. The problem is the blade opens opposite of the motor causing a tps error.

I gave up and went to an ls2 tb
Old 10-12-2010, 06:14 PM
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Use the LS2 TB. It is a diff style. The one with the "gold" plate will not work correctly on the C5 style cars as far as we know. As Mr Deviousness just pointed out.
Old 10-12-2010, 06:41 PM
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Default ls2 tb

Where can I find a ls2 tb to fit my c5/how much? Thanks..
Old 10-12-2010, 06:52 PM
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Yeah man, John and I fought this issue for a couple of nights and figured it out!
Old 10-12-2010, 07:00 PM
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Thanks guys, I thought I would be riding this week..Guess not, at least until I can get a ls2 tb.
Old 10-13-2010, 09:32 AM
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We have them on hand brand new. Price is about $315. They are kinda pricey. If you get a ported one, make sure that its not ported on the back. That will cause all sorts of problems as well. Ask me how I know.
Old 10-13-2010, 04:59 PM
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Originally Posted by John@Scoggin
We have them on hand brand new. Price is about $315. They are kinda pricey. If you get a ported one, make sure that its not ported on the back. That will cause all sorts of problems as well. Ask me how I know.
Thanks John, I'm gonna try and find a good used one first. Will I need to purchase any additional adapters to make this work?
Old 10-14-2010, 07:18 PM
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What you want to look for is a 2005 to 2008 Corvette throttle body.
Old 10-14-2010, 08:27 PM
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Does it set P1515 code and go into reduced power mode? I have a customer trying to make a 10 Camaro TB work on a 02 Vette with a Fast 102 intake and that is the problem we are having.
Old 10-15-2010, 02:52 PM
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Originally Posted by 2xLS1
Does it set P1515 code and go into reduced power mode? I have a customer trying to make a 10 Camaro TB work on a 02 Vette with a Fast 102 intake and that is the problem we are having.
Yes..
Old 10-15-2010, 02:54 PM
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I'm going with the LS2 tb. This one is suppose to work..



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