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Drive by wire TB?

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Old May 16, 2019 | 06:59 PM
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Default Drive by wire TB?

Had to get a new intake manifold for the C5, so I opted for the FAST with a 92mm opening. I think I may have made a huge mistake! I can't find a 92mm drive by wire throttle body anywhere. Thoughts?

-Kevin
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Old May 16, 2019 | 07:39 PM
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Look for an LS2 SILVER blade 90mm TB. Then you need the conversion harness from Lingenfelter for 78mm to 90mm TB. Which FAST intake did you purchase? Also you can reuse your 78mm TB with the adapter plate from 3 bolt to 4 bolt.

Last edited by XLR8 C4; May 16, 2019 at 07:51 PM.
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Old May 16, 2019 | 07:48 PM
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https://www.amazon.com/gp/product/B000EQPBTK/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B000EQPBTK/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1
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Old May 16, 2019 | 07:50 PM
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And you will need the aforementioned adapter harness, but several vendors make it.
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Old May 16, 2019 | 08:02 PM
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you can also cut the plugs off and wire it directly into your current harness, it looks much cleaner that way imo
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Old May 17, 2019 | 08:53 PM
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@XLR8 C4
Thanks for your reply - I should have shared a little more info, I want to install a NOS wet kit that has a 92mm adapter, so I'd like to stay away from having to run two adapters because I already had to shim my power steering pump to make room for the single three bolt to four bolt adapter plate I'm currently using.

-Kevin

Last edited by El Kevin; May 17, 2019 at 08:54 PM. Reason: Adding who the quick reply is to.
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Old May 17, 2019 | 08:57 PM
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Thanks for your reply - Since I am looking to add a NOS wet kit with the 92mm adapter, I want to minimize the number of adapters I have to use because I already had to shim my power steering pump with the current set up that uses a three bolt to four bolt adapter.

-Kevin
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Old May 18, 2019 | 07:52 PM
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Frankly using a stock Tb on a Fast intake defeats the purpose of a larger intake. You have gone this far get a larger TB and the proper harness. With NOS and the Tb you will
need a tune anyway.
Good luck
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Old May 18, 2019 | 10:20 PM
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Originally Posted by XLR8 C4
Look for an LS2 SILVER blade 90mm TB. Then you need the conversion harness from Lingenfelter for 78mm to 90mm TB. Which FAST intake did you purchase? Also you can reuse your 78mm TB with the adapter plate from 3 bolt to 4 bolt.
This is the best option available.
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Old May 19, 2019 | 12:25 AM
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Originally Posted by road pilot
Frankly using a stock Tb on a Fast intake defeats the purpose of a larger intake. You have gone this far get a larger TB and the proper harness. With NOS and the Tb you will
need a tune anyway.
Good luck
I don’t have a sock TB. I’m looking for a larger TB to use with a 92mm nitrous adapter.
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