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Old Feb 19, 2019 | 12:08 PM
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I took an LQ9 out of a 2002 Cadillac Escalade. We are putting it into my wifes 1980 Z28 Camaro. I have a set of 823 LS3 heads, LS3 Cam, LS3 Timing Set and LS3 Intake Manifold. I am missing the LS3 Throttle Body but was told it wouldnt work with my LQ9 harness and PCM anyway.

My question is, Is it easier to keep my current drive by wire 3 bolt throttle body and drive by wire pedal with one of those 3 bolt to 4 bolt adapters? or...
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Should I get a 90mm or 92mm (I cant find which is the factory diameter on the LS3 Intake Manifolds) cable driven throttle body with TPS and AIC?
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Any help would be greatly appreciated as we will hopefully have the motor put together and into the z28.

Thank you,
Jose
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Old Feb 19, 2019 | 02:34 PM
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So you have the engine and harness from the 2002?
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Old Feb 19, 2019 | 02:38 PM
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Yes sir, engine and harness are from the 2002 Escalade, LQ9 engine with the PCM and Harness, came out of a running car.
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Old Feb 19, 2019 | 02:42 PM
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You also have the gas pedal if it's a DBW too correct.
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Old Feb 19, 2019 | 02:44 PM
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If it's a drive by cable then certainly that would be the throttle body I'd be after. I don't like drive by wire setup anyways but to each his own.
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Old Feb 19, 2019 | 02:44 PM
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yup, thats why I bought the whole car for the swap. I have the gas pedal and the 3 bolt TB
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Old Feb 19, 2019 | 02:47 PM
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I'm sure there are some DBW throttle bodies in four bolt pattern. Have you googled it?
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Old Feb 19, 2019 | 02:52 PM
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I'd probably run the adapter plate if no other option. It sounds like you have a 6.0 that was for cathedral port heads and intake and are moving up to square port stuff.
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Old Feb 19, 2019 | 02:53 PM
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Ive been told that the DBW TB that comes on the LS3 intake manifold wont work with my harness and PCM.

I dont know all the information that I need for even a basic google search.
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Old Feb 19, 2019 | 02:54 PM
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Originally Posted by 01CamaroSSTx
I'd probably run the adapter plate if no other option. It sounds like you have a 6.0 that was for cathedral port heads and intake and are moving up to square port stuff.
Thats right, 6.0 with square port stuff. couldnt run the truck intake, even with the 317 cathedral port heads, so i decided to upgrade and now im here haha
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Old Feb 19, 2019 | 03:00 PM
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Since your getting away from the original setup to go bigger you've ran into this conundrum. If there's an adapter plate then that's probably what I would do.
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Old Feb 19, 2019 | 03:29 PM
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Yeah this is the one that I was looking at.
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Im sure it would work. Not sure how bad the restriction would be with a smaller TB than what the LS3 intake manifold is capable of. but that should still plug and play.

Last edited by DJMOJO; Feb 19, 2019 at 03:43 PM.
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Old Feb 19, 2019 | 03:34 PM
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I think so too and I'm sure you can get it opened up to say 92 mm.
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Old Feb 20, 2019 | 03:05 PM
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I looked and looked but I couldnt find an LS1 90mm 8 wire DBW TB, aftermarket or oem!
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