GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

Gen IV thorttle body sizes

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Old 10-25-2009 | 08:51 PM
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Default Gen IV thorttle body sizes

Asked in the engine section and got little answers.

What are the sizes of the Gen IV engines TB's. Been getting conflicting data.

4.8/5.3 87mm??
6.0 L76 (truck) 87mm??
6.0 LY6 87mm??
6.2 L92 90mm??



Looking at L92 heads and a truck intake. Would like a 90 mm DBW TB. I though the L92/L76 were 90mm?

And I have thought about using the Gen IV 5.3L intake on a Gen III 5.3L if the TB were bigger, this is on another project since I need an intake anyway.
Old 10-25-2009 | 10:25 PM
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I did not think that there was a true 90mm tb. Just the 87mm. Doesnt it jump from 87 to 102mm?
Old 10-25-2009 | 10:46 PM
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From: gonzales louisiana
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trucks wre 78 and 87. the car ones are 90
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