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DBW Throttle With FAST90 Intake

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Old Jan 30, 2009 | 07:20 AM
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Default DBW Throttle With FAST90 Intake

DBW Throttle With FAST90 Intake

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What size is stock GM Truck DBW TB, 78mm? Does it fit FAST90 intake? What's the other option to run FAST intake in DBW GM Truck 03+?
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Old Jan 30, 2009 | 08:32 AM
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IMO save the money dont buy the intake...it wont help much the gains wont justify the cost
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Old Jan 30, 2009 | 09:26 AM
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You can run an LS2 or LS7 DBW 90mm TB. Just be sure to get the adapter, Speartech carries one and I think DrX does too.
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Old Jan 30, 2009 | 09:29 AM
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Originally Posted by sonoma43
IMO save the money dont buy the intake...it wont help much the gains wont justify the cost
I already have heads/cam/ported FAST90/90 on F-body 5.7L engine that will go as whole in the truck. If I put the truck intake/TB it might choke the head/cam plus I will have a ported FAST90/90 doing nothing.

I have F-body accessory drives to use in the truck. To ditch all that because of DBW TB will be a waste.

If the stock DBW TB will fit FAST90 intake, I might end up using it.
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Old Jan 30, 2009 | 10:57 AM
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Originally Posted by Denali08
I already have heads/cam/ported FAST90/90 on F-body 5.7L engine that will go as whole in the truck. If I put the truck intake/TB it might choke the head/cam plus I will have a ported FAST90/90 doing nothing.

I have F-body accessory drives to use in the truck. To ditch all that because of DBW TB will be a waste.

If the stock DBW TB will fit FAST90 intake, I might end up using it.
Ahh I see now...I didnt know you were going to use the tb to compliment whats already done...my bad
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Old Jan 30, 2009 | 11:24 AM
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run an ls2 TB.the 3 bolt 78mm truck tb wont work.you need the one with 4 bolt holes
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Old Jan 30, 2009 | 06:11 PM
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+1 on the ls7 with the drx adapter.
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Old Jan 31, 2009 | 06:40 AM
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Thanks guys. So, it is either LS2/LS7 DBW TB and Drx adapter or putting stock truck intake/DBW TB.

Is it going to hurt power that much with stock truck intake/TB. It's Vindicator Cam and TFS 215 heads. No plan to rev past 6700. So, is it going to be choked with Truck Intake/TB. I might sell the FAST90/90. Some talk is already going with a possible buyer.
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