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08-07-2015, 11:20 AM | #1 |
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Throttle body
If you were building a 1990-1992 Chevy 350 (245/275) for Stock or Super Stock, utilizing the NHRA Engine Blueprint Specification Guideline and Stock Car Classification guidelines, what throttle body would you "legally" use?
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08-07-2015, 07:13 PM | #2 |
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Re: Throttle body
In the blueprint specs all the way to the right of the engine choice depending on year you will see either a number 1 or 2....go to the bottom and it says that the 2 x 1.889" (48 mm ) throttle body is the legal one..........D L Rambo...STK 1300
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08-07-2015, 08:58 PM | #3 |
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Re: Throttle body
I was told quite recently that OEM throttle bodies only in stock and super stock. I was asking if specs say 80 mm, can I use any. Answer was no. Just sayin.
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Jeff Teuton 4022 STK |
08-07-2015, 09:55 PM | #4 |
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Re: Throttle body
As far as I know all the GM 2 port throttle bodies are more of less the same spec. The publish size is in the blue print specs. Some of the TB have slightly different throttle attachments.
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08-08-2015, 10:35 AM | #5 |
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Re: Throttle body
There are generally only two TBI sizes. One is a 1 11/16" bore that is used on 4.2, 5.0 and 5.7 engines and the other is a 2" bore used on 454 engines.
Sorry! I pulled the trigger to quickly. I thought you were talking about TBI engines.
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Last edited by Dwight Southerland; 08-08-2015 at 12:14 PM. Reason: Mistake |
08-09-2015, 08:23 AM | #6 |
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Re: Throttle body
The spec sheet does not list a part number, all it has is N/A. In the notes it says 2 @ 1.889 48MM, so I guess you can build your own throttle body just make sure its 48MM
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Herbie Null 201 SS |
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