LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Need measurements on TB Plate.

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Old May 9, 2003 | 01:55 PM
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Z-OwNEr's Avatar
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Need measurements on TB Plate.

Can someone post the measurements of the TB plate. The thickness and the lenght and width please. Im going to mess around with some stuff at work and make one.
Old May 9, 2003 | 07:34 PM
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$hawn's Avatar
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I got 4" as the lenght, and 2" wide, and 1/4" thick.
Old May 10, 2003 | 09:54 AM
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A few questions:
Is this a plate for a stock tb or the AS&M tb that's in your sig?
How is it you are able to turn out a new tb plate but not able to measure one yourself?
Aren't you going to have to get more accurate measurements than the previous post to get it right? And get the holes in the right place?
Old May 13, 2003 | 03:13 PM
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Z-OwNEr's Avatar
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Originally posted by Bud M
A few questions:
Is this a plate for a stock tb or the AS&M tb that's in your sig?
How is it you are able to turn out a new tb plate but not able to measure one yourself?
Aren't you going to have to get more accurate measurements than the previous post to get it right? And get the holes in the right place?
Car is at shop until the end of this week so I dont have one I could measure. Plus the measurements are just a general measure as the one I make at first will be just to see how the lettering turns out. I just wanted it to be a ballpark figure is all. I was just going to sit the piece on top of the TB to see how it looks. Just bored at work is all. Thanks for the concern though.
Old May 13, 2003 | 03:28 PM
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Re: Need measurements on TB Plate.

Originally posted by Z-OwNEr
Can someone post the measurements of the TB plate. The thickness and the lenght and width please. Im going to mess around with some stuff at work and make one.
A stock throttle body inlet is 48 mm in diameter. The matching inlet on the intake manifold which it's attached to is about 52 mm. Therefore, you can safely buy a 52 mm one (like that from TPIS) and bolt it on in place of the stock one without any other modifications. Anything larger (like the 58 mm job from Lingenfelter) would require the intake manifold to be bored out to handle in the increased volume of air. The larger throttle bodies are not physically larger, they've just been bored out making the openings larger.

The additional amount of HP from the 52mm throttle body is questionable. Some reports show little or no increase, yet others claim up to 10 more HP. And some air foils (to smooth the flow through the throttle body) claim to get another 5 HP. But even that is questionable. A 58mm throttle body (in conjunction with the bored intake manifold) might provide a larger increase in HP, but once again, results usually vary.
Old May 13, 2003 | 03:48 PM
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Re: Re: Need measurements on TB Plate.

Originally posted by chasmanz28
A stock throttle body inlet is 48 mm in diameter. The matching inlet on the intake manifold which it's attached to is about 52 mm. Therefore, you can safely buy a 52 mm one (like that from TPIS) and bolt it on in place of the stock one without any other modifications. Anything larger (like the 58 mm job from Lingenfelter) would require the intake manifold to be bored out to handle in the increased volume of air. The larger throttle bodies are not physically larger, they've just been bored out making the openings larger.

The additional amount of HP from the 52mm throttle body is questionable. Some reports show little or no increase, yet others claim up to 10 more HP. And some air foils (to smooth the flow through the throttle body) claim to get another 5 HP. But even that is questionable. A 58mm throttle body (in conjunction with the bored intake manifold) might provide a larger increase in HP, but once again, results usually vary.
^^^^^^
Is clueless about what zowner is talking about
Old May 14, 2003 | 06:27 AM
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Z-OwNEr's Avatar
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Re: Re: Re: Need measurements on TB Plate.

Originally posted by thewinner
^^^^^^
Is clueless about what zowner is talking about
Ummmm what he said....
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