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Demensional sizes of throttle body

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Old Apr 9, 2009 | 11:09 AM
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Default Demensional sizes of throttle body

Has anyone actually taken measurements of the 5.3L throttle body?
I am considering making my own Throttle body spacer. I need the measurements of the rear of the throttle. Opening size, placement and size of the holes for the attaching bolts. Anyone know if there is a tech drawing of such?
Just trying to save having to take the throttle body off and on several times.
Is there a tech drawing of a commercially available throttle body spacer anywhere I could use?
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Old Apr 9, 2009 | 05:18 PM
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I do not have the spacer out of the car, but I would base your design on the size (length) screws you can find to attach it. I have been kicking the idea around to slicing my spacer in half and adding pipe in between the two sides to vastly increase the volume between the throttle and the intake. That would give me the original mounting surfaces of the spacer to get a good seal on the TB and the intake. Theory says that it should increase torque everywhere under the torque peak (and hopefully make second gear more usable). Keep us updated if you think of it on your results.
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Old Apr 9, 2009 | 09:36 PM
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Yeah, the idea is to put some volume behind the throttle body. I have read that this would be beneficial to air flow into the manifold due to the D shapped obstructions built in because of the need to make room for the DOD oil pressure sending unit. I was considering making the spacer at least 1" thick and smooth walled. I just find it hard to believe that a 3/4" thick spacer with spiral cuts could get any air passing thru it to swirl at all and that even if it did have a minor effect, that by the time the air passed thru the manifold,the air certainly would have changed direction and quality by the time it got to the cylinders. I believe all the spiral cut inside the commercial spacers do is make an annoying noise effect.
I still need a demensional drawing of the manifold opening or throttle body back side or of course a drawing of a commercially made spacer
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Old Apr 11, 2009 | 12:48 AM
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06 ss that is a really crazy good idea i was thinking about stacking two but that makes way more sense
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