throttle body question

698 Views 10 Replies 6 Participants Last post by Steve Wood, Aug 12, 2003

87natty

Discussion Starter · Aug 11, 2003

In your opinion, at what point do you need to get away the stock throttle body? What is the next step up?

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NCBuickGN

· #3 · Aug 11, 2003

87natty:

What is the next step up?

Next step up would be:

The Jay Jackson modification takes the stock-TB out to (inlet)62mm /(outlet)65mm, & the stock upper plenum to 65mm.

Very nicely done mod for the money.

HTH

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87natty

Discussion Starter · #4 · Aug 11, 2003

Low tens? F*ck a new one! Thanks guys, how do I get a hold of Jay Jackson? Does any one polish them?

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NCBuickGN

· #5 · Aug 11, 2003

Jay Jackson----------> [email protected]

You'll be very pleased!

Great guy, excellent work, very fair prices!

HTH yup

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There was a long discussion about this on "another board", and some folks got a little excited. One post said that going to a 70mm TB and the matching plenum added 3psi, with no other changes. Here's something to think about, though. Carburetors are rated for flow at a very low pressure drop. A Holley four barrel is rated at less that a one psi pressure drop, for example. Now think about the size of a 1000 cfm Holley, with throttle plates and shafts, booster venturis, etc, blocking the flow. If the Holley will flow 1000 cfm with less than a one psi pressure drop, what does it take to flow much less than that into a little Buick engine? Remember, the bigger turbos may flow 1000 cfm on the INLET, but it gets compressed to 500 cfm or less at the outlet. I agree with Steve.. the TB won't be a restriction until you start to flow a LOT of air.

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ULYCYC

· #7 · Aug 12, 2003

I believe Jay Jackson has polish TB's for a little extra $$.

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Steve Wood

· #8 · Aug 12, 2003

You can go to my site and look at the pics of the ones the Radius Kid did for Brian Weaver. Works of art.

I think the reworked vesions to 62 are one of the best bangs for the buck around if for no reason other than the vacuum leaks around the shaft have been taken care of.

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The Radius Kid

· #9 · Aug 12, 2003

Steve Wood:
You can go to my site and look at the pics of the ones the Radius Kid did for Brian Weaver. Works of art.

I think the reworked vesions to 62 are one of the best bangs for the buck around if for no reason other than the vacuum leaks around the shaft have been taken care of.

Thanks for the kudos Steve.I agree that Jay's deal is the best bang for the buck.
If you can slow down the air entering the plenum[somewhat] and remove the corner behind the T-body,that goes a ways to helping airflow distribution in the manifold.
Besides,it's still a stock T-body....right?

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87natty

Discussion Starter · #10 · Aug 12, 2003

...it's still a stock T-body....right?

That's what I'll tell he smog ref.

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Steve Wood

· #11 · Aug 12, 2003

it's stock on the outside.

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throttle body question

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