Ported throttle body? WHO?

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Dec 13, 2009 | 07:43 PM

C4vettrn

Thread Starter

Burning Brakes

Joined: May 2009

Posts: 1,014

Likes: 7

From: Ft Wayne IN

Ported throttle body? WHO?

Has anyone used a business with good reults who bore out a sock TB to 52/58MM. Is it cost effective or would you buy new if you had to do it over? Thanks!

Dec 13, 2009 | 07:49 PM

STL94LT1

Race Director

Joined: Jan 2002

Posts: 12,261

Likes: 85

From: O'Fallon Missouri

Ported stock throttle bodies seem to have less problems than their aftermarket counterparts. I've been running an AS&M 52 mm TB for ~8 years with 0 issues..

Dec 13, 2009 | 11:54 PM

383vett

Race Director

Joined: Apr 2003

Posts: 17,697

Likes: 1,666

From: moraga ca

I've had an aftermarket Accel 58mm for years with no problems. I'm not sure a stock tb can be bored to a 58mm.

Dec 14, 2009 | 03:41 AM

5abivt

Safety Car

Joined: May 2002

Posts: 4,659

Likes: 82

From: Toronto ontario

tbs in general are a waste of money unless you are 600 hp + or FI.

Dec 14, 2009 | 07:54 AM

Fastmax32168

Burning Brakes

Joined: Nov 2004

Posts: 800

Likes: 3

From: Port Orange FL

I bought a professional products throttle body for around $175 and have had absolutely no issues at all with it. It turned out to be a nice quality piece at a good price.
Roy

Dec 14, 2009 | 08:04 AM

AGENT 86

Team Owner

Joined: Jan 2003

Posts: 20,290

Likes: 238

From: Summerland B.C. Canada

I was going to use these guys http://cgi.ebay.ca/TPI-52mm-bored-po...item5637f8a510, but after adding shipping back and forth and the fact my core was not usable(already bored by TPS, but worn out), I decided to buy a new BBK.
They promptly answered my emails and have a very good rating.

Dec 14, 2009 | 08:07 AM

AGENT 86

Team Owner

Joined: Jan 2003

Posts: 20,290

Likes: 238

From: Summerland B.C. Canada

Quote:

Originally Posted by Fastmax32168

I bought a professional products throttle body for around $175 and have had absolutely no issues at all with it. It turned out to be a nice quality piece at a good price.
Roy

That's the one I was looking to buy, but it was going to take a few weeks for my parts place, to bring it in. They had the BBK in stock.

Looks like a nice unit for the $

Dec 14, 2009 | 09:28 AM

C4vettrn

Thread Starter

Burning Brakes

Joined: May 2009

Posts: 1,014

Likes: 7

From: Ft Wayne IN

tbs in general are a waste of money unless you are 600 hp + or FI.

I don't understand? Don't all fuel Injections run a TB?

Does anyone know how much flow or CFM a 48mm TB flows vs a 52&58mm TB? Also how much CFM does it take to support 475hp?

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Dec 14, 2009 | 10:19 AM

383vett

Race Director

Joined: Apr 2003

Posts: 17,697

Likes: 1,666

From: moraga ca

Quote:

Originally Posted by 8000RPM

tbs in general are a waste of money unless you are 600 hp + or FI.

Not true. A larger throttle body is more important for a normally aspirated motor than a forced injection motor because the positive pressure of a blower negates the possible restriction in the intake tract of a relatively small throttle body. A normally aspirated motor on the other hand has to "suck" air through the intake so any restriction will cost horsepower. The Calloway twin turbos of the late 80's used the stock throttle body.