Throttle body question
Thread Starter
Racer
Joined: Sep 2004
Posts: 400
Likes: 4
From: Phoenix AZ
Throttle body question
I would like to upgrade to a 52mm throttle body over my stock unit. Is this a simple job? I am assuming that unless the factory unit is tricky to take off then this would be just a matter of taking off the stock and replacing it with the new one. Any feedback?
Instructor
Joined: Jan 2004
Posts: 178
Likes: 3
From: Evansville IN
There is a guy named Koldos who will rebush the throttle body with bearings and open it up to 52 mm. It costs less than a new one and is much better. I have had mine for a year now and no more roaming idle. I will see kf I can find his e-mail address. Hopefully someone reading this can give you the e-mail.GOod luck Rich
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by aeronautica86
well there is one issue that might complicate it for you - there is a coolant line that runs through the throttle body. not really that hard, but it is there.
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Instructor
Joined: Jan 2004
Posts: 178
Likes: 3
From: Evansville IN
If I remember right, I paid a little over $200 for it. GM does not put bushings or bearings in the housing where the shaft goes. Constant movement ovalizes the holes causing the throttle plate to stick partly open affecting idle.
This guy bores the shaft holes out, installs bearings, and then bores it to 52 mm(stock is 48mm).And installs new throttle plates.Fixed my idle problem and with the bearings, it is better than buying new. I can't find his e-mail but here is a link he has on e-bay for a different throttle body. You can use the contact link on that page to contact him about your throttle body. He will send you one and you send your old one back as a core. He does very good work. Highly recommended.
http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW
This guy bores the shaft holes out, installs bearings, and then bores it to 52 mm(stock is 48mm).And installs new throttle plates.Fixed my idle problem and with the bearings, it is better than buying new. I can't find his e-mail but here is a link he has on e-bay for a different throttle body. You can use the contact link on that page to contact him about your throttle body. He will send you one and you send your old one back as a core. He does very good work. Highly recommended.
http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW
Le Mans Master
Joined: Oct 2002
Posts: 7,178
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From: Bahston Mass.
Pro
Joined: Feb 2002
Posts: 744
Likes: 1
From: Houston Tx
First , unless you are pushing 400 rwhp , you DONT need a larger throttle body.
If you are going to get one get it from DAVE KOLDOS...does a good job for a very reasonable price and they dont have problems. I have one on my car......
If you are going to get one get it from DAVE KOLDOS...does a good job for a very reasonable price and they dont have problems. I have one on my car......
Instructor
Joined: May 2004
Posts: 163
Likes: 0
From: machesney park il
Originally Posted by JB666
Drifting
Joined: Nov 2002
Posts: 1,365
Likes: 3
From: Huntsville AL
Originally Posted by Shriker
First , unless you are pushing 400 rwhp , you DONT need a larger throttle body.
If you are going to get one get it from DAVE KOLDOS...does a good job for a very reasonable price and they dont have problems. I have one on my car......
If you are going to get one get it from DAVE KOLDOS...does a good job for a very reasonable price and they dont have problems. I have one on my car......
Do a search on this subject before you spend the money.
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Originally Posted by 94brick
I would like to upgrade to a 52mm throttle body over my stock unit. Is this a simple job? I am assuming that unless the factory unit is tricky to take off then this would be just a matter of taking off the stock and replacing it with the new one. Any feedback?
According to my calculations, the stock throttle body (48mm) will flow up to 565cfm. There is no way a 350ci engine will come close to flowing that much air unless you've got an extremely efficient engine at very high RPM. If that's the case you're probably not driving it on the street. All a larger throttle body will do for a close to stock engine is decrease throttle response. Therefore, I'm not sure what all the hype is about concerning throttle bodies.
Intermediate
Joined: Oct 2004
Posts: 43
Likes: 0
From: Pittsburgh Pa
Originally Posted by 94brick
I would like to upgrade to a 52mm throttle body over my stock unit. Is this a simple job? I am assuming that unless the factory unit is tricky to take off then this would be just a matter of taking off the stock and replacing it with the new one. Any feedback?
Intermediate
Joined: Oct 2004
Posts: 43
Likes: 0
From: Pittsburgh Pa
Originally Posted by HammerDown
I agree. Save your money, this mod will do absolutely nothing for you unless you port the intake to match the throttle body opening of 52mm. The 52mm might actually HURT your throttle response.
Do a search on this subject before you spend the money.
Do a search on this subject before you spend the money.
