52mm throttle body
Thread Starter
Melting Slicks
Joined: Oct 2002
Posts: 3,193
Likes: 1
From: Cincinnati Oh
52mm throttle body
Which is the best place to have my L98 throttle body reconditioned & bored to 52mm? I know there's a guy on the forum who does it for around $200, but I cannot find him.
Any ideas or suggestions?
TIA
:cheers:
Any ideas or suggestions?
TIA
:cheers:
Intermediate
Joined: Jul 2001
Posts: 27
Likes: 0
From: Virginia
Re: 52mm throttle body (Ramanstud)
You are thinking of Dave. His email is David Koldos [dkoldos@ameritech.net]. He just did my TB and it looks real good. He charged more for the L98 TB. I think I paid $220 for the milling and the bearings added to the throttle.
Pro
Joined: Mar 2003
Posts: 555
Likes: 0
From: Seattle WA
Re: 52mm throttle body (BillV)
Have you noticed that the car has improved? I have a L98 also and this sounds good but can you buy a bigger and even bigger sized throttle bodies...Cost is for a cool looking Mod..
Rob :steering:
Rob :steering:
Le Mans Master
Joined: Feb 2003
Posts: 9,087
Likes: 0
From: Chicago IL
Re: 52mm throttle body (Tolofou)
Unless you have ported your plenum, added bigger runners and an Edelbrock/TPIS/Accel manifold, don't bother. The stock stuff is flow limited to where a 52mm would be a waste of your money.
AFTER installing those parts, go with the 52mm. An airfoil in the stock 48mm will suffice. ;)
AFTER installing those parts, go with the 52mm. An airfoil in the stock 48mm will suffice. ;)
Racer
Joined: Nov 2002
Posts: 427
Likes: 0
From: Stillwater OK, Fun City USA
Re: 52mm throttle body (Ramanstud)
David Koldos did mine several months ago. I only needed the throttle shaft fix he offers, but I figured as long as he had it I might as well go with the whole shebang.
He did my throttle shaft w/roller bearings, added an airfoil and bored it from 48mm to 52mm w/new blades, and relocated the off idle vacuum port. When it came back it was perfect, he did an awesome job and I highly recommend him. At the time he was charging around $210, after shipping seems like I was into $220-$225.
Matt
He did my throttle shaft w/roller bearings, added an airfoil and bored it from 48mm to 52mm w/new blades, and relocated the off idle vacuum port. When it came back it was perfect, he did an awesome job and I highly recommend him. At the time he was charging around $210, after shipping seems like I was into $220-$225.
Matt
Instructor
Joined: Oct 1999
Posts: 145
Likes: 0
From: San Francisco, CA, USA
Re: 52mm throttle body (Ramanstud)
Here's a stupid question, why would I have this service done instead of buying a new Edelbrock 52mm body? The reason I ask is that I notice quite a bit of play in mine, plus I have a somewhat erratic idle (which may be caused by a leakind bushing?), and I'm debating what to do about it.
Pro
Joined: Jun 2001
Posts: 648
Likes: 0
Re: 52mm throttle body (Fatt Vette)
Could you tell any difference once you got it back and put back on?
Mine seems fine but I bet my bearings are as old as the car, 90k+ miles.
Whats the purpose of relocating the vacuum port ?
Mine seems fine but I bet my bearings are as old as the car, 90k+ miles.
Whats the purpose of relocating the vacuum port ?
Waka, Waka, Waka!
Joined: Jun 2002
Posts: 2,435
Likes: 2
From: Richmond Virginia
CI 4-6-8 & 10 Veteran
St. Jude Contributor
Re: 52mm throttle body (Ramanstud)
David Koldos did mine too. Chalk up another satisfied customer. I had a different address though, DKoldos@aol.com . Mine was done last spring, so the other one might be newer.
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Racer
Joined: Nov 2002
Posts: 427
Likes: 0
From: Stillwater OK, Fun City USA
Re: 52mm throttle body (Iroc)
If you mean could I tell a difference in performance, no, I was not expecting to. The throttle body is not the bottle neck in an L98, it will be there waiting when I make future modifications to the intake tract.
If you mean throttle operation, yes it did. My throttle shaft had worn into the body casting very badly, and required considerable effort to bring it off idle. Now everything is fine. Factory t'bodies do not have bushings, the die cast aluminum housing is meant to act as the bearing surface.
The vacuum port is modified for two reasons. One, when you hog out the bores the area gets very thin, or breaks through, dependent on the casting. Two, as the bore gets bigger the blade angle changes, therby changeing the timing and intensity of this vacuum event.
Matt
If you mean throttle operation, yes it did. My throttle shaft had worn into the body casting very badly, and required considerable effort to bring it off idle. Now everything is fine. Factory t'bodies do not have bushings, the die cast aluminum housing is meant to act as the bearing surface.
The vacuum port is modified for two reasons. One, when you hog out the bores the area gets very thin, or breaks through, dependent on the casting. Two, as the bore gets bigger the blade angle changes, therby changeing the timing and intensity of this vacuum event.
Matt
Pro
Joined: Jun 2001
Posts: 648
Likes: 0
Re: 52mm throttle body (Fatt Vette)
If you mean throttle operation, yes it did. My throttle shaft had worn into the body casting very badly, and required considerable effort to bring it off idle.
This sounds great. I didn't want to buy an aftermarket TB since the larger size won't be necessary till I do major engine mods.
How long were you all without your TB?
Does he paint it as part of the recondition or have you had him paint it?
It would be the answer to all my acceleration prayers :blueangel: :cheers: :flag :steering:
Racer
Joined: Nov 2002
Posts: 427
Likes: 0
From: Stillwater OK, Fun City USA
Re: 52mm throttle body (Iroc)
That is exactly how mine was, hard to depress from the peddle, but seemingly normal by hand under the hood. I replaced the cable, greased everything, to no avail. With the throttle closed and engine off, try moving the throttle lever fore to aft, without twisting, there will probably be a surprising amount of movement.
He did not take very long, painting issue never came up.
Matt
He did not take very long, painting issue never came up.
Matt
Pro
Joined: Jun 2001
Posts: 648
Likes: 0
Re: 52mm throttle body (Fatt Vette)
I just ran outside and checked it, best I can tell seems to have 1/16th inch of movement.
I'm sold :yesnod:
My engine is all stock for now, would it be worth boring to 52mm? Opinions plz...
Thanks :steering:
I'm sold :yesnod:
My engine is all stock for now, would it be worth boring to 52mm? Opinions plz...
Thanks :steering:
Waka, Waka, Waka!
Joined: Jun 2002
Posts: 2,435
Likes: 2
From: Richmond Virginia
CI 4-6-8 & 10 Veteran
St. Jude Contributor
Re: 52mm throttle body (Iroc)
How long were you all without your TB?
Cruising
Joined: Feb 2011
Posts: 10
Likes: 0
From: Tulsa Okla
So on a stock engine you get no gains from installing a 52mm TB? Will also have front and rear smooth couplers, K&N air filter with less restrictive housing, and a Corsa Pref exhaust installed at the same time.
Will I feel noticable power improvement?
Will I feel noticable power improvement?
Last edited by paulsharris; Apr 14, 2011 at 08:24 PM.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Youll feel the exhaust/catback pick things up...if you want cut the airlid other than that the rest of those mods will add 0 power to your car.
Save money for something else. Stock TB does pretty well fwiw.
Save money for something else. Stock TB does pretty well fwiw.
Pro
Joined: Jun 2005
Posts: 581
Likes: 60
From: USA
there's a zillion threads on this. in a nutshell. without taking off the heads, not doing the cam (i.e. "not breaking the engine down"):
on the exhaust side: headers, cat-back exhaust system. big gains. highest priority.
intake: TPI manifold base, bigger diameter runners, port your plenum. or TPIS mini-ram. or HSR. for the mini-ram and HSR, IMHO you need a cam swap to get the full benefit of those.
and then you can cheat a little bit on the valve train with 1.6 rockers. need to think about your existing valve springs, though.
IMHO, the stock throttle body is adequate for all of the above until you do at least the cam and/or heads. and even then it's debatable, depending.
on the exhaust side: headers, cat-back exhaust system. big gains. highest priority.
intake: TPI manifold base, bigger diameter runners, port your plenum. or TPIS mini-ram. or HSR. for the mini-ram and HSR, IMHO you need a cam swap to get the full benefit of those.
and then you can cheat a little bit on the valve train with 1.6 rockers. need to think about your existing valve springs, though.
IMHO, the stock throttle body is adequate for all of the above until you do at least the cam and/or heads. and even then it's debatable, depending.
Last edited by rpoL98; Apr 14, 2011 at 10:32 PM.
....resurection