58mm Throttle Body
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Joined: Aug 2004
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58mm Throttle Body
I have a 92 LT1 6 speed. I'm trying to find a 58mm TB that will fit. I've heard of there being issues with ASR on some TB's. It seems that every company that makes throttle bodies has a different listing for what models fit where. So, does anyone know what is available? I know Holley, BBK/Edelbrock,TPIS all make them.. What fits? Are L98 and LT1 TB's the same? Is there any way to pull the cable assembly off the side of the stock TB so I don't need to worry about ASR cable mounting?
Thanks!
Thanks!
Burning Brakes
Joined: Sep 2004
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58MM throttle body is pretty big. Unless you have major mods done and making over 400hp, I wouldn't recommend it. A stock TB supplemented with a air foil should handle up to 400hp. If anything, I would go with a 52MM. What are your current mods?
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Blower with 10+ lbs.
52 vs 58 mm argument aside, the part numbers are still all over the place.
52 vs 58 mm argument aside, the part numbers are still all over the place.
Originally Posted by Ladimer
58MM throttle body is pretty big. Unless you have major mods done and making over 400hp, I wouldn't recommend it. A stock TB supplemented with a air foil should handle up to 400hp. If anything, I would go with a 52MM. What are your current mods?
Race Director
Joined: Sep 2004
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From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
I would personally call TPIS (952) 448-6021. Their parts seem to work very well and they are very knowledgeable, but they are also somewhat pricey. They run $500.
Melting Slicks
Joined: Dec 1999
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From: Austin, TX
I have a Holley 58mm (haven't installed it yet, though). Currently have a 52mm BBK and have never had problems with ASR. You will need to adjust the TPS sensor as well as setting idle, but that's not too hard,especially with a scan tool.
There are various different connections for vacuum lines and Auto-trans kickdowns depending on what year you have. All of the ones I've seen have different part numbers for L98 and LT1/4.
You'll also need to bore out your intake if you go with a 58mm TB. The stock intake inlet bores are 52mm (same for L98, LT1, LT4).
There are various different connections for vacuum lines and Auto-trans kickdowns depending on what year you have. All of the ones I've seen have different part numbers for L98 and LT1/4.
You'll also need to bore out your intake if you go with a 58mm TB. The stock intake inlet bores are 52mm (same for L98, LT1, LT4).
