LT1 TB porting services?
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Lloyd Elliot
when did Lloyd start porting "Throttle Body" to larger size?
Intake manifolds and heads, yes. Didn't know he enlarged TB's....if he does
Way back in the day it was David Kudos who did the 52's. What I have
My bad read wrong, I thought you said intake, DUH TB. My bad to mislead you bro.
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Does David Koldos still bore out OE throttlle bodies?
Think Matt Blum stopped doing this back in 2013?
Think Matt Blum stopped doing this back in 2013?
IDK, its been over 20 years since David did mine, IMHO best to do a stock TB if going larger vs aftermarket to avoid the whole IAC fiasco crap with the aftermarket ones
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344 Posts
Yeah I had a BBK 52 that was being a pain, I got ahold of a stock one now
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I actually thought I saw something over on Ls1tech that Lloyd was porting TB. I would give him a ring just to be sure. He may know someone if he doesn't do it himself.
try this guy: SPR Performance he does TBI boring maybe he can also do TPI/LT1 throttle body boring. i know shaft size is the same so throttle shafts can be bushed. i recently did a TPI throttle body with 3/8s qjet bushings
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I've had a ASM Mono-blade for about 8 years with no problems. Something to consider.......
Best of luck with whatever you do!
KW
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344 Posts
I did email Lloyd Elliot, here was his response:
"
The TB butterfly size is the restriction.
Porting the stock TB is really useless.
Lloyd "
It just raises more questions for me. Here is my problem, I have idling issues with the BBK, I've read up on drilling the bypass hole into it, but didn't really want to do that to a $300 part. From previous threads it seemed porting the stock one was all the rage back in the day, I don't want it to be a restriction for my setup if I just throw the stock one on to the intake.
So with all that being said, I'll just use the stock one as is and take the car to a tuner to get it worked out. Thanks everyone
"
The TB butterfly size is the restriction.
Porting the stock TB is really useless.
Lloyd "
It just raises more questions for me. Here is my problem, I have idling issues with the BBK, I've read up on drilling the bypass hole into it, but didn't really want to do that to a $300 part. From previous threads it seemed porting the stock one was all the rage back in the day, I don't want it to be a restriction for my setup if I just throw the stock one on to the intake.
So with all that being said, I'll just use the stock one as is and take the car to a tuner to get it worked out. Thanks everyone
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5,521 Posts
I take it he is thinking you just want to clean up the entry as opposed to boring the body and making new blades
OP
I think the word "porting" that is often associated with a "larger" TB is misleading. 52 or 58 TB have larger butterfly and thus larger "opening".
Unless you make over 400 hp, a larger TB isn't needed and won't give you much more power and sadly the drivability issues with aftermarket TB's "out of the box" are not worth it.
FWIW when I went 383 using my stock "bored" TB (52) I did need to drill out the stock 1/8" IAC hole to 11/64. Ed Wright advised me on this but said take baby steps and log IAC counts at each time you go 1/64" larger. My car is a T56 so I don't have the tuning issues associated with automatic cars using larger TB's relative to adjusting line pressure
One of the early mods was to get the "air foil" for stock TB which did, supposedly, give better air flow into it.
If you can find one, a ASM 54mm TB supposedly had a stock type IAC passage. I assume they are extinct now but maybe somewhere one on ebay
I think the word "porting" that is often associated with a "larger" TB is misleading. 52 or 58 TB have larger butterfly and thus larger "opening".
Unless you make over 400 hp, a larger TB isn't needed and won't give you much more power and sadly the drivability issues with aftermarket TB's "out of the box" are not worth it.
FWIW when I went 383 using my stock "bored" TB (52) I did need to drill out the stock 1/8" IAC hole to 11/64. Ed Wright advised me on this but said take baby steps and log IAC counts at each time you go 1/64" larger. My car is a T56 so I don't have the tuning issues associated with automatic cars using larger TB's relative to adjusting line pressure
One of the early mods was to get the "air foil" for stock TB which did, supposedly, give better air flow into it.
If you can find one, a ASM 54mm TB supposedly had a stock type IAC passage. I assume they are extinct now but maybe somewhere one on ebay
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