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Throttle Body Upgrade Questions
Thread Starter
Instructor
Joined: Jan 2006
Posts: 103
Likes: 2
From: Boynton Beach Florida
2018 C6 of Year Finalist
Throttle Body Upgrade Questions
Is it worth the money to upgrade a stock 78mm TB. Will I notice a performance difference putting on an 80mm or even a 90mm TB with a stock engine with a lot of bolt on's.
Melting Slicks
Joined: Jan 2004
Posts: 2,284
Likes: 3
From: NW Chicago, IL/Clearwater Beach, FL
what about polishing and porting it? i just sent one to mark shaner to have it done....they say no HP gian (and some say 2to5 Hp gain
) thoe you will get a better throttle responce?????????????
) thoe you will get a better throttle responce?????????????
Drifting
Joined: Apr 2004
Posts: 1,530
Likes: 250
From: CT
No, not on an otherwise stock motor. Spend the $$ on a good cold air intake and/or headers.
By the way, stock size is 75 mm at the throat. Aftermarket billet 78mm and 80 mm TBs will fit the stock LS1/LS6 intake manifolds. Any bigger and you need an aftermarket intake manifold.
If you feel you need to get better TB flow go with porting your existing stocker. Like said above, Shaner does a good job, you can also do it yourself, not that difficult.
Jusy my .02.
By the way, stock size is 75 mm at the throat. Aftermarket billet 78mm and 80 mm TBs will fit the stock LS1/LS6 intake manifolds. Any bigger and you need an aftermarket intake manifold.
If you feel you need to get better TB flow go with porting your existing stocker. Like said above, Shaner does a good job, you can also do it yourself, not that difficult.
Jusy my .02.
Melting Slicks
Joined: Jan 2004
Posts: 2,284
Likes: 3
From: NW Chicago, IL/Clearwater Beach, FL
No, not on an otherwise stock motor. Spend the $$ on a good cold air intake and/or headers.
By the way, stock size is 75 mm at the throat. Aftermarket billet 78mm and 80 mm TBs will fit the stock LS1/LS6 intake manifolds. Any bigger and you need an aftermarket intake manifold.
If you feel you need to get better TB flow go with porting your existing stocker. Like said above, Shaner does a good job, you can also do it yourself, not that difficult.
Jusy my .02.
By the way, stock size is 75 mm at the throat. Aftermarket billet 78mm and 80 mm TBs will fit the stock LS1/LS6 intake manifolds. Any bigger and you need an aftermarket intake manifold.
If you feel you need to get better TB flow go with porting your existing stocker. Like said above, Shaner does a good job, you can also do it yourself, not that difficult.
Jusy my .02.
Last edited by birch64; Jan 16, 2007 at 02:27 PM.
Drifting
Joined: Apr 2004
Posts: 1,530
Likes: 250
From: CT
Asuming thats SAE corrected thats good power for just intake and headers. By all means go for the ported TB, you will get some power gain and based on my limited experience, better throttle response.
For what it's worth, bored to death last winter, I replaced my ported stock TB with a Callaway 78 mm billet TB, along with a MTI Racing composit MAFS and Callaway Honker CAI (replaced vette doctors pro-flo + CAI). Gained basically nothing on the dyno from the old set-up although throttle response does seem much sharper.
Given the $650 price tag for the Callaway, porting the stocker seems like the smart way to go.
Now if you're like many of us here you're prbly looking at H/C packages and ----------
Anyway, good luck with the TB.
For what it's worth, bored to death last winter, I replaced my ported stock TB with a Callaway 78 mm billet TB, along with a MTI Racing composit MAFS and Callaway Honker CAI (replaced vette doctors pro-flo + CAI). Gained basically nothing on the dyno from the old set-up although throttle response does seem much sharper.
Given the $650 price tag for the Callaway, porting the stocker seems like the smart way to go.
Now if you're like many of us here you're prbly looking at H/C packages and ----------
Anyway, good luck with the TB.
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Melting Slicks
Joined: Jan 2004
Posts: 2,284
Likes: 3
From: NW Chicago, IL/Clearwater Beach, FL
Asuming thats SAE corrected thats good power for just intake and headers. By all means go for the ported TB, you will get some power gain and based on my limited experience, better throttle response.
For what it's worth, bored to death last winter, I replaced my ported stock TB with a Callaway 78 mm billet TB, along with a MTI Racing composit MAFS and Callaway Honker CAI (replaced vette doctors pro-flo + CAI). Gained basically nothing on the dyno from the old set-up although throttle response does seem much sharper.
Given the $650 price tag for the Callaway, porting the stocker seems like the smart way to go.
Now if you're like many of us here you're prbly looking at H/C packages and ----------
Anyway, good luck with the TB.
For what it's worth, bored to death last winter, I replaced my ported stock TB with a Callaway 78 mm billet TB, along with a MTI Racing composit MAFS and Callaway Honker CAI (replaced vette doctors pro-flo + CAI). Gained basically nothing on the dyno from the old set-up although throttle response does seem much sharper.
Given the $650 price tag for the Callaway, porting the stocker seems like the smart way to go.
Now if you're like many of us here you're prbly looking at H/C packages and ----------
Anyway, good luck with the TB.
i was saying that the car had the headers and intake: I wish i had that power from those two items...
heres all thats done to the car: that made me the power
CAM 2000 LS1 / Y-car .500/.500 ** duration 198-209 ** LSA 115.5
3:42 Gear
180 Hyper tech Thermostat
2800 Vigilante Stall Converter
LS6 Intake
GM Performance spark plug wires
Iridium plugs
28.8lbs Fuel Injectors
Haltech Stinger Air Intake
Slp’s 1.85 Rockers, Titanium Retainers, & Keepers
LS6 Comp Cams Springs (26918-16) and Chrome Molly Hardened Pushrods
TPIS LT Headers,
GHL Exhaust
Magna flow X-pipe
B&M Trans Cooler
¼” coated aluminum tunnel plate
Aluminum end links
ZO6 Red calipers
ZO6 air ducts
Balis spring (in brake control valve)
GM drilled and slotted rotors Zink washed
Ceramic brake pads
LS1 Edit program and dyno tuning Done by dan at FLP
Last edited by birch64; Jan 17, 2007 at 09:29 PM.
