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Carburetors Carb discussion and questions. Upgrading a Third Gen carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

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Old 06-03-2007, 12:09 AM   #1
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Join Date: Sep 2006
Location: Sacramento,Ca,
Posts: 404
Car: 1990 Iroc Z,2004 Z06 Corvette
Engine: 5.7 L98 tpi/LS6 346 ci
Transmission: 700r4/MN12
Axle/Gears: 10 bolt 3.23/DTE 3.42

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quick question
my friend wants to know if he puts a stock l98 in his 85 camaro lg4 with the cc carb and a aftermarket dual plane intake how much of a torque loss will he lose we been searching and can't find a really good answer is there a dyno sheet on a tpi l98 vs carb l98 i kno it will pull higher rpms but he wants to know if the torque loss will be horrible
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Old 06-03-2007, 05:07 PM   #2
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Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 33,342
Car: 82 Berlinetta(2)/57 Bel Air
Engine: 86 LG4-> ZZ3(LS1)/mild 396
Transmission: TH700(T56)/TH400
Axle/Gears: 10-bolt 3.23(4.10)/8.2" 10-bolt4.11

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It will be noticeable, but not horrible. I don't have torque curves to quote, but a higher stall torque converter will make you forget about the loss.
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Old 06-03-2007, 07:19 PM   #3
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Join Date: Sep 2006
Location: Sacramento,Ca,
Posts: 404
Car: 1990 Iroc Z,2004 Z06 Corvette
Engine: 5.7 L98 tpi/LS6 346 ci
Transmission: 700r4/MN12
Axle/Gears: 10 bolt 3.23/DTE 3.42

Classifieds Rating: (0)
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Re: quick question
thanks for your reply if he races a stock l98 tpi will he lose he has a t56 out of a 96 camaro and 3.42 gears,will the torque numbers on a carbed l98 be close or a lil higher than the l81 vette,i also have a carb l98 but i swapped the cam and i leave the line harder than a stock l98,should he swap his cam also
Last edited by Vash Vega; 06-03-2007 at 07:22 PM.
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Old 06-04-2007, 02:02 PM   #4
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Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 33,342
Car: 82 Berlinetta(2)/57 Bel Air
Engine: 86 LG4-> ZZ3(LS1)/mild 396
Transmission: TH700(T56)/TH400
Axle/Gears: 10-bolt 3.23(4.10)/8.2" 10-bolt4.11

Classifieds Rating: (3)
Most likely a carb'd L98 w/T56 will outrun a stock L98. I have no clue about an L81 (mostly because I have no clue what that is).

Cam change can only help (if chosen properly, and the rest of the package backs it up).
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Old 06-04-2007, 08:18 PM   #5
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Join Date: Sep 2006
Location: Sacramento,Ca,
Posts: 404
Car: 1990 Iroc Z,2004 Z06 Corvette
Engine: 5.7 L98 tpi/LS6 346 ci
Transmission: 700r4/MN12
Axle/Gears: 10 bolt 3.23/DTE 3.42

Classifieds Rating: (0)
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Re: quick question
Quote:
Originally Posted by five7kid View Post
Most likely a carb'd L98 w/T56 will outrun a stock L98. I have no clue about an L81 (mostly because I have no clue what that is).

Cam change can only help (if chosen properly, and the rest of the package backs it up).
ok thanks and a l81 is an early 80's corvette motor
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