T56 behind a 496 BBC?
06-30-2009, 10:02 PM
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Car: 1989 IROC-Z
Engine: 383 waiting on afr 195 comps
Transmission: T-56
Axle/Gears: 3.42 Posi
T56 behind a 496 BBC?
I have a t56 in my sbc car currently. I am building a mark vi 496 BBC. The engine is a 1 pc rms, and its internally balanced like my current sbc. From what i understand the flywheel and bellhousing should work fine. My question is what will i have to do to the trans to make it hold up to well over 500 ft lbs. What clutch do you suggest, internal parts ect. I plan to eventually use a 4l80e but want to try the 6 speed first. Any help is appriciated. Thanks.
07-01-2009, 05:38 AM
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Car: 1985 Camaro Z28, VIN F
Engine: 427 sbc, HSR
Transmission: T-56, self rebuilt 700+ hp
Axle/Gears: Moser 12bolt, 3.42 trutrac
Re: T56 behind a 496 BBC?
The T56 is conservatively rated to 450lb-ft, so your 500 isn't beyond a stock unit. (If you lighten the car, even better..)
The common upgrades to the T56 in order are:
- Upgrade to Carbon fiber blocker rings
- steel 3/4 shift fork
- bronze shift fork pads (all 4 forks)
- billet steel synchro keys (3/4-definitely, 1/2-recommended, 5/6-optional, Rev-rarely)
- Upgrade 2nd gear with larger engagement teeth
- Upgrade to viper output shaft
The last two to take the T56 from ~700lb-ft to about 900lb-ft..
McLeod makes twin-disk clutches that will hold that much power.
The common upgrades to the T56 in order are:
- Upgrade to Carbon fiber blocker rings
- steel 3/4 shift fork
- bronze shift fork pads (all 4 forks)
- billet steel synchro keys (3/4-definitely, 1/2-recommended, 5/6-optional, Rev-rarely)
- Upgrade 2nd gear with larger engagement teeth
- Upgrade to viper output shaft
The last two to take the T56 from ~700lb-ft to about 900lb-ft..
McLeod makes twin-disk clutches that will hold that much power.
07-01-2009, 02:58 PM
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Car: 92 RS
Engine: 2000 454 Carb
Transmission: T-56
Re: T56 behind a 496 BBC?
Could you guys help me out.
I am putting a T-56 bwhind a 454 Gen VI. There is a guy selling a flywheel from a mercruiser 454 Gen VI. Do you guys know if thie will fit.
I am putting a T-56 bwhind a 454 Gen VI. There is a guy selling a flywheel from a mercruiser 454 Gen VI. Do you guys know if thie will fit.
07-01-2009, 07:18 PM
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Car: 1985 Camaro Z28, VIN F
Engine: 427 sbc, HSR
Transmission: T-56, self rebuilt 700+ hp
Axle/Gears: Moser 12bolt, 3.42 trutrac
Re: T56 behind a 496 BBC?
Does the Mercruiser have a T56 on it now? The LT1 T56 uses a different flywheel than most other transmissions, so even if the flywheel will fit, it won't work with a LT1 T56 unless it's designed for it..
07-06-2009, 09:20 AM
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Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
Re: T56 behind a 496 BBC?
Nope, it won't work. Leave the boat parts with the boats. You need a custom flywheel from McLeod or Centerforce to match the imbalance of your 454.
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