clutch
Race Director
Joined: Sep 1999
Posts: 11,360
Likes: 382
From: Plano TX
Stock was an 11" single disc 26 spline clutch. Not sure what you mean be "smaller" and "bigger"? Different diameter??? I don't think a 12" clutch fits in the bellhousing (could be wrong) although there is room on the flywheel. Flywheel was 14".
Stay with 11". You can get all kinds of clutches in 11". From stock replacement, to centerforces, McCleod, RAM, Hays etc. Personally I've had great results with dual-surface discs. Mine is from McCleod and has organic (like stock) on one side and kevlar on the other. Engages like a stock clutch, i.e smooth and no chatter, but holds the 550 ft-lbs of torque I'm making.
Stay with 11". You can get all kinds of clutches in 11". From stock replacement, to centerforces, McCleod, RAM, Hays etc. Personally I've had great results with dual-surface discs. Mine is from McCleod and has organic (like stock) on one side and kevlar on the other. Engages like a stock clutch, i.e smooth and no chatter, but holds the 550 ft-lbs of torque I'm making.
Melting Slicks
Joined: Nov 2004
Posts: 2,672
Likes: 6
From: Nevada City California
Two different size & style clutches were used for big block 454 in '71.
Second style was the rare MA-6 dual plate clutch, which uses two 10 inch discs. This clutch was used as standard equipment in the LS-6 engined 'vettes. It uses a special pressure plate, intermediary plate and special thinner flywheel as well.
Second style was the rare MA-6 dual plate clutch, which uses two 10 inch discs. This clutch was used as standard equipment in the LS-6 engined 'vettes. It uses a special pressure plate, intermediary plate and special thinner flywheel as well.
Melting Slicks
Joined: Apr 1999
Posts: 2,010
Likes: 3
From: Moon Twp. PA USA
Originally Posted by zwede
Was the use of the dual plate ever confirmed? I've heard that most LS-6 cars came with a single plate although other sources state a dual plate was supposed to be used???
Race Director
Joined: Sep 1999
Posts: 11,360
Likes: 382
From: Plano TX
Originally Posted by glen242
Never seen one in the flesh, but the GM manuals allude to this set up.
But that's all second hand so was curious if anyone knows for sure.
