Race Clutch Comparison
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Race Clutch Comparison
We are currently rebuilding our car to be driven at an 80% Race / 20% Street ratio. Weight is approximately 3200lbs. Rest of the car is as follows:
355 in. iron block
Sportsman II 64cc heads
Solid flat tappet cam with 0.533” / 0.544” lift
10.63:1 Static Compression
Weiand tunnel ram with (2) 450cfm Holley’s
Jerico 4spd. Clutch-assisted trans.
Ratios: 2.93/1.88/1.33/1.00
4.88 Rear gear in 12 bolt posi rear.
30x9 Goodyear slick
Currently we have an Hays 10.5in. Competition Borg & Beck pressure plate with 2500lb. static force, mated to a stock Chevrolet flywheel. The input shaft for the Jerico is the 1-3/16” x 18 spline Chrysler input shaft. We also have a spare 26 spline Chevrolet input shaft. We would like to use the Chrysler input shaft, as it seems to be what most Stockers with sticks are running. We would like to use our current pressure plate with a new 10.5in. clutch disk with 18 splines. We need recommendations on a disk and entire clutch setup for future reference. I’d like to try to stay away from sintered iron, as it chews at the stock flywheel (which will be replaced eventually anyway, but I’d prefer to remove it from the car in useable condition). Currently, I’m considering the following clutch disks:
Does anyone have experience with these clutches or discs?
For the next complete clutch setup, I’m considering the McLeod Soft-Lok, McLeod Street Twin, or something from Rob Youngblood at Advanced Clutches. Certainly, Rob’s would be the best, but I’m afraid of losing all streetability, not to mention probably being higher priced than the first two. I’m choosing to stay away from SPEC clutches. I’m leaning towards the Street Twin due to driveability and a perceived similar holding power to the Soft-Lok. The Soft-Lok may be easier on parts, but I believe is also more expensive. The Street Twin seems to get good reviews from those who have used it, as does the Soft-Lok, although it seems that nearly all Soft-Lok users are strictly racers. I’d have to get the Street Twin with a Chevrolet flywheel and Chrysler-splined discs, which may cost a little more. What are the advantages and disadvantages of each setup? Which has more holding power? Which provides more streetability? Which is easier on parts? Has anyone ever used a Street Twin with a Jerico? What OTHER clutch setups would you recommend for the intended usage of the car? For anyone who has used either of these clutches, what is the average life expectancy you have experienced before a rebuild is needed? What kind of times have you turned with either setup?
355 in. iron block
Sportsman II 64cc heads
Solid flat tappet cam with 0.533” / 0.544” lift
10.63:1 Static Compression
Weiand tunnel ram with (2) 450cfm Holley’s
Jerico 4spd. Clutch-assisted trans.
Ratios: 2.93/1.88/1.33/1.00
4.88 Rear gear in 12 bolt posi rear.
30x9 Goodyear slick
Currently we have an Hays 10.5in. Competition Borg & Beck pressure plate with 2500lb. static force, mated to a stock Chevrolet flywheel. The input shaft for the Jerico is the 1-3/16” x 18 spline Chrysler input shaft. We also have a spare 26 spline Chevrolet input shaft. We would like to use the Chrysler input shaft, as it seems to be what most Stockers with sticks are running. We would like to use our current pressure plate with a new 10.5in. clutch disk with 18 splines. We need recommendations on a disk and entire clutch setup for future reference. I’d like to try to stay away from sintered iron, as it chews at the stock flywheel (which will be replaced eventually anyway, but I’d prefer to remove it from the car in useable condition). Currently, I’m considering the following clutch disks:
Does anyone have experience with these clutches or discs?
For the next complete clutch setup, I’m considering the McLeod Soft-Lok, McLeod Street Twin, or something from Rob Youngblood at Advanced Clutches. Certainly, Rob’s would be the best, but I’m afraid of losing all streetability, not to mention probably being higher priced than the first two. I’m choosing to stay away from SPEC clutches. I’m leaning towards the Street Twin due to driveability and a perceived similar holding power to the Soft-Lok. The Soft-Lok may be easier on parts, but I believe is also more expensive. The Street Twin seems to get good reviews from those who have used it, as does the Soft-Lok, although it seems that nearly all Soft-Lok users are strictly racers. I’d have to get the Street Twin with a Chevrolet flywheel and Chrysler-splined discs, which may cost a little more. What are the advantages and disadvantages of each setup? Which has more holding power? Which provides more streetability? Which is easier on parts? Has anyone ever used a Street Twin with a Jerico? What OTHER clutch setups would you recommend for the intended usage of the car? For anyone who has used either of these clutches, what is the average life expectancy you have experienced before a rebuild is needed? What kind of times have you turned with either setup?
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