Written by Moore Good Ink 

Columbia, SC: Ram announces a new high performance clutch set for all LS1 and LS6 engines ’97-’04. Assigned with part number 98931HD this new clutch set is now available from their Powergip HD clutch series, a genre of clutch sets designed for properly geared applications with up to 650 rear-wheel horsepower. When combined with a RAM flywheel (PN 1550 steel or 2550 aluminum), this new clutch can also be installed on ’05-’09 LS2 and LS7 engines.


The LS Kit: This new 11-inch clutch set includes a cover assembly and a clutch plate. It provides clamping pressures of 2,900 lb compared to 1,700 to 2,100 lb of the original, depending upon the model.


The Clutch Plate: To provide solid street/strip performance yet agreeable drivability, Ram combined their 900 series organic friction material, similar to that used on high horsepower drag racing applications, with poly-coil springs in an eight-spring 26-spline clutch hub.  To obtain a smooth engagement, the clutch disc incorporates the superior marcel carrier as opposed to the ageing paddle-style clutch disc.


The Marcel Feature: To cushion engagement, sixteen metallic pads (eight per side) are riveted to the marcel carrier.  The marcel carrier has a slight spring wave measuring approximately .020 inches. As the clutch is engaged on take-off, the marcel compresses and reduces the potential for chatter and the effects of aggressive engagement, unlike similar clutch material used on a flat carrier without the marcel wave.


The Clutch Hub: Stock hubs usually feature five or six compression springs in contrast to RAM’s eight, which are urethane encapsulated. Compared to the stock style, the RAM combination contributes approximately three to four times greater resistance to compression loadings. 


Availability and Price: If contacted before noon, Ram ships these LS units same day, otherwise orders usually ship within twenty-four hours. The cost of this new Powergrip HD LS kit is $550.


Questions: For those with clutch-troubles, RAM is always happy to provide the best technical advice, and it’s free. 


FYI: Ram’s progression of single-disc high performance clutches are as follows: HDX sets for 450hp; Powergrip standard sets for 550hp; and Powergrip HD sets for 650hp.


For further information contact:

RAM Clutches, 201 Business Park Blvd., Columbia, SC 29203

Telephone (803) 788-6034 or visit: www.ramclutches.com