Stoa Takes IMCA’s Triple Crown With World Products

Written by Moore Good Ink Boone, Iowa: Kevin Stoa is enjoying another excellent year in IMCA’s Modified division. By winning Friday’s Fast Shaft All-Star Invitational race at Boone Speedway, Stoa acquired IMCA Triple Crown status—a remarkable achievement.   The Triple Crown consists of IMCA’s Super Nationals, which he won in 2000 and again in 2008, the Harris Auto Racing Race of Champions in 2005, and now the Fast Shaft All-Star Invitational race.   “It’s always a wonderful thing to win a race at Boone because you run against very, very tough competition,” Stoa said.     Minnesota born and bred, Stoa lives in Salisbury, NC, but plans to return to his homeland around Christmas to develop his new race engine-building business. Stoa, renowned for his preparation and his thoroughness, has for years been a strong advocate of World Products, running their blocks, heads, and intake manifolds. His engine customer, Cale Sponsler, also a World Products runner, deserved the Drama Award at this year’s Super Nationals by racing hard in the heats and in the A-features and qualifying, flipping the car in the finals, and still finishing fifth in this year’s most prestigious IMCA...

Ram’s Powergrip clutch: Greater clamping pressures without sacrificing drivability

Written by Moore Good Ink Columbia, SC: RAM Automotive has extended its Powergrip HD clutch series to include a new high performance kit for 4.6 liter Mustangs, 2001-2004. Established in 1972 and one of the most knowing of all clutch makers, RAM has designed their new clutch set for properly geared applications of up to 650 horsepower at the wheels, and designated it #98951 HD. The Kit This new 11-inch setup includes a cover assembly with clamping load increases in the order of 60%-80% over stock, a clutch plate incorporating the superior Marcel carrier, and a release bearing of RAM’s own design, sealed and with a hardened face. The Clutch Plate To provide aggressive 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 eight urethane-encapsulated springs in the 11-spline clutch hub.  To overcome chatter troubles, the clutch disc incorporates a Marcel carrier as opposed to the 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 coated. Compared to the stock style, the RAM combination contributes approximately four times greater resistance to compression loadings.  The cost...