LUNATI’S NEW SIGNATURE SERIES I-BEAM CONNECTING ROD: HOW IT’S MADE

Last Friday evening the How It’s Made TV program on the Science Channel featured Lunati cams and crankshafts. Four hours earlier a forging plant in Michigan was engaged in the making of Lunati’s new Signature series connecting rods. First they cut lengths of 1-7/8in diameter 4340 round bar and convey them to an induction-heater, which raises their temperature to almost 2,300 degrees F. In a malleable, plastic condition, not a molten state, the material is handled by tongs and drawn through rollers to flatten it. Then it is placed in each of three con rod impressions carved into a die block. As the hammerman runs the hammer, he displaces the soft, white hot metal into each impression, gradually forming the connecting rod. The force of the 4,000lb falling hammer impacts the material one strike per second. Three strikes of the hammer and the connecting rod is...

NEW WAYS TO INCITE OPTIMUM POWER FROM 2-VALVE; 3-VALVE; & 4-VALVE MODULAR ENGINES

Written by Moore Good Ink For years, coaxing additional power from Ford’s overhead cam engines had been notoriously difficult. The attributes of the camshafts in the Modular engines are peculiarly different to those of the conventional pushrod engine. And even today there are only a handful of cam-design houses with the genius to create camshafts that produce superior power to those of the original equipment manufacturer. Lunati is one such firm. Just recently completed, Lunati has announced three new series of Voodoo camshafts for 4.6 liter Ford Modular 2-valve; 3-valve; and 4-valve engines. For the popular 3-valve version, they are introducing 14 new grinds. At the lower end of this series, the new cams provide significant power increases from idle to 6,500 rpm while using stock valve springs. At the higher end they operate from 2,000 to 6,900 rpm in conjunction with upgraded springs and retainers. The valve springs for all three series are made of premium chrome silicon alloy and stress-relieved by shot peening and polishing. The retainers are available in either chrome molybdenum or titanium. For the 4.6 liter 2-valve engine Lunati now has 9 high-performance cams available and a further 8 for the 4-valve version, making a total of 31 camshafts. The 2-valve cams also work well in the 5.4 liter engine. In addition, Lunati also offers their express custom-grind service for these Modular engines. Particularly useful for 10:1 pump-gas street-strip cars and Saturday night bracket racers, these new gun-drilled lightweight cams have a wide range of profiles-dozens of durations from 220 to 240-that improve the performance of all naturally aspirated, blown, turbocharged, and nitrous-assisted engines....

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...
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