Basic installation rules from TorqStorm

Basic installation rules from TorqStorm

By Alfie Bilk: Basic forced-induction guidelines (6-10psi boost range) for carbureted systems Forged pistons preferred for all boosted applications Cast or Hypereutectic pistons may be used below 500hp and low-boost applications Compression ratios of 9:1 to 9:5.1 ideal for boost levels of 6-8 psi on 91-93 octane pump gas Lobe separation of 112 to 116 degrees, split pattern works best Fuel pump requirements for carbureted systems must be capable of supplying proper amount of fuel at maximum operating pressure. To obtain maximum fuel pressure required under boost, add idle fuel pressure to maximum boost pressure. (If your idle setting is 8psi and your maximum boost is 8psi your maximum fuel pressure required is 16psi) Use a blow-through carburetor. TorqStorm offers Holley Mighty Demon carburetors specifically prepared by the factory for blow-through purposes. Available in the following cfm ratings: 650 CFM Part number 5282020BT 750 CFM Part number 5402020BT 850 CFM Part number 5563020BT Must use carbureted boost-reference fuel pressure regulator with a 1:1 rise ratio Headers recommended for maximum performance Will work with single or dual-plane intake manifolds, (more torque generated by dual-plane designs) Ignition control recommended with adjustable boost-timing retard to prevent detonation. (MSD BTM part number 6462)   Information furnished by Torqstorm® Billet Superchargers 3001 Madison Ave SE, Grand Rapids, MI 49548 (616) 246-8088...
First big Historics event at Barber

First big Historics event at Barber

By Freddie Heaney: Birmingham, Alabama: Barber Motorsports Park hosted their first annual Historic motorsports three-day event May 15-17, 2015. And if they do for Historic road racing cars what they did for vintage motorcycles, they’ll have 80,000 attendees in 10 years’ time. To view these rare Historics click here. Though the premiere event weekend, which was organized by the Historic Motor Sports Association (HMSA), attracted modest numbers of vintage racecars, around 70, it was an excellent first step. The sights, sounds and speeds, particularly of rare Formula One cars from the nineteen-sixties, -seventies and -eighties were glorious. Like Barber’s annual motorcycle Vintage Festival, held each October, a treasure trove of nostalgia was spread before us, all very accessible, informal and agreeable. Located in Leeds to the east of Birmingham and a short distance off I-20, which is the main thoroughfare from Atlanta to Birmingham, Barber Motorsports Park is situated in a unique 740-acre parkland setting. Surrounding the race track a two-lane asphalt ring-road accommodates a tram service that transports visitors to all areas of interest. The centerpiece of the weekend was the 16-race program and the featured marque was Lotus—well-known to George Barber with over fifty vintage machines of his own residing in the museum, adjacent to the track at Turn Nine. Eddie Lawson, a former 4-time 500cc World motorcycle champion and now driving the 1977 Wolf WR4 of Canadian, Maurice McCaig, set the standard. Fastest in qualifying, he won both of the weekend’s F1 races. On Friday’s qualifying sessions Lawson was followed by James Hagan in a 1983 Tyrrell 001 (in full Benetton livery) and Doc Bundy in...
Opening the car from afar: a neat trick

Opening the car from afar: a neat trick

By Martha Maglone: The wave length of the electronic car key is limited to a certain distance. But here is a remarkable trick if you wanted to expand its range significantly—particularly handy when your car is parked among hundreds of others in a field at a race meet and you cannot find it! Watch the...
Ovality and other guarded racing piston shapes

Ovality and other guarded racing piston shapes

By Titus Bloom: Gibtec, makers of custom billet competition pistons reveals… Below their ring lands, pistons are neither round nor do they have parallel sides. Instead they have a larger diameter towards the bottom, between the base of the piston and the piston pin hole. They become progressively smaller toward the top of the piston, which is round because, to achieve proper sealing, round rings operate in round cylinders . The smaller diameter piston crown allows for greater expansion in a region closest to the heat source. Ovality, which means out of roundness, is necessary in all pistons to allow for thermal expansion. It also compensates for deflection of the piston skirt caused by side loads. Pistons are manufactured with single, double or triple ovality and the ovality is best measured by a precision roundness form measuring machine. Ovality in simple terms means the piston is narrower along the piston pin axis (the minor axis) than the thrust axis (the major axis). Because ovality is a function of heat, and therefore the growth the piston is likely to encounter, it is the amount of ovality assigned to a piston that’s the clever part. Ovality values differ, depending upon whether the engine is naturally aspirated, supercharged, turbocharged, or charged with nitrous oxide. Obviously, heat, cylinder pressures and side loadings are much less in the naturally aspirated engine and hence less piston ovality is required. Correct ovality usually manifests itself in the form of a bearing area. This is the area in the middle of the piston skirts that rides in the cylinder and it’s surrounded by a boundary of piston...
Irrepressible Force thinks Big!

Irrepressible Force thinks Big!

Oh how they scoffed when John Force indicated he’d personally fund the running of some of his own team cars this year in the NHRA’s Mello Yello Drag Racing Series. Of all the noises known to man, car racing is the most expensive and they were fearful he was getting onto the slippery slope! Well, Wednesday afternoon’s announcement of new major sponsorship for Brittany Force’s Top Fuel efforts in the form of drinks heavyweight Monster Energy put an end to all of that. Unveiling the program’s significance is scheduled today, Friday May 15, at 12:30pm at the Atlanta Dragway. Mitch Covington, Monster VP of Sports Marketing:  “Monster’s marketing is built on three things mainly: that’s racing, music and girls. We think that fits great with drag racing. We’re just super excited to be back in this sport. As to how we got in with John Force Racing, you guys all know John Force is one hell of a salesman. I actually met him at a wedding party. This dude chased me down the whole time. But I got news for everybody. John Force didn’t sell this deal, it was his daughter Brittany and his other daughter...
Impressive diesel gains: 2.1lb weight-saving per cylinder

Impressive diesel gains: 2.1lb weight-saving per cylinder

Irvine, CA: At CP-Carrillo, two hybrid combinations are in the final stages of testing. One is designated for the common rail 5.9 liter Cummins using a Duramax pin size and compression height with a rod length of 0.856in longer than stock. The other combo is developed for the 6.6 liter Duramax, which comprises a long-rod diesel arrangement with a Top Fuel piston pin. The connecting rod is 0.202in longer than stock. The weight saving is not yet known on the Duramax combination, but news of an impressive 2.0lb approximate saving per cylinder has emerged for the Cummins. Though prototypes are already in use in Truck Pulling contests, CP-Carrillo’s long-rod combinations were initiated for drag racing. Company’s Rick Canning said that with the right camshaft installed the Cummins diesel will rev to 6,500rpm on the snap-of-a-finger. “It’s easily achieved,” he says, “when there is significantly less reciprocating mass attached to the crank!” The test Cummins, which was dynoed with a stock camshaft, generated 1,000hp @ 3,200rpm and produced 1,500lb ft of torque. What happens next? Apparently, the engine is to be re-cammed and installed in a truck puller. When CP-Carrillo created the new Cummins hybrid connecting rod 0.856in longer than the stock counterpart and incorporated a Duramax pin size, a reduction in pin diameter resulted: from 1.575in to 1.358in. The new pin is also shorter. The compression height is also changed from a stock Cummins to Duramax, which measures 1.946in. The difference between the Cummins compression height with the pin change is 0.856in. This instigated the longer connecting rod, which improved the rod-to-stroke ratio by reducing the side load on...