Hemi Tech Spotlight - Wiseco

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TECH The New Generation A MODERN DAY, HIGH-POWERED HEMI Recently we heard that the 9-second barrier was broken in just four short years. Ring Package The ring package was moved down .125-inch to accommodate the supercharger. Since these are specifically designed blower pistons, the ring lands will be less susceptible to lifting under high loads (below). The piston pin on these pistons is way up there, seemingly just a fraction of an inch from the bottom of the piston. But surprisingly, the pin boss only intrudes with the oil ring. Totally Square Engine It’s exciting to write about such a new engine combination, especially when it has parts in it that have not been released to the aftermarket yet. Rickards and Wiseco’s Brian Nutter came up with an inverted dome (not a reversed dish) design that provides a much more efficient flame front and provides more quench area than previous dished designs. Rickards explained, “The problems with the first generations of late-model Hemi pistons was that they came with a reverse dish, not inverted dome. With the reverse dish you lose a lot of quench area of the cylinder head. With this new Wiseco set, we’ve developed a piston that allows the flame front in the cylinder to be much more controllable.” Rickards continued, “The wrist pins have also been relocated closhardcore parts starting to be released, despite this downed economy. This year’s amount of new Hemi parts has allowed engine builders to push the limits and find weaknesses, and it seems everyday we’re learning about new components that will make the late-model Hemi run quicker and faster. With a steady stream of new, hardcore engine parts being released this year, these engines may start to be taken more seriously when it comes to performance and racing. It happened with Ford’s Modular engine, and now it’s become a major threat in some heads-up drag racing classes. The new Hemi aftermarket is a little far off to support purpose-built race motors, but it’s getting there. Last year we covered a Vortech supercharger install and dyno tune on fellow office park tenant Dimitri Cretikos’ blown 6.1L Hemi Charger. This year, Cretikos wanted to step up the power with a K1 Stroker kit, as well as some trick internals that have yet to be released, so Fastest Street Car was there to check it out. When it comes to late-model Hemi building skills and design, Josh Rickards of Vaca Performance is the man to talk to, and you could even say the 5.7L and 6.1L Hemis are Rickard’s specialty. Rickard’s claims this new 426 engine will propel a full interior Charger into the 10-second range. Piston Squirters the 411 4The K1 Technologies crank features a 4.080-inch stroke while the block is also bored to 4.080, a totally square engine. This provides the Mopar-essential 426 cubicinch number. 4The first generation of late model Hemi stroker kits required the builder to remove the piston squirters. With Wiseco’s new 6.1L blower pistons, you can still retain them. nmcadigital.com 35
TECHA MODERN DAY, HIGH-POWERED HEMI The New Generation “I still have a few tricks up my sleeve.” —Josh Rickards Vaca Performance the 411 4The connecting rods we used on this build came from K1 Technologies. They are forged from 4340 steel and feature an H-beam design that will be up to the task of holding on to our supercharged slugs, even when pushing a 4,000-pound land yacht down the track. 4The ring package is a secret setup that Josh Rickards claims will be a real help in making big power with this engine. With a low-tension oil ring, this engine can turn over with only about 9 pounds of force. Compare that to the 25-30 pounds a big-block Chrysler has, and you are talking about a lot of freed-up power. er to the crown, and the ring package has been moved down .125. The skirts are coated and they come with priority pin oiling, plus they’ve been notched for the factory oilers.” The piston oilers basically cool the underside of the pistons by squirting a bit of oil though a series of dual-nozzle gadgets that get bolted into the crankcase. The ability to use the piston oilers with these pistons is a big deal because, before, anytime you ran a 426 stroker crank, you couldn’t run the oilers because the stroke. These, however, have notches that permit you to use them. It’s nice to know that under high-boost some cool oil is getting directed to one of the hottest, most intense parts of your engine. The K1 Technologies crank we opted to use is a forged 4340 steel piece with a 4.080 stroke to give our Hemi a classic 426 cubic-inches. K1 Technologies is a company with attention to detail and have regarded themselves as one of the most meticulous when it comes to checking tolerances. The counterweight placements on this crank are designed for improved performance and the journals feature a .125-inch fillet radii. Other features include a straight-hole oiling system for better lubrication and the crank has been Nitrided for improved bearing life. Of course, the crank also has the provisions for the factory reluctor ring, too. Connecting Rods Milodon’s Late-Model Hemi Stuff We originally contacted Milodon for the oil pan, pickup, and windage tray for this engine build. Unfortunately, we ordered the wrong pan for the body style we plan on dropping this beast into. Milodon does offer a pan that would work with our 6.1L stroker, we just couldn’t get one in time. We could, however, make the windage tray work with the factory pan with some slight massaging. For more info on their Hemi pans, check out milodon.com. The K1 rods are forged, 4340 steel H-beams that have been shot peened for improved fatigue life, come with bronze wrist pin bushings, and are finish honed in the USA. They are also weight-matched +/- 1 gram on each end and also come with the ultra-strong ARP 2000 fasteners. For the oiling system, Rickards retained the factory oil pump, but opted to go with a Milodon windage tray and pan kit. Unfortunately, we ordered the wrong pan and had to temporarily use the factory one, but we do want to mention that Secret Setup 36 November 2009
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Hemi Tech Spotlight - Wiseco

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