Each JEGS motor contains quality engine parts.Our Facility. Also offered is a line of JEGS engines to simplify installation and reduce wrench time. JEGS offers a wide selection of engine performance parts for Chevy/GM, Ford, Mopar, and custom applications. Call us for the following services.Upgrading your vehicle's engine or engine components is a great way to add power and performance. Whether you need a hot rod performance engine or a high performance racing engine, there is no job too big or too small.
SUMMIT RACING PORTING KIT DRIVER
Our racing heritage encompasses: Drag Racing Road Racing Off-Road Racing (Baja) Landspeed Record Racing *Winston Cup *Busch Grand National *Craftsman Truck SeriesEngine Shop Dakota Engine Builders offers a wide range of services all the way from race car engines applications to daily driver street engine applications.
For over 4 decades, our competition engines have been the innovation that powers Champions. After adding race fuel and dropping the ignition timing back 6 degrees, we were rewarded with a whopping 736 hp and 691 lb-ft of torque.Welcome Welcome to the original Engine Shop that Jack Roush built, founded in 1976. We made sure to optimize the bottle pressure by heating it prior to hitting the button in anger. Adding the 150hp shot of nitrous from the NOS Sniper kit actually improved the power output by as much as 170 hp (not uncommon when properly tuned). I guess the new rings and head milling were money well spent. We took extra precautions to properly break in the hydraulic flat-tappet cam from Summit Racing, but this was even more power than we expected from something just snatched from the local wrecking yard.
SUMMIT RACING PORTING KIT PRO
The Pro Comp single-plane intake worked well to optimize peak power and our used Holley carb and HEI distributor both performed flawlessly. Credit the flow rate of the excellent Pro Comp aluminum cylinder heads and extra work performed by Dr. The budget 454 not only managed to exceed 500 hp, but did so in spectacular fashion with peak numbers of 565 hp at 5,900 rpm and 532 lb-ft of torque at 5,400 rpm. Running wilder cam timing (like the Comp XE284H or larger) would require use of the Isky valve-notching tool to add the necessary clearance. This meant the Summit grind (0.540 lift, 238/248 duration) would easily fit. The smaller XE274H (flat-tappet) cam fit with a minimum P-to-V clearance of 0.115, while the larger XE284H cam snuck by with 0.065. We tested P-to-V with a pair of Comp cams, one larger and one smaller than the cam we planned on purchasing from Summit. Since we did not have access to the Summit cam we planned to order for this build up, we did the next best thing. Knowing we needed a healthy cam to reach our goal of 500 hp with the low-compression 454, we mocked-up a pair of cams using the Pro Comp heads and factory pistons prior to assembling the motor. The low-compression, dish-top pistons featured valve reliefs designed for the 2.06/1.72 valve combination used on the factory (iron) peanut-port heads, not the larger 2.25/1.88 valve package in our Pro Comp heads. The factory pistons presented another problem in the form of piston-to-valve clearance.
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