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 The R.M. Competition entry...  The R.M. Competition entry fired right up and sounded good. Engine builder Randy Malik further tuned his engine to the atmospheric conditions at Comp through a series of timing, air-bleed, and spark plug changes.  R.M. Competition used a seasoned...  R.M. Competition used a seasoned Chrysler 400 block, filling it with forged components from 440 Source.  Using a 4.25 inch stroke crankshaft,...  Using a 4.25 inch stroke crankshaft, R.M. Competition achieved the largest displacement of the contest at 512 cubic inches. Note the custom oil system and windage tray/crank scraper as well  440 Source H-beam connecting...  440 Source H-beam connecting rods and forged aluminum pistons were utilized for their strength and reasonable cost. At 11.7:1 compression, this engine pushed the limits of Rockett Brand's 93 octane gasoline.  With 4.25 inches of stroke,...  With 4.25 inches of stroke, there's limited room for an internal pickup. To ensure proper oiling, a Muscle Motors external oil pickup kit was used with a Melling pump.  R.M. Competition added an...  R.M. Competition added an inner valvespring for additional valvetrain stability.  Modern Cylinder Head ported...  Modern Cylinder Head ported the Edelbrock heads, and then they were reassembled using the Edelbrock stainless steel valves, springs, and hardware, with new Elgin inner springs.  To actuate the valves, Harland...  To actuate the valves, Harland Sharp 1.5 ratio aluminum roller rocker arms were chosen for their proven reliability.  A Lunati flat-tappet camshaft...  A Lunati flat-tappet camshaft was chosen for its low cost relative to a roller unit,....  ....and matched with Engine...  ....and matched with Engine Tech lifters and hardened 3/8-inch pushrods.  A Holley Dominator was the...  A Holley Dominator was the logical choice. The velocity stacks were installed, and according to Randy, "It doesn't make much difference, but it looks cool."  An Edelbrock PN 2886 single-plane...  An Edelbrock PN 2886 single-plane aluminum intake manifold was utilized for good flow and ported to match the Performer RPM cylinder heads.  Having been previously dyno...  Having been previously dyno tuned, the R.M. Competition entry performed well on Comp's dyno and only needed minor tuning to optimize performance.  We congratulate R.M. Competition...  We congratulate R.M. Competition for bringing a competitive big-block to the 2009 Amsoil/Mopar Muscle Engine Challenge, and we thank our sponsors as well. Be sure to visit moparmusclemagazine.com to see additional photos and videos of these engines running on Comp's dyno.
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