The new Edelbrock RPM Xtreme Cylinder Heads for 427 – 572 cid Big Block Chevy engines strive to provide race level performance in a streetable design envelope. CNC machined runners and combustion chambers achieve flow numbers nearly on par with the Victor series professional race head, while maintaining compatibility with off-the-shelf or even stock components including headers, pistons and rocker arms. The deck has been rolled 1.5° to improve the intake valve angle and consequently port velocity, while ensuring that the 2.25″ (oval) / 2.30″ (rect.) intake and 1.88″ exhaust valves will still clear the factory valve reliefs. The exhaust flange has been raised less than 1/8″ to improve flow around the short turn without causing conflicts with off-the-shelf 2″ primary tube headers designed to work with stock heads. The 300cc (oval) / 325cc (rect.) intake ports and 110cc chamber volumes will ensure that the performance potential of these heads is sufficient for nearly any street driven application. The rectangular port heads are even available with a larger 118cc chamber to support forced induction and pump gas friendly compression ratios.

Rectangle port RPM XT heads #51559 testing on a 555 cubic inch big-block Chevy with 10.0:1 compression, hydraulic roller camshaft [248°/256° duration @ .050] and Edelbrock RPM XT EFI system produced 697 HP and 643 lbs./ft. of torque.

Edelbrock aluminum cylinder heads are sand cast at our private foundry in San Jacinto, CA and are hand assembled at our Torrance, CA headquarters. They carry a one year warranty against any manufacturer defects, and are sold complete with valves, springs and guides pre-installed. Installation is the same as factory cylinder heads, making this an easy bolt-on upgrade with results you will feel on every pull.

Features Include:

• CNC ported combustion chambers, intake and exhaust runners improve air-flow and performance
• Fully CNC machined combustion chambers
• 25-degree valve angle
• 5/8″ thick deck for extreme durability
• Outstanding flow; up to 385 cfm (rectangle port) and up to 356 cfm (oval port)
• RPM XT heads accept most stock port location exhaust headers

Our Flathead build is progressing. Once the heads have been relieved for piston clearance, I’ll start running the build series from the very start. The build began with a salvaged block that was found in an old corn silo in central Ohio. She’s come a long way since then.

I’m still trying to schedule a dyno session for the latest project engine build (our Dart 427W). Between my schedule and the dyno shop’s schedule, it’s been a challenge, but it should happen soon.

In the meantime, I’ve been working on the next build project: a “vintage” Ford 8BA flathead. I’ll start running the article series soon. At this point, the short block is done and the valves are adjusted.

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ROUSH® Performance introduces a new Phased R2300 ROUSHcharger® lineup that allows a growth of horsepower and torque through the life of the unit. Owners can start at a base “Phase 1” level and grow to “Phase 2” and finally “Phase 3” as time, budget, and desire allows.

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Edelbrock is excited to announce the Cylinder Head $50 Cash Rebate and Racing T-shirt promotion. Consumers will receive a $50 cash rebate and (2) Racing T-shirts with the proof of purchase on any pair of new Edelbrock cylinder heads – April 15 through June 30, 2010.

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For GM LS owners looking for the final word in cylinder head performance, Nick Arias Jr. Racing Components presents its new LS-AH Chevy Hemi® cylinder head. Poured from 356 T-6 alloy and featuring full water jacketing, the LS-AH Chevy Hemi will bolt on to any GM LS factory or aftermarket block.

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Goodson announces its release of their Y-1 Magnetic Crack Detection Yoke. Replaces Magnaflux Y-6.

This new Magnetic Particle Inspection device from Magnaflux is 37% lighter than the standard yoke. It features a soft grip for your comfort while operating plus an angled body to keep your arm and wrist in a more natural position. The new trigger position and shape make it easy to use. The body is impact and chemical resistant and includes an eyelet for hands-free carrying. Best of all, this new unit is field serviceable, reducing your downtime.

Specifications: Current Draw: 115V – 60 Hz, Line Current: 2.2 Amperes, Weight: 4.56 lbs (2.07kg), Cord Length: 10’ (3.05m), Leg Capacity: 0-11” (0-30cm across poles), Warranty: One (1) year.

Order Number                                   Jobber            
MF-623502                                         $734.99                     

EngineQuest^® (EQ^®), a leading supplier of stock and performance cylinder heads and engine components, has introduced two new Chrysler cylinder head bolt kits. These new head bolt kits fit the Chrysler 4.7L V-8 engine 2000-2007 (EQ Part #HB287N) and the Chrysler 3.7L V-6 engine 2002-2007 (EQ Part #HB226N).

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Edelbrock is pleased to announce the delivery of the E-Force Supercharger System for the 2010 Camaro SS manual transmission cars. This system dramatically improves the horsepower of the stock LS3 engine, from 426 HP to 599 HP (as measured at the engine flywheel), while reducing parasitic loss through the use of an integrated bypass valve.

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Goodson announces its release of their .572” Top Pilots for larger diameter Sioux-style & OE stone holders. Use with our SX-1703 Stone Holder for large diameter stones. 11 ½” OAL. Check out their website @ www.goodson.com or call toll free, 1-800-533-8010 for more information.                             

Diamond’s new, comprehensive range of nitrous pistons comes with all the bells and whistles.

Obviously, they are not designed to compete on price with entry-level conventional pistons. However, for those who need an entry-level piston today but may be considering adding nitrous or forced induction later, choosing the nitrous piston now might be the wiser plan.

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