Big-Block Chevy Engine Build - Project American Heroes: Shock & Awe

Project American Heroes Will Blow Away The Competition Thanks To Its 717-Horse Smeding Performance 572 Big-Block

Mike Harrington Oct 17, 2007 0 Comment(s)
Sucp_0710_22_z 572_big_block_chevy Engine_build 1/30

The Ultra series of carburetors are 100 percent wet flow tested from the factory and come with "out-of-the-box" performance calibrations. Even Ben Smeding Jr. helped out with some of the fastening of the ARP bolts.

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Believe it or not, the more time-consuming aspect of this engine build was installing the March serpentine system-2 1/2 hours later it all came together. We found the instructions a bit difficult to follow, but eventually we got everything properly aligned and bolted on.

Sucp_0710_23_z 572_big_block_chevy Engine_build 3/30

Because of the possibility of variances in the mounting positions of some of their components, the March system doesn't come with a belt. A quick measurement with blue masking tape determined the length. The harder part of this equation is finding a good auto parts store that has the proper length belt.

Sucp_0710_24_z 572_big_block_chevy Engine_build 4/30

Holley supplied us with its new Performance Mechanical billet pump. It's a great looking pump and is solidly built. We had to clearance the March idler bracket with a dremel tool in order for the pump to fit.

Sucp_0710_26_z 572_big_block_chevy Engine_build 5/30

MSD recommended one of its billet Ready-to-Run distributors. The folks there were more than confident that this would do the trick on our 572. We used the conversion kit that came with the distributor to lock out the vacuum advance. Chad Martin, our dyno guy, stayed with the blue advance stop bushing that is installed from the factory. This keeps the advance to a maximum of 21 degrees.

Sucp_0710_27_z 572_big_block_chevy Engine_build 6/30

He did change the advance springs to one heavy silver spring and one light silver spring. This will bring all the advance in by about 3200 rpm. To complete the ignition, we used an MSD #8202 Blaster Coil and 8.5mm Super Conductor wires.

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Here's the PAH heavy artillery after Chad fully dressed her in full "get-down-to-business" dyno garb. Smeding used Earl's black -8 Pro-Lite 350 hose and their Ano-Tuff hose ends and carb line kit. After breaking the engine in on standard racing oil, Smeding refilled it with Royal Purple 10-40 synthetic. Besides having a stealth look, this stuff is awesome to work with compared to braided stainless line. You can cut it with a razor knife and you don't have to battle any sharp frayed wires.

Sucp_0710_28_z 572_big_block_chevy Dyno_graph 8/30

Seeing is believing. We included a copy of the dyno sheet to look at. We also high lighted the peak torque and horsepower numbers to make it easier to read.

Sources

Comp Cams
Memphis, TN 38118
800-999-0853
http://www.compcams.com
K&N Engineering
Riverside, CA 92507
800-858-3333
www.knfilters.com
Dart Machinery
Troy, MI 48084
248-362-1188
www.dartheads.com
Smeding Performance
Boerne, TX 78006
877-639-7637
www.smedingperformance.com
Ross Racing Pistons
El Segundo, CA 90245
800-392-7677
rosspistons
Melling Engine Parts
Jackson, MI 49204
517-787-8172
http://www.melling.com
Canton Racing Products
North Branford, CT 06471
203-481-9460
www.cantonracingproducts.com
Sanderson Headers
www.sandersonheaders
King Engine Bearings
Cedar Grove, NJ 07009
800-772-3670
www.kingbearings.com
Performance Stainless Steel
Scotts Valley, CA 95067
www.performancesst.com
Racing Head Service (RHS)
877-776-4323
www.racingheadservice.com
Pro/Race Performance Products
Temecula, CA 92590
(800) 977-0767
www.pro-race.com

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