Indy Cylinder Head's Russ Flagle and Ken Lazzeri won this year's Engine Challenge by tunin
The '07 Mopar Muscle/Amsoil Engine Challenge featured the Chrysler small-block, and the engine builders certainly impressed us with the power their engines made. Even more impressive was the fact that none of the engines suffered what we would call catastrophic failure, attesting to the durability of the Mopar small-block as well as to the quality of the aftermarket parts available for this engine. As most of us remember, it wasn't too long ago that we couldn't even find stroker kits for the LA powerplant. Now kits are not only available, but conservatively priced as well. The small-blocks in our Challenge easily topped 500 hp on Rockett Brand's 93 octane pump fuel, and one engine even came close to the 600hp mark.
Making power like this from the Mopar small-block hasn't always been easy. While our Brand-X counterparts have had stroker kits and aftermarket cylinder heads for some time, it wasn't until relatively recently that the Mopar small-block engine had this kind of support. Though the rules of our contest limited the displacement of these engines to 410 ci, stroker kits for the Chrysler small-block can increase displacement up to a massive 440 ci, making these engines more potent than ever. It's no wonder we're seeing more and more small-blocks powering cars at the local cruise night and dragstrips as the small-block gives great power potential for the cost.
Comp Cams hosts the dyno portion of our Challenge each year, and we thank them for the use
As we wrap up the '07 Engine Challenge, we're going to take a look back at the engines and their dyno numbers. We were impressed not only by the power these engines made, but also the diverse techniques the builders used to attempt to gain an advantage in our contest. These engines were powerful, durable, and built with economics in mind. We encourage our readers to call any of the professional engine builders in this year's Challenge for their next engine build. As the results of our contest indicate, we're sure you won't be disappointed. And if you want a sneak peak at the rules for the '08 Engine Challenge, be sure to visit moparmusclemagazine.com.
|Diamondback Engines||Indy Cylinder Head|
|7723 FM 723||8621 Southeastern Ave.|
|Richmond, TX 77469||Indianapolis, IN 46239|
|Mid America Racing Engines||MRL Performance|
|1945 W. 18th St.||4651 Culley Ln.|
|Washington, IA 52353||Jackson, MI 49201|
|Muscle Motors||R.M. Competition|
|2085 Glenn St.||28648 Maple|
|Lansing, MI 48906||Roseville, MI 48066|
|Schurbon Engine and Machine||Speed-O-Motive|
|203 S. Clark St.||131 W. Lang Ave.|
|Maquoketa, IA 52060||West Covina, CA 91790|
The guys from Indy Cylinder Head used a variety of techniques to win the '07 Engine Challe
Indy Cylinder Head
Though better known for their big cubic-inch wedges and Hemis, the crew from Indy Cylinder Head brought the winning small-block to this year's contest. Their 408ci engine featured Magnum cylinder heads that were ported in-house, a solid lifter flat-tappet camshaft, and an Indy single-plane intake manifold. This engine ran great on pump gas, and as the dyno sheet indicates, it had very broad torque and power curves. This engine was a great blend of power and economics, and would be a blast in a street-driven A-Body.
Placing Second this year was Schurbon Engine and Machine. Their engine was stroked to the
Schurbon Engine And Machine
Our Second Place finisher brought a stout 408ci engine to the Challenge. Engine builder Scott Schurbon stated that when it comes to power on a budget, he loves building small-block Mopar engines because they generally exceed his customers' expectations. He used a stock 360 block, a Comp flat-tappet camshaft, Magnum cylinder heads, RPM connecting rods, and Probe pistons inside his engine, and topped it with a Mopar Performance single-plane intake and 750-cfm Holley.
Indy Cylinder HeadCheck out the dyno numbers posted by the Indy Cylinder Head small-block.
If you look at the top three engines in the '07 Challenge, you might notice a trend. It seems that it's hard to beat the 408 Mopar small-block and Magnum cylinder heads when it comes to power on a budget. Inside his factory block, engine builder Randy Malik used a Lunati flat-tappet solid lifter camshaft and a Scat crank for durability. To keep costs down, factory connecting rods and Keith Black cast pistons were utilized. This engine was topped with a tunnel-ram intake and a dual Edelbrock carburetor and made impressive horsepower, landing RM Competition a Third Place finish in the '07 Engine Challenge.
Mid America Racing Engines
Having been in all three so far, David Bruns of Mid America Racing Engines is no stranger to our dyno contests. After winning last year's competition with his stout 500ci big-block, David decided to impress us by bringing a powerful small-block to this year's Engine Challenge. Like most builders, he used a factory 360 block, boring and stroking the engine to the contest limit of 410 ci. Inside his block, David used a Cam Motion solid roller camshaft, Probe pistons, and Eagle crank and scat connecting rods. Atop the short-block, Indy 360-1 aluminum cylinder heads combined with an Indy single-plane intake and Holley four-barrel helped this engine achieve more than 560 hp for a Fourth Place finish.
Though Schurbon Engine and Machine placed Second in our contest using a 750 Holley, their
West Covina, California
Like all the top finishers in the '07 Challenge, Speed-O-Motive used a seasoned 360 block for their build. Though the block was factory Mopar, the crank and rods were Scat, and the pistons were CP forged units. A Howards Cams solid roller camshaft actuated the valves through T and D rocker arms, and the engine was topped with aluminum Brodix B1-AMC cylinder heads and an Edelbrock Victor 340 intake manifold. This engine made great power and completed all its dyno pulls effortlessly, finishing Fifth overall in the contest.
Instead of bringing a purpose-built dyno engine to the Challenge, engine builder Mike Ware of Muscle Motors brought a true street engine he had built for a customer. Inside the factory block, he used a Callies crank, Ross forged pistons, and a solid roller camshaft to assemble this durable short-block. Mike topped this engine with Edelbrock Performer RPM cylinder heads and a Six-Pack of Demon carburetion. While a relatively small 400 ci and relatively expensive parts kept the Muscle Motors entry from placing better, we were impressed with the power and torque this small-block made.
Engine builder Randy Malik brought yet another stroked small-block to the '07 Engine Chall
Rather than bringing a stroker small-block, engine builder Mike Liston of MRL Performance decided to show the potential of Chrysler's most widely available LA engine-the 318. Using a factory block and crank, he installed Scat rods, Keith Black pistons, and a Comp solid flat-tappet camshaft in his engine and topped it with Mopar Magnum cylinder heads. A Mopar single-plane intake and vacuum secondary Holley carburetor topped this 318, landing Mike in Seventh Place. While 380 hp was a little shy of the number he hoped for, it is still respectable power from a small-displacement engine.
Diamondback Racing Engines
We were eager to see how the Diamondback Racing Engines entry would perform in our contest, but, unfortunately, it was not to be. While their engine fired immediately and sounded strong, a rocker arm issue caused them to abort their first qualifying pull, and repairs couldn't be made in time for the judged portion of the contest. With Brodix B1 cylinder heads, an Eagle crank and rods, and a solid roller camshaft, we're sure this engine would have placed higher if it had made the required pulls.
With tunnel-ram induction, this small-block made great power while only sacrificing a litt
After winning last year's contest, engine builder David Bruns decided to impress us this y
Posting the highest power numbers of the contest, the Mid America Racing Engines entry pla
Since Speed-O-Motive has the reputation for making reliable power, it was no surprise when
Muscle Motors brought one of the smallest engines to this year's Challenge, but impressed
The Speed-O-Motive entry was a strong performer, but cost kept this engine from placing be
That wraps up the '07 Engine Challenge. We'd like to thank all our sponsors and the competitors who participated in the '07 Engine Challenge, and we look forward to the '08 Mopar Muscle/Amsoil Engine Challenge. We're building big-blocks again, and this year they're all required to use the same cylinder heads.
Though only 400 ci, the Muscle Motors entry made impressive horsepower and torque.
Though not a 500hp stroker motor, the MRL Performance 318 made significantly more than 1 h
While it's small displacement limited power, the 318 entered by MRL Performance showed tha
Though a part failure kept Diamondback Racing Engines from competing in the judged portion
Although aborted early, the dyno chart clearly shows the potential of the Diamondback Raci