The rules have changed a little for the '08 Mopar Muscle/Amsoil Engine Challenge. Read on
If you've followed our previous Engine Challenges, you know our rules each year have limited displacement and certain modifications that can be done to the engine, and also require that each engine run on Rockett Brand 93 octane pump fuel and Amsoil's 10-40 oil, but otherwise anything goes. The power of each engine was then divided into the cost of the main parts of the engine for a dollar-per-horsepower rating. While these rules have led to some interesting and somewhat exotic combinations, we felt this year we'd change it up a little bit. Instead of allowing any combination of parts, we're requiring this year's competitors to each use the same basic block and cylinder head, and whoever makes the most power will win.
While we were deciding which engine to feature in the '08 Challenge, many options were discussed, including the new 5.7 Hemi, as well as the Slant Six and Poly 318. While it would be interesting to see what kind of power the new Hemi or one of these other engines would make, they are just not mainstream enough to warrant a dyno competition based strictly on one of these motors. Since we wanted to feature a powerful engine similar to what our readers would build for their cars, we decided to feature the 440 in this year's competition-not a stroked 440, but a stock stroke engine with a maximum overbore of .060 inch. The 440 has long been a mainstay of Mopar Performance, offering big displacement and easily bolting into most popular body styles, so it makes sense to see what kind of power professional builders can make with this engine.
This year's Engine Challenge will feature an engine like many of you would build-a 440 wit
The main change in this year's rules involves the cylinder heads. While previous contests have allowed the use of any off-the-shelf head, this year will be different. Instead of factoring the cost of the engines, we decided to limit all the competitors to the same head, and see who could make the most power. Although there are many heads on the market now for the big-block Mopar, we wanted to choose a cylinder head that offered good power potential for a reasonable cost. Since Indy Cylinder Head has supported Mopar enthusiasts since they've been in business, and because their 440-SR cylinder heads offer large ports, big valves, and efficient combustion chambers without requiring special rocker gear, they made good sense for our contest.
|Cederstrand Racing Engines||Chenoweth Speed and Machine|
|August Cederstrand||Mike Chenoweth|
|P.O. Box 1653||368 Erie Ave.|
|Brea, CA 92821||Morton, IL 61550|
|Diamondback Engines||Indy Cylinder Head|
|Dave Schultz||Russ Flagle|
|7723 FM 723 ||8621 Southeastern Ave.|
|Richmond, TX 77469||Indianapolis, IN 46239|
|JD Engine and Machine||JMS Racing Engines|
|Jeff Dickey||Mike Johnson|
|900 Spencer Ave.||5450 Peck Rd.|
|Columbia, MO 65203||El Monte, CA 91732|
|Mid America Racing Engines||Schurbon Engine and Machine|
|David Bruns||Scott Schurbon|
|1945 W. 18th St.||203 South Clark St.|
|Washington, IA 52353||Maquoketa, IA 52060|
Indy Cylinder Head has always supported Mopar racers and street enthusiasts alike with a w
A nice feature of the Indy SR heads is they don't require specially offset rocker arms lik
Compared to factory heads, the long-valve design of the Indy heads really improves port si
Our eight competitors for the '08 Engine Challenge have been chosen, and if you attend the Mopar Nationals this year, you'll be able to see their engines on display and speak with the builders during the event. Those of you who have followed our contests will notice some returning engine builders, as well as some new faces in this year's challenge. Two of our previous winners will be attending, as will the engine builders who made the most power in the Hemi and small-block challenges, so this year's competition should be a good one.
Be sure to stay tuned to future articles as we'll detail the results of our dyno challenge and go inside each engine for an in-depth look.
While the displacement and basic parts of our "spec" engine are already determined, the other specifications of the engine are up to the individual builder. We're allowing both roller and flat-tappet cams this year, and carburetion will be limited to 1,350 cfm. Exotic parts, such as ceramic lifters and aluminum connecting rods, will not be allowed, and all engines will again be required to run on Rockett Brand 93 octane pump fuel while on the dyno.
To check out the complete rules for the '08 Mopar Muscle/Amsoil Engine Challenge, be sure to visit moparmusclemagazine.com.
Comp Cams will again host the dyno portion of our contest. Rockett Brand will be supplying
During the dyno portion of the contest, our staff will be on hand to ensure all builders a
If you want to see the engines in this year's competition, stop by our trailer at the Mopa
August Cederstrand of Cederstrand Racing Engines is a previous competitor as an employee o
Confident in his big-blocks, August gives a wink of approval as we have some fun testing a
While this will be their first Engine Challenge, the guys at Chenoweth Speed and Machine a
As one of the first companies to provide a main girdle for the big-block Mopar, Chenoweth
The guys from Diamondback Engines brought a stout small-block to the '07 Challenge, but fa
Avid Mopar racers, the crew from Diamondback Engines is dedicated to tweaking their big-bl
Indy Cylinder Head won last year's competition using Magnum heads to optimize their stroke
Will Indy have an advantage since each competitor is required to use their cylinder heads?
Engine builder Jeff Dickey of JD Engine and Machine made the most power in our inaugural H
Known for powerful racing engines, we're sure the JD Engine and Machine entry will be a co
JMS Racing Engines is a newcomer to our contest; we look forward to seeing what kind of dy
The JMS crew is devoted to building powerful engines. Their facility offers a full-service
Having competed in all of our Engine Challenges to date, David Bruns of Mid America Racing
Having been in all of our competitions thus far may give David Bruns an advantage this yea
Schurbon Engine and Machine placed a very close second in last year's contest and promises
Engine builder Scott Schurbon is eager to compete in this year's challenge, stating that h