B&G placed fifth in this year's Engine Challenge, showing that it doesn't take exotic part
The AMSOIL/Mopar Muscle Engine Challenge is one of our favorite events, as we get to spend a week at Comp Cams' Memphis, Tennessee, facility flogging some of the most powerful Mopar engines around on their engine dyno. This year was no different, as six contestants met the deadline and requirements to enter the Engine Challenge, each with their own theory about the best way to gain an advantage.
The winner of the 2010 challenge was determined by measuring peak horsepower and dividing it into the displacement of the motor, for a horsepower per cubic inch rating, and all but one of the engines this year exceeded the standard of one horsepower per cubic inch. As you'll see, the fifth place B&G Speed and Machine entry was a basic, economically built 360, still making an impressive 418-plus horsepower for a 1.14 horsepower per cubic inch rating.
Due to a mechanical issue, last year's second place finisher, Chenoweth Speed and Machine, didn't make the required dyno pulls while at Comp. Claiming a total displacement of only 279 cubic inches, this would have been the smallest engine in the contest, and although we didn't get to see its potential during the 2010 contest, we'll still take a look at their combination.
Using a Mopar 273 as a basis for their entry, we were eager to see how much power the Chen
Every year the contestants chosen for the AMSOIL/Mopar Muscle Engine Challenge have from m
The event draws a crowd as these engines push the limits of pump-gas Mopar power.
Each engine is torn down after its dyno pulls and inspected to ensure compliance with our
B&G Speed and Machine Bargersville, Indiana
Each competitor in this year's contest had their own theory about the best displacement given our rules, but B&G Speed and Machine simply relied on one of the best ways to make small-block power, a solid 360. Knowing that the RHS heads were a great match right out of the box for a Mopar 360, engine builder Bill Hess planned his combination around that match. On the dyno, the crew made a solid showing after sorting out an electrical misfire, making a best judged pull of 418.7 horsepower from their 367.2 cubic inch small-block.
Starting off with a used 360 block, B&G bored the casting .040 over, using a stock crankshaft with a stroke of 3.58 inches. Eagle forged steel connecting rods combined with economical Speed Pro hypereutectic cast pistons rounded out the bottom end, which was balanced as well. A Chet Herbert solid flat tappet camshaft was used arriving at .528 inch intake and .550 inch exhaust lift, and 255 degrees of duration at .050 inch lift.
The B&G Speed and Machine crew were newcomers to our annual event, placing Fifth by effici
The B&G entry performed well on the dyno, making all its required pulls and netting well o
Starting with a factory 360 block, B&G bored the block .040 over and filled it with a fact
To top their solid short-block, B&G used the required RHS/Indy X heads, with shaft mounted rockers and LA intake pattern. These heads are a direct replacement for older Mopar small-blocks, offering improved flow, bigger valves, and a far better combustion chamber design than factory heads. To achieve better flow, these heads were fitted with large 2.05 intake and 1.60 exhaust valves, actuated by factory 273 adjustable rocker gear. For induction, an Edelbrock Victor 340 intake manifold was combined with an 800-cfm Holley double-pumper. Good for over 418 horsepower on pump gas, this 360 would make any Mopar a fun ride.
Engine parts for Mopar small-blocks are more reasonably priced than ever, so it makes sens
Chenoweth Speed and Machine Morton, Illinois and LaRoy Engines Challis, Idaho
Last year Chenoweth Speed and Machine and LaRoy Engines were competing against each other in our dyno contest, placing second and third respectively. No doubt noticing each other's strong points, Jim LaRoy and his sons teamed up with Dale and Mike Chenoweth this year, performing much of the cylinder head porting and valve work required to achieve maximum flow numbers. Using a 273 as the foundation for their build, the Chenoweth/LaRoy 279 cubic inch small-block would have required the least amount of horsepower to win the contest, since it was the smallest engine entered.
During the bench racing and idle chatter around our trailer at the Mopar Nationals, we learned that the Chenoweth/LaRoy entry had encountered a cooling system problem during dyno testing, but that the team had pulled the heads and replaced suspect head gaskets to repair the issue. Unfortunately, it reared its ugly head again once the engine was started and brought to temperature at Comp. Noticing water blowing from the dyno exhaust connection, the crew shut down the engine to investigate. Pulling the spark plugs, the problem became apparent as coolant was found in the number seven cylinder. Deciding not to risk further damage, the team chose not to make their dyno pulls, disqualifying themselves from the competition. We certainly would have liked to see this little engine run, as it could very well have been a contender in the 2010 AMSOIL/Mopar Muscle Engine Challenge had it not been for the problem.
Knowing that you don't have to run a roller cam to make respectable power, B&G chose a sol
The RHS/Indy cylinder head is a great design, derived from research performed by Indy duri
Available in both LA and Magnum versions, B&G chose the LA versions to utilize a set of fa
Keeping with the budget theme, this 360 utilized a second-hand Edelbrock Victor 340 intake
We congratulate B&G Speed and Machine on their performance in this year's Engine Challenge
Chenoweth Speed and Machine and LaRoy Engines, last year's second and third place finisher
The Chenoweth/LaRoy entry appeared to be well-prepped, so the team filled the engine with
On the dyno, this 279 cubic inch small-block sounded crisp as it came up to temperature, b
A check of the spark plugs revealed coolant in the number seven cylinder. Since the contes
Schurbon Engine and Machine
203 South Clark St • Maquoketa, IA 52060
Mid America Racing Engines
1945 W 18th St • Washington, IA 52353
Since the Chenoweth/LaRoy entry failed to qualify, we didn't enforce the teardown rule, bu
Note the Comp solid-roller camshaft and valvesprings, this engine was ready for action.
Since our contest, the Chenoweth/LaRoy entry was repaired and dyno'd at a different facili
Chenoweth Speed and Machine
368 Erie Ave • Morton, IL 61550
P.O. Box 969 • Challis, ID 83226
30 Gasoline Alley Suite A • Indianapolis, IN
4651 Culley Lane • Jackson, MI 49201
B&G Speed and Machine
140 East Old Plank • Bargersville, IN 46106
Lights, Camera, Action
Do you think you have what it takes to compete in the AMSOIL/Mopar Muscle Engine Challenge? The rules for the 2011 contest were announced at the Performance Racing Industry tradeshow in Orlando, Florida, and are already on our website for you to check out. Remember that we take entries from shops both large and small, and it doesn't require a huge budget to compete in our contest. In fact the rules of the 2011 Engine Challenge limit the builders to a budget of just $5,500.00. So log onto moparmusclemagazine.com and download an application. We might just make you famous.