GEN III HEMI
Multiple Engine Masters Challenge winner Tony Bischoff is always a serious player, and he blasted the crowd here at Amsoil Engine Masters 2014 with a trouncing dyno pass that put him in the distant lead in the qualifying sessions at the end of Day 4 with just one more engine to qualify after him: Jon Kaase’s Boss 404. This year Tony brought a Mopar Gen III Hemi based on a production 5.7 block, with the displacement pumped to
401 cubes via a 4.050-inch stroke Eagle crank. Tony tells us one of the most attractive features of the Hemi is the dual-spark-plug system, which he credits for dramatically reducing the timing requirements, thereby improving the engine’s efficiency. An intimidating fabbed belt-drive dual distributor set up fires it off. TriTec cylinder heads prepped by Bischoff handle the flow, supplying 360 cfm of peak intake airflow. A Drag Pack style manifold feeds the heads, and although the tall manifold was bunged for EFI, Tony found a Holley carburetor produced a higher competition score.
On the dyno for qualifying, you could sense the tension in the Bischoff team. With the first pull of the dyno control handle, it was pretty clear this one was going to be a contender. As the numbers rolled in, some quick math made it clear that this engine had the field covered. Bischoff proceeded to rip off three quick pulls, and it was done. Using less than seven minutes of the allotted 35, Bischoff had the numbers he needed to mow down the field, turning a score of 2992.1, smashing the next best scoring engine by an advantage of 90 points. The engine produced peak numbers of
689 horsepower and 612 lb-ft of torque in the process. Numbers like that just don’t happen with only 401 cubic inches on hand with only 6,500 rpm to do it in. The display of power here was unreal.
Builder: Bischoff Performance Engines
Engine Type: Gen III Mopar Hemi
Claimed Displacement: 401 3.968×4.050
Block: OE Mopar
Compression Ratio: 11.4:1
Crankshaft: Eagle with 2.00-inch pins
Connecting Rods: Eagle 6.125
Pistons and Rings: Custom forgings, Total Seal 1.2/1.2/3mm
Camshaft: Comp Cams custom hydraulic roller, 240/245 duration at 0.050, 0.800/0.800 lift, 104-degree lobe separation angle.
Cylinder Heads: ThiTex heads CNC ported by Bischoff
Intake Manifold: Drag Pack casting ported by Bischoff
Carburetor: Holley
Headers: stepped 1-3/4 to 1-7/8 to 2-inch, 2-3/4 collector diameter
Amsoil Oil: 5w20
Average Peak Horsepower Over Three Pulls: 688.67
Average Peak Torque Over Three Pulls: 611.67
Score: 2992.1
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OR
Who expected a Gen III Hemi to come in and put the smack-down on Jon Kaase’s 599ci Boss Ford? That’s what just happened here at Engine Masters 2014, where Bradley Built Engines just took the top spot in Day 4 of qualifying, bumping the big Boss to second spot. There are still a few more heavy-breathing engines yet to come, so hit this link to follow along and see how well the Hemi holds out.
One look was all it took to recognize that Bradley Nagel’s Gen III Hemi was going to be a serious competitor in the 2014 Engine Masters Challenge. From the towering Mopar Drag Pack intake to the layers of high-tech electronic engine controls, this engine was destined to display the potential of Chrysler’s new Hemi. The Fuel Tech EFI system worked fuel and spark at each cylinder individually, while a full array of digital displays showed the numbers as the data logging system recorded all. Mechanically, it had a factory 5.7 block taken to 417 cubes with a 4.250-inch K1 crank. An LSM hydraulic roller delivers 0.850-inch lift – more than enough to tap into serious flow from the ThiTek worked production 6.4L heads.
During the 35-minute Engine Masters dyno qualifying session, the mighty Mopar immediately displayed a show of force, crowding the 700 horsepower mark right out or the chute. With tuner Scott Clark working the keyboard, the high-tech Hemi poured on more power with each click of the keyboard. Taking advantage of a rule allowing time saved during qualifying to be added to the team’s clock in the finals, Bradley stopped the clock midway through the qualifying dyno session to give him more time to fiddle with it during the eliminations. With 709 peak horsepower showing, Bradley’s engine made its point, while the 2892.5 score was enough to capture the lead in the present standings. This Hemi is going to be an engine to follow as we get into final eliminations on Friday.
Builder: Bradley Built Engines
Engine Type: Gen III Mopar Hemi
Claimed Displacement: 417 3.950×4.25
Block: OE 5.7L Mopar
Compression Ratio: 11.50:1
Crankshaft: K1
Connecting Rods: Information not provided
Pistons and Rings: Speed Pro and Total Seal
Camshaft: LSM hydraulic roller, 240/248 duration at 0.050
Cylinder Heads: ThiTek, ported
Intake Manifold: Mopar Performance, ported
EFI: Fuel Tech
Headers: 1.750 to 1.875 step, 3-inch collectors
Amsoil Oil: 5w20
Average Peak Horsepower Over Three Pulls: 708.67
Average Peak Torque Over Three Pulls: 614.33
Score: 2892.5