The engine has been in the truck for about four months now, and the Magnum motor was run on Pacific Performance Engineering's chassis dyno and produced some good numbers. The 408 Magnum stroker engine recorded a 543.9 hp at 5,200 rpm. This motor puts out that amount of horses and 565 lb-ft of torque, according to Pacific's dyno charts. The truck is a fully outfitted, streetable machine that has run 11.80 times and will now be fitted with a rollcage for the strip. Thus far, this motor has proven that it does make some serious horsepower.

Speed (RPM
Torque (lbs./ft)
Horsepower
3,500
477.58
319.40
3,600
487.46
334.08
3,700
493.24
347.07
3,800
507.23
366.25
3,900
524.08
388.84
4,000
532.98
406.13
4,100
540.50
422.58
4,200
544.46
435.29
4,300
550.57
450.66
4,400
553.91
463.59
4,500
557.38
477.75
4,600
560.73
491.44
4,700
561.23
502.12
4,800
565.02
516.48
4,900
561.40
523.87
5,000
557.71
531.11
5,100
556.86
540.84
5,200
554.25
543.90

SOURCE
The Fastman Performance Products Thunderhead Racing
Kirts' Engine Machining Lofgren Auto Specialties
18130 Dahlia St. NW
Cedar
MN  55011
7-63/-753-7573
Southeast R/Ts