Custom Ford F250 Powered by Cummins - Rolling Circus

Tag : titanium block

To make the four-digit power numbers that he was looking for, Adamknew he needed a sturdy foundation. Since he has his own company,Central Michigan Performance Diesel, he was off to a good start.Adam first built a stud girdle for his 5.9L Cummins engine (whichcame from a wrecked '94 Dodge) and then put 14mm main studs intothe block. Everything was balanced, and a set of 16:1 compressionMahle pistons were installed and fly-cut. Up top, a Scheid pullingcam and 24-valve tappets help move the air in, which comes courtesyof a heavily ported 12-valve head that Adam says flows more airthan the later 24-valve version. Since the engine would be spinningat more than 4,000 rpm, a set of 60-pound exhaust springs,aftermarket valves, and titanium keepers were added.
With a stout bottom, middle, and top of the engine, Adam now turnedto air and fuel. Last year, Adam dyno'd at 661 hp with nitrous, anumber that he was very unhappy with. It turns out the originalinjectors were installed as the result of a mix-up. Oops. With aset of 5x.018 injectors by J&L Machine and a hopped-up P-pumpflowing 650 cc of fuel, the big Ford made 1,111 hp with a singleturbo. Now things were looking good. Since Adam had never been downthe dragstrip before, he decided to give it a shot. The trucklaunched hard and went through the eighth-mile traps at 99 mph. Bythe end of the quarter, it was clear that something was wrong asAdam coasted through in 11.43 seconds at 107 mph. Adam's trip downthe strip turned into a $3,000 run, as his Ford twisted a billettransmission input shaft and then blew up the turbo. After hisfirst (and only) 11-second pass, Adam decided that his 7,820-poundFord might be better suited for pulling, dyno runs, and 60-mphrolling burnouts than for drag racing.