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A LIGHTWEIGHT, 700HP 7.3L…

…EVERY COMMONRAIL’S WORST NIGHTMARE

Pushing the limits of a stock engine is what diesel performance is all about. Unfortunately, some of us find out sooner rather than later exactly how much abuse a factory rotating assembly can handle. With a set of big hybrid injectors and an S369 SX-E bearing down on it, the 190,000-mile, stock, bottom-end 7.3L Power Stroke in David Keyser’s ‘97 F-250 decided it’d had enough just eight minutes after being started. But instead of throwing in the towel, David decided to pull the engine, overbuild it, and enjoy his horsepower upgrades reliably.

Long-Haul, Big HP 7.3L

To ready the 7.3L for maximum longevity, the block was sent to the machine shop side of the local Ford dealer, where it was prepped to accept a main cap girdle and valve-relieved, standard bore pistons, both of which came from Irate Diesel Performance. The rest of the rotating assembly would consist of the factory-based crankshaft and Manley Performance’s forged-steel rods. With the block at Ford, the heads took a trip to Crutchfield Machine for light port work and a performance valve job. Complementing the added airflow of the heads is a Stage 2, billet drop-in camshaft from Colt Cams, while ARP studs make blown head gaskets a non-issue.

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About Diesel World

Diesel World December 2019, New Drop in Turbo, BUILD IT RIGHT, The 2016 RAM has all, Vintage Diesel : 2 Powered rides from Yesteryear, And More....