Muscle Mustangs & Fast FordsHow To Engine
Turbocharged 363 Stroker Engine Build - 200-MPH Takedown
We Show You What Goes Into Building A Turbocharged 363-Inch Stroker Designed To Push An '88 5.0L LX Mustang To 200 MPH
On the normally aspirated combination, we retained the factory fuel rails and ran a set of 36-lb/hr injectors. The turbo motor was run with 75-pounders (from Holley) and high-flow, aluminum fuel rails from Vortech. ProComp Motorsports supplied the neutral damper (the SHP short-block is internally balanced), front cover, and fabricated valve covers. Additional components included a Milodon oiling system, Hooker 1 3/4-inch Super Comp headers, and an MSD billet distributor. Run in anger, the normally aspirated 363 stroker produced peak power numbers of 519 hp at 6,600 rpm and 469 lb-ft at 5,000 rpm. Torque production from the Dart SHP motor exceeded 450 lb-ft from 4,300 rpm to 5,800. Even down at 3,000 rpm, the 363 still produced nearly 400 lb-ft of torque, so turbo spool up should be more than adequate, even with a sizable (80mm-plus) single turbo.
Speaking of turbo, we installed a single-turbo kit from HP Performance. The kit included the necessary tubular exhaust manifolds, crossover tube, and wastegate flange. It also featured a thermal barrier coating to maximize heat energy to the turbo, as well as an efficient air-to-air intercooler to maximize heat rejection. Initially, we hoped to run a 76mm Precision turbo, but we later stepped up to a larger 80mm unit from Comp Turbo to reach the desired 1,000 hp. The 76mm from Precision will likely be more than adequate for our 200-mph adventure, but we wanted a big number on the engine dyno (remember, 1,000 hp is the new 500 hp).
Turbo Smart provided a 45mm wastegate to help control the boost pressure supplied, along with one of its Race Port blow off valves to eliminate any surge when we lifted of the throttle at high rpm.
After tuning with the FAST management system, the turbo motor eventually responded with peak numbers of 1,004 hp at 6,300 rpm and 890 lb-ft at 5,100 rpm. Despite the sizable turbo, boost registered over 14 psi at 3,500 rpm, and climbed to a peak of just over 18 psi before falling off slightly to 17.3 psi at the power peak.
There was a little more power to be had from this turbo combination at higher boost levels, but we officially eclipsed the 1,000hp mark in a mild state of tune, and we're now anxious for the install. Check out upcoming issues for that and a few drivetrain upgrades before we head out for the big test. We promise it won't take a couple of years this time!