1700 HP Procharged LSX Engine
by John Baechtel
The GM standard deck LSX block available through SDPC under PN-19417351 features the following specs.
3.880" finished siamese cylinder bores
9.260" semi-finished deck height
Capable of 364-482 cubic inch displacements
CNC-Machined Cast Iron Block
True Priority Main Oiling
6-head bolts per cylinder
Standard 4.400" bore spacing
Extra thick siamese cylinder bores
Semi-finished machined thicker decks
LS7 style 6-bolt dowel located billet main caps
Cam timing is handled by an Innovators West belt-drive. Kurt found the easiest way to provide a cam position reference signal to the computer was to fabricate an aluminum plate that holds a Holley big block Chevy cam sensor mount. To provide the sensor reference he made his own magnet with a 10-32 stainless mounting screw and drilled the upper cam drive to postilion the magnet where he wanted it. The mounting bracket kit is Holley PN-556-114.
No pictures were taken of the internals, but it is a very robust system with the Bryant billet crank, Callies Enforcer connecting rods and custom Diamond pistons. The 3.75-inch stroke was selected because it makes the crank stronger than a stroker crank due to more material connecting the throws. Crankshaft whipping is ore pronounced on a stroke and is hard on the engine, particularly the number 2 and 4 mains at high power levels. The shorter stroke revs more smoothly and it allows a 1.25 compression height on the pistons which keeps the pin from intruding on the oil ring groove.
The camshaft is a Camonics solid roller shaft speced to provide a relatively quick peak with the blower system rather than a more linear 45 degree ramp up to power. No camshaft numbers were made available. The block is bushed for .937-inch Isky lifters with a .850-inch roller. These are the bused lifter rather than traditional rollers. While the friction tradeoff with rollers is slightly more. it was felt that the bushed lifters were safer for this application.
ENGINE SPECS
1600+ HP ProCharger LSX
Scoggin-Dickey Race Shop
Engine Builder Darrell Burgoon
Blower Setup Kurt Urban
Supercharger ProCharger F-1X-12
Displacement 400-cid
Bore/Stroke 4.125/3.75-inch
Engine Block GM LSX, PN-19417351
Crankshaft Sonny Bryant Billet
Rods Callies Ultra Enforcer
Pistons Diamond
Camshaft Camonics
Rocker Arms Crower PN-74164F
Cylinder Heads BRODIX LS7, PN-BP BR 7 BS 300 PN-1178105
Valves 2.250 Intake, 1.580 Exhaust
Max Flow 437 CFM
Intake Manifold Frankenstein Engine Dynamics
Race Gas Injectors Fuel Injector Development
Methanol Injectors Billet Atomizer3
Throttle Body Wilson Manifolds 105mm PN-471105DHB
Engine Management Holley Dominator System
Cam Sync Holley PN-556-114
Timing Gear Innovators West
Balancer Innovators West
Dry Sump Pump Peterson
Oil Pan Moroso

SOURCE
Scoggin-Dickey Parts Center Race Shop
5901 TX-327 Spur
Lubbock, TX 79424
https://sdparts.com
800-456-0211