PPP Race Hemi Stroker Short Block

Not for the faint of heart. This is for Off-Road Race Applications only for the serious racer. These blocks come standard with 0-Rings, Billet Caps, Gas-Ported Pistons, and partially filled with a block filler unless requested otherwise.

 

The short block assembly is one of the most critical procedures in any engine build. No one understands that better than Power Ported Performance. Power Ported Performance was founded with machinist and tool & die makers that have manufactured anything from precision gauges to jet engine parts. Their ability to utilize equipment, tooling and knowledge from these areas simply isn’t feasible for standard engine shops.

In an industry where close is good enough, PPP takes a different approach. We believe the best method is a solid foundation. If the block and short block assembly is done right, then bolt on power upgrade can be added in the future. As your desire for performance increases, the money can be spent on the upgrade and not on the short block again.

All of our builds start with bare 6.1 block from Mopar. This is the same block that is running in excess of 1,000hp in other vehicles across the country. The crank is micropolished using a 15 micron belt, cleaned and checked using mitioyo inspection gages. With all of our blocks being align honed, the bearing bores for the crank are perfectly straight and sized to match the crank journal diameters. The align honing is a step that the majority of industry chooses to skip due to added costs.

All of the bearings are miked for thickness and matched to each journal/bore combination to achieve perfect clearance. No plastigage is used, due to inaccurate reading.

We offer several connecting rod choices depending on the intended use of the engine. No short cuts are taken due to the rod being the second highly stressed part in the engine (behind the valve spring). We offer the rods with different journal sizes, 1.850, 2.000, and 2.100, as well as .866 and .927 wrist pin options. The rods are the top of the line offering and are the same as used in pro race cars. Each rod is inspected, re-torqued for repeatability, and sized for exact clearance.

Whether you choose a shelf stock or custom piston, we can provide it. Each piston is miked, pin fitted and inspected. The cylinders are torque plate honed to fit each piston. Each piston ring is file-fitted to the cylinder it is going in for an exact ring gap to minimize leakage.

The assembly is done one at a time using dedicated tooling and inspected after each step. The same dedication goes into a street engine as goes into our race only engines. A documented blueprint sheet is provided with each assembled block. It is possible to throw the parts together and run for a while, just as you can drive on a bent rim if you put enough weights on it, but we choose to do it right the first time for maximum horsepower and durability.

PPP Performance shortblocks come standard with ARP main studs (Head Studs Optional) as well as top of the line rings, which include a 1.2mm Alloy steel gas nitrided postive twist top ring, a 1.2mm cast iron phosphate coated taper faced under hook second ring, and a 3mm 3-piece oil assembly stainless steel flex vent spacer and chrome faced rail Oil ring.

The pistons are 2618 alloy with strutted skirt designed to run as little as .004" clearance with excellent skirt wear and minimal noise or rock. The valve pockets are radiused for detonation resistance and increased flow around the valves. Anti-detonation grooves give the added benefit of keeping the top ring groove free of carbon. 3mm oil rings for better oil control and reduced friction for more horsepower. Pressure grooves for enhanced ring seal. Chrome Moly pins and spiralox (tool steel pins optional). Skirt coatings for lower friction, reduced noise, and superior life.