PRODUCT DESCRIPTION
Cast Crank / Forged Dish Pistons
CI: 418
Crank: P5007256 (6-Bolt)
Crank Stroke: 4.000"
Rod: SIR6123CB (0.984)
Rod Length: 6.123
Rod Style: I-BEAM
Piston MFG: DIAMOND
Piston Class: FORGED
Type: DISH
Bore: 4.070
Comp. Ratios
60CC: 11.2
65CC: 10.6
70CC: 10.1
Crank:
These Mopar Performance special heavy-duty cast steel crankshafts feature radiused fillets for the small block engines, and a 6-bolt pattern on the crank flange. Whether you're pulling or drag racing, these affordable cranks will get the job done.
Rods:
Eagle ESP H-beam connecting rods. Their 2-piece, forged, vacuum-degassed, 4340-certified steel construction provides outstanding strength, while still weighing much less than stock rods. Each rod is multi-stage heat-treated, x-rayed, sonic-tested, magnafluxed, 100 percent machined, and shot-peened to stress-relieve the metal. The rods have precision cap alignment sleeves to positively locate each rod cap, silicon bronze bushings for floating pin models, and are available in stroker models that allow additional cam-to-rod clearance for large stroke combinations. They come standard with 190,000 psi rated 7/16 ARP 8740 (750 Horsepower rating) and 230,000 psi rated, 7/16 ARP 2000 rod bolts (1200 horsepower rating). Each set includes Instructions and rod bolt lubrication.
Pistons:
Small Block Mopar Street/Strip Diamond Pistons are designed to fit most OEM open and closed chamber heads and will work with aftermarket Edelbrock & Indy heads. Can be used with small nitrous applications. Ratios are configured for .018" -.025" deck height @ 9.600". Standard 1/16" x 1/16" x 3/16" ring package (Rings not Included). Premium 8620 wrist pins are included. Gasket volume= 8.9cc, Top ring down from piston crown .310", Max valve diameter 2.070" intake and 1.625" exhaust valves. Valve relief depths .292" intake and .224" exhaust.
Bearings:
H series rod bearings have a medium level of eccentricity, high crush and rod bearings have a hardened steel back and thin overlay. These bearings also have enlarged chamfers for greater crankshaft fillet clearance and are made without flash plating for better seating.
P-Series main bearings are the oldest members of the Clevite 77 bearing family and are intended for high-revving engines. To compensate for the high-load factors and distortion in these engines, these bearings have higher eccentricity and a high crush factor. P-Series bearings are built on steel backings with extra-thin overlays to prevent overlay fatigue. In addition, the oil grooves on most applications extend all the way around both halves for better oiling.
