Crankshaft

Stroker Information
To build a 334cu in stroker, use a SBC 305 cylinder block bored to +.030”, together with a 3.75” stroke Eagle crankshaft [not 400], and 5.7” conrods. Pistons are PP-BYKB186030, and rings PP-BYC3817030. A 400 externally balanced harmonic balancer & flywheel will also be required. All parts need balancing.

To build a 377cu in stroker, use a 400 SBC used block or a Dart PP-BY31152211 cyl block, and bore to 4.155”, use a 3.48” Eagle crankshaft, and 6” conrods. Use forged pistons PP-BYKB762030 with rings PP-BY3150032035, & bearings PP-BYCB663VN & PP-BYMS1038H. This engine is ideal for a higher revving Race engine.

To build a 383cu in stroker, use a SBC 350 cyl block, bored to +.030”, together with a 3.75” stroke Eagle crankshaft [not 400]. If you use 400 [5.565”] conrods, then you can use 350 pistons. 5.7 & 6.0 conrods can be used, but be sure to match up to the correct “height” piston. Different compression ratios can also be obtained. If you are using an externally balanced crank, then a 400 externally balanced harmonic balancer & flywheel will be required.

To build a 427cu in SBC stroker, use a Dart PP-BY31122222 tall deck [9.325”] cyl block & finish to 4.125”, together with a 4.00” stroke Eagle crank and PP-BYAJG580 Eagle 6.20”; “H” beam conrods with ARP 2000 bolts. Forged pistons are PP-BYAJG590, rings are PP-BY3150073005 Perfect Circle “Firepower” PP-PC479, together with a set of PP-BY303-0319 3mm oil rings. Bearings are Clevite PP-BYCB663VN, and BYMS1038H. Conrods are good for 1100bhp.

To build a 496cu in BBC stroker, use a std deck [9.80”] 454 block, & bore to +.060”, together with a 4.25” stroke crank, and 6.385” conrods. Add the appropriate pistons & rings suitable for your purpose. With a cast crank, use bearings PP-BYCB743P, and PP-BYMS829P. With a forged crank, use bearings PP-BYCB743H, and PP-BYMS829H. The cast crank & “H” beam rods with 8740 bolts is good for 700bhp. If you are using a forged crank, & the “H” beam rods with the bolt upgrade, the kit is good for 1500bhp.

To build a 540cu in BBC stroker, use a 502 GM block, or a Dart BY31273344 cyl block, & bore to 4.50”, together with a 4.25” stroke crank & 6.385” conrods. Add the appropriate pistons & rings suitable for your purpose. With a cast crank, use bearings PP-BYCB743P, & PP-MS829P. With a forged crank, use bearings PP-BYCB743H, and PP-BYMS829H. The cast crank & “H” beam rods with 8740 bolts is good for 700bhp. If you are using the forged crank, & the “H” beam rods with the bolt upgrade, the kit is good for 1500bhp.

To build a 572cu in [9383cc] BBC stroker, use a Dart PP-BY31263454 tall deck [10.20”] cyl block, and finish at 4.50”, together with a 4.50” stroke crank, and the 6.535” L19 bolted conrods. Select the pistons and rings that best suit your purpose. 1500bhp ok. Use bearings PP-BYCB743H & PP-BYMS829H. This kit is good for 1500bhp, naturally aspirated, and possibly more with a Turbo or 2.

All the above information is based on parts we sell, only. Remember, all reciprocating parts must be balanced, and you must check the oil clearance existing between the crank & the bearings. Crank, rods & pistons, must clear the block, & each other, by a minimum of .060”.