Choosing the right combination of piston and domes based on your crankshaft ratio and cylinder bore is essential to performance. These components influence compression ratio, cylinder squish, and ultimately engine performance and reliability.
Here is a handy chart to get you on your way:
| CRANKSHAFT | CRANK | CYLINDER | PISTON | DOMES | NOTES |
|---|---|---|---|---|---|
|
Stock size: 54 mm stroke 110 rods |
PC350 | STOCK 64.00-65.50 |
- VITO'S 9439 |
Standard bore, 13 degree | .020 base gasket (OEM size) |
|
Stock size: 4mm short rod stroker; 58mm stroke, 110 rod |
PC3504 | STOCK 64.00-65.50 | WISECO 513 VITO'S 9439 VITO'S 9440 |
Standard bore, 13 degree | Use with VITO'S #63 Spacer Plate (with 2x .020 base gaskets) |
| PC3504 | STOCK 64.00-65.50 | WISECO 513 VITO'S 9439 VITO'S 9440 |
Standard bore, 13 degree +2mm VITO's STROKER DOMES |
NO SPACER PLATE, .020 base gasket | |
| 4mm stroker long rod: 58mm stroke, 115mm rod Vito's Performance crank: PC3504L |
PC3504L | STOCK 64.00-65.50 | WISECO 11882 | Standard bore, 13 degree | NO SPACER PLATE, .060 base gasket |
| PC3504L | STOCK 66.00 | WISECO 11882 | Big bore, 13 degree | NO SPACER PLATE, .060 base gasket | |
| PC3504L | STOCK 64.00-65.50 | WISECO 795 | Standard bore, 13 degree | Use with VITO'S #63 Spacer Plate | |
| PC3504L | STOCK 64.00-65.50 | WISECO 795 | Standard bore, 13 degree, +2mm VITO's STROKER DOMES |
NO SPACER PLATE, .020 base gasket | |
| PC3504L | STOCK 66.00 | WISECO 795 | Big bore, 13 degree, +2mm VITO's STROKER DOMES |
NO SPACER PLATE, .020 base gasket | |
| PC3504L | STOCK 66.00 | WISECO 573 | Big bore, 9 degree | NO SPACER PLATE, .060 base gasket | |
| Stock stroke, long rod: 54mm stroke, 115mm rod | N/A | STOCK 64.00-65.50 | WISECO 795 | Standard bore, 13 degree | NO SPACER PLATE, .020 base gasket |
| 58mm stroke, 115mm rod - 421cc | PC3504L | CUB 68mm | WISECO 573 | BIG BORE, 9 degree | NO SPACER PLATE, .012 base gasket |
| 10mm 64mm stroker, 115mm rod 465cc | N/A | CUB 68mm | WISECO 573 | BIG BORE, 9 degree | NO SPACER PLATE, .012 base gasket |
| 54mm stroke, 110mm rod 392cc | PC350 | ASSASSIN 68mm | WISECO 11917 | BIG BORE, 9 degree | NO SPACER PLATE, .020 base gasket |
| 58mm stroke, 115mm rod - 421cc | PC3504L | ASSASSIN 68mm | WISECO 12198 | BIG BORE, 9 degree | NO SPACER PLATE, .020 base gasket |
To use this chart, begin by determining crankhaft stock size by stroke and rod combo, then:
- Match pistons and domes based on bore size and desired squish (13° for stock, 9° for big bore, etc.).
- Adjust base gasket thickness and add a spacer plate if needed.
- Confirm compatibility with your head, bore, and configuration before ordering.