Nissan RB Engine Bore & Stroke

[Admin]

The stock dimensions for common RB engines;

RB20 - 2.0 L (1998 cc, bore: 78.0 mm, stroke: 69.7 mm)
RB25 - 2.5 L (2498 cc, bore: 86.0 mm, stroke: 71.7 mm)
RB26 - 2.6 L (2568 cc, bore: 86.0 mm, stroke: 73.7 mm)
RB30 - 3.0 L (2982 cc, bore: 86.0 mm, stroke: 85.0 mm)

Feel free to add common Strokers if you wish.

[mcfly]

Jun RB27 - 2.7L (2700cc, bore 87mm, stroke: 75.7)

Compression ratio 8.4:1 with 1.6mm head gasket

Crankshaft weight - 21.5KG (standard oem 20 KG)

121.5mm rods

[DrMango]

RB20 - 2.3 L (22xx cc, bore: 82.0 mm, stroke: 71.7 mm)
RB20 - 2.4 L (2334 cc, bore: 83.0 mm, stroke: 73.7 mm)

Rb20 - Nissan Built
Rb21 - 80mm Pistons In Rb20
Rb22 - 82mm Pistons In Rb20
Rb23 - Rb25 Crank And Rods W/ 82mm Pistons In Rb20
Rb24 - (two Ways Known To Me) Rb26 Crank And Rods With 82mm Pistons In Rb20 Or Rb25, 26 Destroked With Rb20 Crank And Rods
Rb25 - (two Ways Known To Me) Rb26 Stroker Kit Crank And Rods With 82mm Pistons In Rb20 Or Nissan Stock
Rb26 - (two Ways) Nissan Stock Or Rb26 Crank And Rods In Rb25
Rb27 - Various Stroker Kits For Rb26
Rb28 - Various Stroker Kits For Rb26 With 88mm Pistons
Rb29 - Various Stroker Kits For Rb26 With 90mm Pistons
Rb30 - (multiple Ways) Nissan Stock Or Rb30e Block Mated With Rb20, 25, Or 26 Head (for Dohc Version)
Rb31 - Rb30 With Rb25 OR RB26 Pistons
Rb32 - Rb30 With 88mm Pistons
Rb33 - Rb30 With 90mm Pistons

taken from another forum

Kyle