Thanks Travis (Trav4011 - fi-r.net)

Here's a list of data he's compiled over the years, pertaining to the QR25DE (02-06) engine..


Bore- 89mm (3.504")

Stroke- 100mm (3.937")

Deck Height- 225.5mm (8.878")

Compression Ratio- 9.5:1

Piston dish volume- 10.1cc

Compression Height- 32mm (1.259")

Wrist pin diameter- 19.98mm (.787")

Crevice volume- .3cc

Head gasket squished volume- 4.1cc

Piston below deck volume- 3.7cc (amount of space occupied from the top of the deck, down to the piston's top)

Rod length (center to center)- 143.03mm (5.631")

Small end diameter- 19.98mm (.787")

Big end diameter- 47.8mm (1.887")

Small end width- 22.8mm (.898")

Big end width- 22.8mm (.898")