1jz pistons in 1.5j motor

[Wildsupra]

Im currently building up my 1.5j motor, well getting it underway anyway.
Im wondering about the clearance issues on using 1j pistons in the 2j bottom end and the 1j head.
Reason for lookin to do this is to raise the compression slightly. The 1jz pistons dont seem to have the dish the 2jz ones do however still have the same valve reliefs.
Can any1 confirm that they will clear the valves?
Also does anyone know how much more compression i will actually get? Basically is it not worth the hassle?

Cheers
Matty

[Smokey228]

Does the 2j make the extra 500cc through stroke or bore? I woulda thought bore...

Cheers,
Jase

[Wildsupra]

extra stroke
hence the blcok being an inch or so taller.
both pistons finish flush with the top of the block so im sorta assuming they have to clear......

There was a detailed thread comparing 1jz 2jz bores strokes piston head chamber displacements etc etc but im stuffed if i can find it again, any1 know where it at or wot it was called??

Cheers
Matty

[Smokey228]

I googled and found one at supramania.com

Googled, 2j piston vs 1j piston...

Cheers,
Jase

[Wildsupra]

cheers

Matty

["Z" UTE]

Piston pin height would be the main area to check.

cheers Chuck.