The length of the con rod centre to centre is 135mm.

Thanks mate.

Kev

Do you have a copy of the measurements still?
Also what is the maximum size of stroker crank to give 13.5:1 compression?
I guess the limiting factor is the piston skirt length.

The 660z is running fine at the mo with the new tight crankshaft key; but when it does go, would definitely look at a stroker big bore crank and piston. As well as changing out bearings and inspecting / replacing gears.


Many thanks

Fergus

Sorry I don't, we used 5mm stroker & you make any compression you want you just got to calculate the CR. Over 12.5:1 you cant use pump gas you need race fuel. https://www.ebay.com.au/itm/Raptor-7...04kD:rk:2:pf:0