Quote:
|
"Simon, we run our pistons with skirt to wall clearance .003 to .0035
|
Simon I am sitting here looking at the instruction sheet that I got with my Probe forged aluminum racing pistons and it is very clear about the piston to wall clearance.
N/A street cars 0.004"
Blown/Turbo/Nitrous 0.005"
Drag/Circle Track/Road Race 0.0055".
My clearance was machined to 0.005" and I have had no issues in 2600 miles of road and some track use. They also note that engines that are honed without torque plates will require additional 0.001" clearance. Also the piston diameter should be measured at the bottom of the skirt.
I can scan the sheet in and e-mail it to you if you want.