wiseco piston to bore clearance

[brad92t]

I just got my wiseco pistons in today! Shiny!

So anyway this sheet that came with them says 0.0025 for the piston to bore clearance.. well that seems a little tight for a forged piston to me! I searched around and I see no real solid info for these pistons. Some recommendations between .004 and .005.

remembering that they are coated, what have you guys been running on your wisecos?

 

[gixxer750]

I'm running the recomended slack. I love it, no pistons slap...even cold. It doesn't set the knock sensors off, and the engine just sounds good. I've run 22 psi of boost and haven't had a problem yet.

 

[brad92t]

and you're making 251 rwhp

 

[quake]

the coating is half a thou so i would set it for 3 and a half thou when the coating wears away you will have 4thou. 2618 needs room to expand or u run risk of scuffing the pistons besides what happens when u build the thing and want another 100rwhp in a year?