I'm running .010 in mine. Drag car with Venolia 4.505 bore x 4.25 stroke.. 14.75:1--B1's.. Aluminum low deck Indy block. 6.535 GRP rod..

When I asked Tom Prock, he said .0085-.011 on my application..

Leakdown has been great, and no smoke.. Also no noise from slap on start up.


Chris..