Plan on 15 gpm at 3200 rpm, Mike. -10 is not enough if expected to handle full flow without excessive restriction.
Agreed. I had this in mind when I modded the adapter so that 1/4 of the oil could still flow through the factory oil cooler if it needs. The new ones will be able to do about 1/3 or slightly more at full open on the T-stat. I'don't want any restrictions at any stage of the cooling.