Al, no I do not measure “before and after”; it’s measured at block output near standard oil filter pedestal and is feed to PSRU input … see attached (this photo  shows the first  cooler input, the pressure sender and the return line from second cooler) … if I understand the oil flow correctly, this is after the coolers.

My max oil pressure was 80 psi when I had one cooler and is still max 80 psi with 2 coolers – typical operating pressure is 75 psi at 5500 rpm.

Jeff

 

 

Mark, I have two of the DB-30416, single-pass coolers … no measureable pressure drop with 2 in series … I’m seeing 80 psi max with the 13B.

JWW

 

What do you mean “ . … no measurable pressure drop”?  Are you measuring pressure before and after the 2 coolers?

 

Al G