Quote Originally Posted by Mikey View Post
Would valve work see a good amount of gains? I know my builder mentioned he has a rottler in house and usually doesn't port unless he's doing high compression large cam builds as he can get you about 80% there without a pair of CNC heads
I don't know how your combo would respond to additional valve work. I'm sure companies like PreFix/Calvo...etc. know the perfect recipe with our heads because of many hours spent on a flowbench and dyno. I'd guess that's what you're paying for when you use those guys.