10/08/2024
Big valve X.Flow head in for a bit of service work from a customer to recut seats and assemble with some new bits. I will just add this is not one of our heads but from another tuner. Head previously had no top cut on all seats so this time we added a top cut and the exhaust went up around 6% over the entire range. The inlet was a different story. In a couple of places it went down .4% but picked up again in the middle and would still not hold on at the top. This is partially due to us running it on only a 84mm bore fixture and it is slightly shrouded. The the short side is probably not quite where I would have for a cam with more lift. We were asked to just blend and test not reinvent it. This is one of the reasons we only use a 1.6" inlet and not larger even on a 2L headed version as there is no gain. So, head numbers are showing good for 160hp+ with the right bits bolted to it. Head will be re assembled with new double springs, seals, steel spring caps and is for sale by the owner so if you are interested let us know and we can put you in touch.
