Just had the head I used as a test head reflowed on Patriots bench, interesting:

Patriots bench-clay inlet, pipe outlet
.200-144/120
.300-208/160
.400-256/192
.500-265/216
.600-274/226

Tony Mamo's-radius plate inlet, pipe outlet
.200-136/119
.300-198/147
.400-246/188
.500-261/210
.600-272/223
Just info for everyone . Thanx again Gunnar and justin at Patriot , had a great visit and they have big plans for the future

 

Good stuff Bo...

I'm curious if the numbers are from the same port (very important when flowtesting a handported head). I can't recall whether I earmarked the port I flowed for you...it was many months ago. Could account for the differences in the lower numbers on the intake and the slight disparity in the middle of the exhaust curve. Either way, the peak numbers are certainly very close and the disparity in the low/midlift flow isn't huge for two different pieces of test equipment and hardware on the opposite sides of the country....

Tony M.

 

Yes, same ports but not the same production valves. I didnt have time to elaborate when I posted(had to get ready for work but have a few minutes now). The valves that was in that head then, many months ago, were stock '98 LS1 intakes and stock truck style exhausts- the valves that was in it earlier today was production LS2's(the exhaust valves are basicaly the same but not sure on the intakes). Both sets of intakes were back cut 33 degrees and both exhausts do not have a back cut(as suggested by you as you showed me the difference on the bench back when you flowed em for me- thanx again for your help as well ).

 

Also I think the clay vs. radius plate has most to do with it.

 

It was good to meet you Bo. If you need anything let us know. As you saw in person, we are very serious about the quality of our products.