Interesting David Vizard video on anti reversion
- Thread starter MikeP
- Start date
Davidmgbv8
Supporter
Good video
Davidmgbv8
Supporter
Good video to watch
Interesting video. Combine all that with port dimples and firing order grouping of header primary tubes in the collector and, well, you might be back where you started or might be making 20% more power. I thought the step machined into the head of the valve was interesting, but I wouldn’t recommend that for anything other than an all out racing engine that gets frequent disassembly and inspection…
There was a header manufacturer back in the 80’s that made headers with AR cones. Blackjack I think. I did install a set on a 4x4 Chevrolet, but with no dyno testing (customer didn’t want to pay), we really didn’t know if they worked as designed or not.
There was a header manufacturer back in the 80’s that made headers with AR cones. Blackjack I think. I did install a set on a 4x4 Chevrolet, but with no dyno testing (customer didn’t want to pay), we really didn’t know if they worked as designed or not.
