Saleen S281
forum member
I saw a segment on "Engine Power" tv show talking about horizontal gas porting pistons to increase the seal of the top ring. I did a search and nothing came up. Anyone ever do this on their build?
It's a combo of a Napier second with a gas port and a vac pump to net some good results. Usually see side gas port on a round e round combo or a heavy power adder car. N/A combo's generally use the top gas port as it is more efficient.
Thanks Bruce,that's pretty much what they showed, ever build a 3v with these? Pros/cons?
I have them. Race application, 16:1 compression, 8200 rpm. Total Seal ring set.
Not for daily driver stuff. N/A race applications, yes.
Does this effect ring wear yes. What kind of cycle life are guys running on these combo's? Sure if you are doing a rebuild for a driver your not going to gas port the Sealed Power pistons that came in your $too cheap refresh kit that you plan on putting 100K miles on.
But that vertical gas ports are a n/a race engine thing mostly