Originally Posted by
costina
What car? Twin piston is for airflow metered cars single for cosies etc. the only real world difference with a twin piston on a cossie is the lack of whistle on idle. With a single it remains open at idle.
I think they are ok but would be better with some kind of filter imo
I use a single piston on my cossie.
My car doesnt use an airflow meter, but i was just checking it would be ok to use a dump valve designed for one. Just means all of the air will come through the turbo when idling etc i guess.
Thanks for the reply.