anyone successfully using a single piston dump valve

[p fandango]

So it looks like the Kinugawa dump valve is a single piston one, i know the rule is you use a twin piston if you've got a MAF but wondered if anyone's used a single piston one & got away with having no issues from it

[nottsgreent5]

Will run fine till it dumps then lamba light and poor tick over will happen lol

[p fandango]

blanking plate it is then lol. I'm surprised they stay open after dumping the excess boost, especially as they come with different rate springs so can control the pressure it opens & closes at

[t5 pete]

I once tried a single piston one and no ill affect many moons ago

[FIREBOLT]

My S40 has a single piston, I don't have a MAF or Lambda sensor so get no problems.