Where can I buy a check valve?
 

That opens up under boost?

Nik

I don't know if this is what you're looking for
 

but I found it on Powerdyne's website. Take care, Keith

http://www.proficientperformance.com...ode=A10261-011

Thanks, that's exactlt what I was looking for. Sorry to say but this is a ripoff! 140$ for a plastic valve.

BTW this is for using a supercharger with SD. I wonder if a PCV valve would work?

Nik

That setup doesn't use a T fitting. Seems the valve assembly does it for you. The setup I was thinking of using was a T with the valve on one end.

Nik

Are you suggesting I convert to MAF :D
Nevermind though, I located some!

Here's my situation. I want to install an A-Trim (around 6psi max) on my Speed Density '87 Mustang. The problem is that around 3500rpm the engine will bogg and I might also experience idle problems due to the MAP sensor not beeing able to read boost. In order to rectify the situation, I need to install a check valve on the vaccum hose between my intake and MAP sensor.

Note: Under boost the FMU will variate the fuel pressure.

My question is, what cracking pressure should my valve have? A low one like 0.8 psi or higher like 2, 3 or 4 psi?

thanks,
Nik

No. Scroll down.

Yes, I saw thoses. they are BOV's... I was refering to a check valve to put between the intake a MAP. For a supercharge speed density application...

Now my question is; what cracking pressure should it have? 0.8, 2, 3, 4 psi?

nik