97 M45 Check Valve
 

Hi everyone! I just finished up the install of an m45 on my 97. It has the Sebring timing box and powercard pro. I think I may have an earlier-year kit as the supercharger doesn't have jackson racing logos on it, it's just plain metal. Also, the ISC line that wraps around from the dummy throttle body to the intake elbow has no check valve on it. Using an autometer boost gauge I'm seeing 4-5 psi max (but the guage rests a little less than 0psi when the car is off so I don't know if the calibrations are just wrong). I was wondering if a check valve should be added to the ISC line? Thanks!

Just wanted to follow up with this and say yes, the check valve makes a difference. It goes up to 5-6psi now.

*sighs and adds yet anothet thing to the list of things to buy*

Did you get the $20 or so valve I have seen around?

I got the $18 one from Advance. It's part no. 5012791. I then had to go to lowes and buy 2 hose adapter fittings so that a hose could hook up to both sides instead of just one (this check valve has a screw input on one side and a vacuum nipple on the other). I'm sure you could just find and order the one that has a nipple on both sides though (don't know where).