Boost and Check Valve questions...

[RedZMonte]

So i was just curious, you guys running boost on your NA motors, do you run a check valve before the FPR to keep boost from going into it? Same question for the Accum. Valve on the Auto trans?

i havnt ran one on mine ever and thinking it might be a good idea, not sure if thoes parts where designed for boost so i don't know the effect on them in the long run.... ive ran them like this for years without any real problems but what is your inputs?

S

[mfewtrail]

Shane, just for what it's worth: The Turbo Grand Prix's do not use a check valve at the FPR(same part # FPR as the NA 3.1's), but they do have a check valve before the vacuum modulator on the transaxle.



The standard check valves GM uses for the vacuum lines going to the HVAC, etc. = what these cars have from the factory. Most of us use "HELP!" part #47150 as replacements.

[RedZMonte]

Cool dude! i thought i remembered a check valve there on my TGP but its been years sence i have had it so i couldnt remember. I could just let it bleed off i would assume, it wouldnt need to be resurculated.... I would assume.... what if i just put a check valve in line so once it got into boost it just blocks all vac and boost from the modual?

S