Check valves = boost leak?
 

Why wouldn't it be better to put the check valves in series with the arrows pointing toward the throttle body instead of venting them to the atmosphere?

Re:Check valves = boost leak?
 

the whole point of checkvalves (on an fmu setup) is to vent off boost so the map doesnt read it

Re:Check valves = boost leak?
 

The valves are one way...right?

If you put them in-line...Wouldn't it do the same thing but without the leak?

Re:Check valves = boost leak?
 

yes...but ive never used checkvalves so im just speaking theoretically

Re:Check valves = boost leak?
 

I have tried it. It dosnt work. Just enough pressure gets past the valve before it closes and it sets the check engine light. What I did was use a check valve from the smog era chevys. it has one port on one side and 2 on the other. on the side with 2 ports you connect the map and a check ball type valve that is adjustable. when the valve sees boost it closes and the other check valve opens letting out any pressure. Plus the map is reading
the atmospher outside. Its not perfect but it works.

Re:Check valves = boost leak?
 

yea i guess the movement of the valve as it closes puts enough pressure on the map to trip a cel...hmm

Re:Check valves = boost leak?
 

i think thats y u add more check valves ;D, iseen a guy runing 6 check valves to stop a code.

Re:Check valves = boost leak?
 

what about this idea? just drew up a quick diagram...
http://www.shownglow.com/2-cv-idea.bmp

Re:Check valves = boost leak?
 

looks good to me, but ive never done anything like that

Re:Check valves = boost leak?
 

I haven't either.

I'm not planning on using an FMU set-up, but the thought just came to mind.

I think that if you put several in series it might work.

I'm not sure of how much of a benefit one would gain by using the check valves in this way, but it seems that it would be better to have a system that doesn't have a boost leak as part of the design.