racer rx

Have any of you guys replaced the Charge relief Valve?

Not the Blow off Valve... the one closest to the firewall.

Do these leak under high boost?

thanks for the replies.
jc

neevosh

The CRV is the same as the BOV. Probably the same part #.

Pressurized

I would like to know as well if these will vent under WOT? I have a problem with that right now.

Is there anyway to eliminate it completely?

NeedTwins

They bleed off the boost that the secondary turbo is making during prespool then at 4500 when the secondary comes online, it closes up and doesnt vent. Vent the CRV into the atmosphere and you'll hear it vent from about 3k-4.5k, then after that no venting. I dont think I should be eliminated. If you go non sequential or single you can eliminate i think...

Pressurized

Well I am non-seq and I notice in 5th gear around 5psi of boost under WOT my car will start to vent.

maxpesce

EDIT: _ I see you are NON seq. So you can block off the port or use the CRV as a second BOV. hook it up to the same vac hose as the BOV (use a Tee in the BOV vac line)

Pressurized

Well currently I just have taken the vacuum line off that controls it....

PSUR1

Is it possible for the CRV to leak boost from the primary turbo as well? I'm thinking not.

7-sins

It can always leak in non-seq because the butterfly flap in the Y-pipe is open so boost will flow through the whole Y-pipe not just the primary half. Get an upgraded BOV then cap it off. You probably could still cap it off with a stock BOV but im not sure how much boost it will hold w/o damage. I figure if you are running stock levels 10 then it is ment to hold that. People are even run 14 psi with the sequential setup so I dont see that hurting it that much.

rpm_pwr

oops double post

rpm_pwr

If your charge releif is venting under boost I'm afraid your problem is probably not the valve. Have a look on wargasm's hose diagram. There is a green w/ brown dots hose that goes from the secondary turbo through the LIM onto the solenoid rack. The charge relief AND charge control soloids switch pressure from this line onto the charge releif and charge control valves thus ducting the second turbo into the y pipe. When the hose pops off or leaks, the whole thing goes to **** becuase the valves just get 0psi switched onto them and they don't switch when they're under pressure.

Hope this makes sense


EDIT I cant attatch wargasm's diagram because it's about 1mb. Just do a search