Blow off Valve yes or no

[JGTO05]

I agree with your position, but not necessarily your argument. I agree having a BOV "sound" should not be the primary concern in modding this particular vehicle. But from what I have read here and elsewhere... options like the Forge MS BPV do prevent boost leakage by replacing the factory one. So, there is a performance, if not just fixing a problem aspect to the mod.

But I wonder what kind of power this would make with the bigger turbo on it (from the spd3 or spd6? I forget). IMO this thing with 280 hp at the motor would be perfect. What is that on a FWD vehicle... like 240 FWHP? That would be a fun little SUV.

I agree that if it is leaking, by all means plug it up. If the Forge works better than the leaky stocker, then I would consider it. I had horrible experiences on my last turbo car with Forge products, but then again, I have a lot of VW/Audi friends that use them on their car. Some of them turn them backwards, which again rises my question of why? Your car runs like crap, and all you got was a "better" sound.

 

[rocketr2]

All CX-7 are automatic transmission, so you wouldnt get the bov "whooosh" sound when it shifts, only when reving.

 

[Alpha Wolf]

Well yes it is a Cross over SUV.

Yes it is not a race car.

But if something is leaking boost then correcting that is something that should be done.

More power = more fun driving (drive2) and possibly better mileage

But, due to low bang for buck, I see this as something to do only after doing those things that will boost performance more for the money.

Larger TMIC
CAI
Better Exhaust

Then BOV..

 

[satz]

how do we 'know' that the stock BOV leaks?

i've read that the Cx7's stock BOV leaks.

Was wondering how we know that for sure, and also whether or not the leak is designed to protect the engine/transmission from too much instantaneous power?

What are people's long term experiences with the various aftermarket BOVs on the CX7?

Any failures? Any real benefits?

cheers

Satz

 

[RiP 8/23/07]

Ihave a HKS SQV and I have it vta but it isn't as annoying as a manual and if I drive like a sissy I can make it so it only blows off the preliminary valve and you cant hear it... so there is minimal loss of air in the intake... no CEL after driveing it for 1000 miles already... I have the stuff for the recirc fitting but its small and I need to make an adapter for it... gas milage sucked for 2 tanks now its gotten better once the computer adjusted to it... its all worth it to pass a ricer and let off the gas and see the look on their face... I got it used for 200 with the adapter dont think I would have paid much more for it... forge may be the way to go for the money but I'm happy with mine

 

[SuperStretch18]

Had the forge valve since september. No issues, MUCH stronger throttle response. I absolutely recommend the upgrade! The link below shows that even the stock MS3 valves are leaking:

Bypass Valve Tested

Regarding whether the stock valve is meant to leak; the ecu on this car has control over EVERYTHING. There are other ways that it could control throttle, boost, fuel, etc, that are repeatable and measurable. A boost leak is not really the best way to control power in this system...

 

[satz]

Is the difference in throttle response only felt at high boost conditions?

I guess if the stock valve leaks at high boost then that would be the case, right?

Or does it really help at lower boost as well?

cheers

Satz

 

[patty AT forge]

The bulk of the problem is that the stock valve leaks at boost onset. But it also leaks at higher boost levels..

 

[satz]

any way to modify stock BOV to reduce leakage?

hi all

was wondering if there is any modification that can be done to the stock BOV to reduce/prevent the leak?

Perhaps stronger spring or something like that?


cheers

S

 

[SuperStretch18]

You could do this:

"FREE BOV's FOR EVERYONE"

I would never do it or recommend it to anyone, but since you asked...