hubada26

The Bypass valve is a valve between the throttle and the turbo that vents extra boost pressure. When this valve vents to the outside air, it is called a blow off valve, and when it vents back into the inlet of the turbo, it is called a compressor bypass(diverter)valve. which one would be best and is there any noise?

hubada26

anyone anyone?

jeep45238

You can easily convert a BOV to the bypass.

iamfaster

First off all, you can't vent to the atmosphere if you have a mass air meter. That air has already been accounted for. The air from the bypass valve must be routed to the intake tract, after the MAF, and before the impeller. Vortech offers three bypass valves, the Bosch valve (black plastic) is efficent only to about 9 psi. The race bypass valve (aluminum base, blue anodized top cover) is good to about 15psi,anymore boost than that and you would have to run 2 race bypass valves, or use Vortech'snew Mondo bypass valve. In order to run the race bypass valve, you would have to weld the proper flange to the discharge tube. The flange is just a standard HKS/Greddy flange.

iamfaster

Also if you run too small of a bypass valve in relation to the amount of boost, the valve will not relieve pressure fast enough and you will get a backfire in the discharge tube. The backfire will usually just blow the clamps and silicone couplings off. This is a pain because once this happens the carstalls and you must reinstall the clamps and couplings. This explosion can damage impeller blades, or like in my case, it can bend the throttle blade.</P>