BOV question

[BrianD7318]

I'm new to the Turbo motor game and I have a few questions about running a BOV on my car. I am running a Turbo setup built by Mpgmike on my 73 Dodge 225 slant 6, auto. System is a blowthru 2 bbl carb running at 10-11 lbs boost. I need to add a BOV because I am getting a slight amount of compressor surge only after mashing the pedal and quickly letting off. Under normal driving conditions and boost it is not an issue. What should my BOV be set at? Car my see 14lbs boost max. Also I don"t have a lot of room between the turbo and the bonnet so the BOV has to be as small as possible. Any or all input or ideas will be helpful. Thanks, Brian

[crazymadbastard]

Thats a nice project.

What does Mike suggest?

[detobias]

BOV can be remotely mounted, all you really need is a "T" / nipple somewhere between your turbo & bonnet ; the late-TI 2.2 turbo engines have the BOV mounted *inside* the air filter box and connected to the pressurized inlet pipe with a section of 3/4" rubber hose

actually for your low boost application a stock late-TI MoPar BOV would prolly work ; most of us ditch them cuz they leak boost much past 12-14 psi

PS I got one for you if you need

[BrianD7318]

I thought about the Tee fitting, but there is not enough room to add it. I will have to drill the pipe and weld in a pipe nipple or a flange depending on the valve. I need some suggestions on a valve operating range. I just don't want to risk breaking the turbo running without one. What do you guys think?

[tkelly27]

T2 cars did not come with a BOV. You're not going to break it not running one. You should though, they sound cool and if you're planning on keeping the car for a while you'll see long run benefits.

At those boost levels ANY stock BOV from any turbo car will work. It's not a setting that gets a valve to pop off, it's a series of conditions. The vacuum has to be enough to draw the valve up, and the boost has to be high enough to push the valve open. People ditch stock valves because they leak, none that I've ever heard of leak @ 14psi though. (Most) stock valves are non adjustable. All TD valves are non adjustable. They should also flow plenty to keep you out of surge.

The other nice thing about a stock plastic BOV is the mounting. They go on with hose clamps instead of flanges. Less welding, less BS to deal with.

I've also seen hundreds in junkyard over my days.