Black Arrow

Thanx andrew. I quess I`ll do some research and testing!

Ian Carr

why would it make a deference... its all pressurized air any ways it don't matter if its going left, right, up , or down...

evil 944t

Lart 951, still interested? my address is dmcgrath03@snet.net

lart951

email sent

RobNL

The main difference is safety in case you have a leak in the small vacuum lines.

When you install it the "right" way it opens when boost pressure is applied to the valve and the pressure on the vacuum line plus the springrate is not enough to keep the valve closed. In that case you need those the washers to increase the springrate.

When you have it mounted as lart951 says, the "wrong" way, the only way it opens is when a vacuum signal is applied to the vacuum line. In this case there is no need to add those washers.

If you want to use this valve also to make the engine breath more easier when the turbo needs to spool up, the best option is to install it the "wrong" way.

On the engine of DFASTEST951 they've installed it as lart951 would say the "wrong" way, but it appears that Powerhaus like it this way and finds it capable enough for that engine.

Ian Carr

Ahhhhhh i see, i didn't look close enough at the pictures. so if i was running the stock j-boot and stock hard pipes i would run it the "wrong way" and have the vacuum lines connected and Basically run the by-pass valve or would i run it the "right way" ... i'm not sure

RobNL

If you're using the stock pipes and mount the BOV with the vacuum line pointing the same way as the original, it would be the "wrong" way.

Ian Carr

If i ran it as a blow off valve could i run it the right way?

And obviously covered the j-boot connection

Darius Juca

seems that installing it the wrong way forms a better seal too........of course you'll need to tap a vacuum line straight from the intake manifold....but..if you bought one of those mad scientist..aka..Laudst.. vacuum manifold then you don't have to tap the manifold...I will be using 2 ports for my lindsey bov scince I seem to get stuck on the wrong wayalso when installed the wrong way keep in mind that the boost pressure is pushing the piston against one side causing friction so it's harder forteh vacuum toactuate it...unlike the stock wich you can literally suck open...2 port connected to a Y then one line will do fine....

lart951

On my pictures the one that is named wrong is from my car the one that is named right is from Lindsey racing website.

shmark

Wow this thread generated a few responses. Unfortunately I didn't get a chance to install the valve today, hopefully tomorrow. I was five minutes from being done at 2pm today and then dropped a washer behind the timing belt. It fell way down behind the pulleys and cost me an additional 2.5 hours. I'm really tired, but taking the car for a nice wheelspin-ful drive was the best therapy. It's great to be running again! I'll tackle the valve asap.

NZ951

Tip: get one of those extendable magnet thingys. Its saved me weeks of bolts and washer searching!

RobNL

Why not rotate it? If you're going to run it like a blow off valve, you get other issues/problems, such as running rich during shifts. There are enough posts on this.

When I look at my bypass valve, the chamber is bigger than the valve, so the air goes around the valve without pushing it to one side. But this is probably the modification LR made to it to increase flow.

shmark

That's what finally did the trick. Unfortunately the little bugger had fallen down to the bottom and hidden itself. I had to pull the lower covers, release the alternator belt, and then unbolt the lower cover before I finally got the !#@!#@@! thing out.

But she's running great now - wheelspin all the way to 3rd is really cool. Did I mention my wife was working with me the whole time? Couldn't have made it without her.

Darius Juca

When I look at my bypass valve, the chamber is bigger than the valve, so the air goes around the valve without pushing it to one side. But this is probably the modification LR made to it to increase flow.
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Rob N.

do you think it leaks boost? if you blow hard on either end the lindsey unit definitelly loses air..the stock doesnotdue to the rubber and plastic wich are better sealers than steel..but stock valves do break.