Christian Dionne
Member
Somebody emailed me about it so I thought I could share something that's worth a few tenths to some of us.
It's a check valve alot of the TurboBuick and Supra guys have been using. I use it for spoolup control only, some guys use it for actual boost control. Meaning : I never set the spring pressure more than my desired boost. I got it from Grainger, I believe it's made by McMaster Carr. I can't recall the PN, but I'll find out later. It's 1/8" NPT male on one end, you'll need a female to barb adaptor, and the other end has a hole. There's a little fitting at the Home Depot, that's like $0.49 for two, it'll slide down into the hole, and allow you to attach the hose to. Anyhow the check ball inside can be on either side, so you can use it for vacuum relief or pressure. It's rated at 0-20 psi with the ball on one side. So you tighten the body into itself, and the spring pressure goes up, all the way to 20psi. I run mine damn near full tight(15-18psi), and it keeps air from going towards the wastegate until your desired spring pressure is reached. I have a bleeder hole, 0.022" T-eed off after the valve towards the wastegate. It allows the pressure to escape from the wastegate canister after a boost situation has occurred. This way the next time you whack it, the wastegate will be closed again. The other side of the valve, closer to the ball inside, I have connected to the front vacuum connection on the lower intake manifold. I was having problems at first with the spring getting lodged sideways in the body of the check valve, so I put it on a vacuum/pressure source. This way the ball will seat correctly, everytime you get out of boost. The fitting on the compressor scroll will need to be blocked off of course.
I know the PN is in the Grainger catalog under Air Tool Suplies. It's something like VR22 or something rather.
You can probably use the computer controlled wastegate solenoid with this, just I haven't tried it out.
I'm sure there are other ways to use this valve to control boost. I just use it for that extra amount of boost at the tree, when I don't like loading up against the brakes and convertor too much (creates alot more heat). Some people think my 15+ psi launches are too much, but remember I'm not revving near as high as some. This, I think, gets the turbo up and spinning without creating too much power and wheelspin.
HTH, Christian
It's a check valve alot of the TurboBuick and Supra guys have been using. I use it for spoolup control only, some guys use it for actual boost control. Meaning : I never set the spring pressure more than my desired boost. I got it from Grainger, I believe it's made by McMaster Carr. I can't recall the PN, but I'll find out later. It's 1/8" NPT male on one end, you'll need a female to barb adaptor, and the other end has a hole. There's a little fitting at the Home Depot, that's like $0.49 for two, it'll slide down into the hole, and allow you to attach the hose to. Anyhow the check ball inside can be on either side, so you can use it for vacuum relief or pressure. It's rated at 0-20 psi with the ball on one side. So you tighten the body into itself, and the spring pressure goes up, all the way to 20psi. I run mine damn near full tight(15-18psi), and it keeps air from going towards the wastegate until your desired spring pressure is reached. I have a bleeder hole, 0.022" T-eed off after the valve towards the wastegate. It allows the pressure to escape from the wastegate canister after a boost situation has occurred. This way the next time you whack it, the wastegate will be closed again. The other side of the valve, closer to the ball inside, I have connected to the front vacuum connection on the lower intake manifold. I was having problems at first with the spring getting lodged sideways in the body of the check valve, so I put it on a vacuum/pressure source. This way the ball will seat correctly, everytime you get out of boost. The fitting on the compressor scroll will need to be blocked off of course.
I know the PN is in the Grainger catalog under Air Tool Suplies. It's something like VR22 or something rather.
You can probably use the computer controlled wastegate solenoid with this, just I haven't tried it out.
I'm sure there are other ways to use this valve to control boost. I just use it for that extra amount of boost at the tree, when I don't like loading up against the brakes and convertor too much (creates alot more heat). Some people think my 15+ psi launches are too much, but remember I'm not revving near as high as some. This, I think, gets the turbo up and spinning without creating too much power and wheelspin.
HTH, Christian
