ON TURBO BOV (Blow off Valve)

[FastEnough]

Well after using a BOV (Blow off Valve) on my turbo for 2 weeks I am finally going to share my information. I bought 4 of them to try they were only $5. 00 apiece and made very well. Here they are from www.McMaster-Carr.com

ITEM #4772K2 1/8" NPT

$4. 89

Economy Brass Pop-Safety Valves for Air

• Set Pressure: See "To Order"

• Maximum Temperature: 250° F

Low-cost protection for compressed air systems. Valves are made of brass with a stainless steel ball. Ball is seated on a precision-machined brass seat. Seat is metal-to-metal.

Connections: NPT male bottom inlet and vented side outlet.

To Order: Valves are available at set pressures from 5 to 100 psi in 5 psi increments. Please specify pressure setting.

Our turbo has a 1/8" NPT where are boost elbow goes. I just screwed it in and put a rubber plug over my wastegate line. I ordered a 30,35,40,45. I think the one for me that worked best is the 35. And it does keep me from barking the turbo. I have an auto so it is harder anyway but when I am on 6/6 it is not hard to do if I get on it hard and let off quickly. Hope this helps some of you that are frustrated with there wastegate like I was. And you can here it pop off at 35psi.

 

[Tomeygun]

HMMM...



would this work in the intake horn to reduce extreme pressures and broken input shafts?

 

[CLAYTON]

Does it sound cool

 

[FastEnough]

Yes, you can here it. You can here it slightly from the cab but I would assume it is louder from the outside. I guess that is cool...

 

[dieselpilot1969]

doyou have an install pic?

 

[jimnance]

Great idea, but a word of caution. Even though the valve screws onto the "cool" side of the turbo, the valve temperature might exceed the 250F rating. You've probably never seen a turbo while at serious work, but in certain twin aircraft you can see the turbo glowing bright cherry red at night.



If the valve does malfunction, there is no mechanism to prevent overboost. I'm sure some guys run with the wastegate closed all the time, but it can seriously affect durability in the long run. In the short run it's possible to melt a piston, smoke the turbo, or a number of not so good outcomes.



Let us know how the valve works out. If it proves reliable it would be a neat deal.

 

[FastEnough]

Originally posted by jimnance

Great idea, but a word of caution. Even though the valve screws onto the "cool" side of the turbo, the valve temperature might exceed the 250F rating. You've probably never seen a turbo while at serious work, but in certain twin aircraft you can see the turbo glowing bright cherry red at night.



If the valve does malfunction, there is no mechanism to prevent overboost. I'm sure some guys run with the wastegate closed all the time, but it can seriously affect durability in the long run. In the short run it's possible to melt a piston, smoke the turbo, or a number of not so good outcomes.



Let us know how the valve works out. If it proves reliable it would be a neat deal.

They do make a few different sizes. You could do as tommeygun suggested and tap and put it on the air-horn.

 

[FastEnough]

Originally posted by dieselpilot1969

doyou have an install pic?

I can take a pic. You just remove your elbow from your turbo to your wastegate and screw it in. I removed the hose off the gate control and put a plug over the end to protect it.

 

[BIG HAULERS]

Originally posted by FastEnough

I can take a pic. You just remove your elbow from your turbo to your wastegate and screw it in. I removed the hose off the gate control and put a plug over the end to protect it.

Yes please do Im interested also I couldnt get the link to open

 

[bpenrod]

That website never seems to open for me, I keep getting a tcp error!

 

[lil red cummins]

these over pressure valves are used in air compressor and air tank applications mostly. they are primarily for high pressure (150 psi and higher) with low volume bleed. i don't think they can pass a large enough volume of air to do any good in the intake. specially at 35 to 40 psi. they typically only have a 1/8" or 1/4" hole. the volume of air flow in the intake would probably require a 1" or larger hole for bleed off to do any good.



am i wrong?



jim