I've seen a lot of questions about how to properly set-up the Turbosmart Dual Port Blow Off Valve so I thought I would post how I did it. It will take a few trips down the street but I feel that my method to be pretty effective.
I started out with the hardness right in the middle. To set this, you tighten the knob all the way to full hard then loosen it three full turns. With this setting, go for a test drive and listen to the valve’s operation. You should be getting a nice even release of air with a 2nd gear WOT pull (pick a good road for this and watch the speed limit). If you are getting a fluttered release, loosen the valve in quarter turn increments until you hear the right valve release. When you are satisfied, take it out on the highway and go through the gears and listen to the valve (again watch your speed). This is a good time to take note of your max boost pressure if you have a gauge. If everything is set right, all gears should have a nice even release and your max boost pressure should be normal and holding. At this point, you can make minor adjustments to dial it in right where you want it.
Note 1: You only have six full turns of the knob from extreme tight until you see the red indicator mark for max softness.
Note 2: You should get some valve flutter with partial throttle releases.
Note 3: After I installed my Turbo Inlet I had to loosen my valve setting at least two full turns for proper operation.
Hope this helps people out.
I started out with the hardness right in the middle. To set this, you tighten the knob all the way to full hard then loosen it three full turns. With this setting, go for a test drive and listen to the valve’s operation. You should be getting a nice even release of air with a 2nd gear WOT pull (pick a good road for this and watch the speed limit). If you are getting a fluttered release, loosen the valve in quarter turn increments until you hear the right valve release. When you are satisfied, take it out on the highway and go through the gears and listen to the valve (again watch your speed). This is a good time to take note of your max boost pressure if you have a gauge. If everything is set right, all gears should have a nice even release and your max boost pressure should be normal and holding. At this point, you can make minor adjustments to dial it in right where you want it.
Note 1: You only have six full turns of the knob from extreme tight until you see the red indicator mark for max softness.
Note 2: You should get some valve flutter with partial throttle releases.
Note 3: After I installed my Turbo Inlet I had to loosen my valve setting at least two full turns for proper operation.
Hope this helps people out.
Last edited: