Quote:
Originally Posted by BertoFT
I think someone on here is looking into a homebrew replacement for the bypass valve. I also remember reading a post that mentioned Edelbrock might be developing a better bypass valve. So there is still hope.
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That's me. I put together a linear actuator, a standard MAP sensor (didn't want to tap into the real one and risk voltage spikes on the CANBUS line) in a small aluminum box and an arduino. Whole thing is mounted on a rail under the trim above the driver's knee. I have everything working and dialed in, just haven't actually connected the cable to the actuator arm yet because I've been busy. I think this will be an ideal solution. I also have set up a 3 position switch as an input to the arduino - in one position (valet mode) the actuator never moves and you get no boost. In economy position the actuator doesn't move until you get to 7 inches of vacuum and is fully open at 2 inches. In standard mode it gives you the nominal performance, beginning to open at 10 inches of vacuum and fully open by 5.
BUT, I moved the vacuum connector for the standard actuator from the back of the supercharger about seven months ago. It is now teed into the second nipple on the nose of the supercharger that is shared with the brake booster. I'm suspicious that sourcing the air from the back of the supercharger (which also feeds it positive pressure when under heavier throttle) is what is causing these to fail. You get a slightly softer ramp up when applying the throttle smoothly so it makes daily driving better. When you hit the gas hard you get the same level of performance.