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Max, here is the APPS.
 

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Keith has better diagrams than I do. But heres one thats pretty clear.
 
Discussion starter · #265 ·
thanks for the quick responses!!!!
One question, I see that there are 2 "signal" wires, one is APPS No.1 and the other APPS No.2
What I am trying to do is install a nitrous "WOT swicth" that activates using a voltage signal from the TPS. So I guess I need the wire that supplies 5v at wide open throttle?Which one should I go with?
 
If i remember correctly pne is 0-5 and the pther is 5-0. Will need to measure which is which.
 

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Sweet.. you are really going to test that stock block... ;)
 
Discussion starter · #271 ·
Ok, so i completed the mod tonight, it is almost the same as the diagram i posted earlier, but instead of feeding a line in front of the turbo i routed it to a small aluminum can with a one way check valve (basically a vacuum reservoir) which stores vacuum which is used to open the blow off valve when i let off the throttle.
To control the air solenoid valve i used a Zex, TPS based, programmable nitrous switch. I programmed it to activate the solenoid at 3/4 throttle. So now the truck no longer goes into boost (maybe 1psi) unless i go past 3/4 throttle and when i let off the switch turns off the solenoid which allows the stored vacuum to open the blow off valve. I know you are probably reading this and saying: "wait, what? !!" But it is difficult to explain in a post. I will try to post some pics tomorrow for visual reference or maybe even a video explaining how the whole system works. It is actually a simple system.
I gotta tell you, i love it so far. Boost comes on demand. Driveability is back. Truck literally drives like stock untill you go past 3/4 throttle. No more auto boost, self acceleration!
 
Thats a great work around! Well done..
 
Discussion starter · #276 ·
You are correct" but i am not taking it to the track until i do something about the tranmission. I mean, the converter broke on a 1-2 shift on the street! Imagine what would happen to it, or the rest of the trasmission, on a sticky track :D
 
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