Haha, what an interesting day.
 

So I had decided that while I am on vacation this week, I would get some electronics out of the way that I had been putting off. I made the e-fan circut, idle control circut with requisite beefier transistor, and put a boost control circtut in. Now you are probably wondering why I posted in the first place. Well, its simple really. I had a coincidental electrical problem in my harness that just happened to show up when the ms was reinstalled in the car. Took me all day to find it. Anyways I got some basic parameters burned to the chip for the boost contro feature (using a stock s5 bost control solenoid.)It worked great till I put kpa target table in place. I was heading on a long drive to re-tune the beast overall. I was looking at the ve table and at about half throttle going up hill in fifth gear I managed to hit about 23psi of boost with the stock turbo... This of course was above my map parameters and caused a fuel cut which proceded to grenade my motor to hell and back. Left just enough compression in about 2 combustion chambers to limp home. Trust me, its slower than a geo metro right now, but 23 psi, holy shit that felt interesting.
Anywyas, I have been laughing to myself about it since. Gives me a good reason to start my engine build I have been planning. Amazing though, I can still start and drive it. It just runs like its got less than half a motor. Still makes a few psi of boost too lol.
Oh and for the record, I had a chipped apex seal in one of the rotors anyways, so I didn't plan on it lasting... It was just a used japanese S5 motor anyways.
Anyways, my first grenaded motor experience. I didn't even freak out, I just looked at the tach, calmly said, "well........fuck" and turned around and headed home.

The boost control circut WORKS, you just gotta be carefull with it lol.


dpf22

:)

I am scared to build one because I have broke to many engine tuning boost. And I would be even easier if I could control it from my computer instead of manual boost controller. I have all the parts to build it .