After a near miss with death while working on installing and testing his vexus setup Jstadwater is back with a vengeance and reports the successful installation of the vexus circuit in his Tranzam fuel injected v8 engine.
I just completed the VexUs install in the Suburban, started it up and it purred like a kitten! I have a couple tests to perform before I take her out on the road. I started it up without the plasma circuit on, and monitored the readouts on my laptop through the OBD2 connection. Specifically the o2 sensors and the fuel trim readouts, fuel trim was 0% as normal and o2 sensors were reading normally. I flipped on the VexUs circuit and the fuel trim readouts started fluctuating like crazy, as did the o2 sensor signals, I guess the ECM was trying to figure out what the heck was going on! (Good luck with that, mr. ECM ) This was at factory settings, I have not changed the program yet to lean out the fuel mixture or retard the timing, that’ll be tomorrow! When the plasma circuit comes on, the idle does go up and immediately the ECM takes over the idle speed to keep it “acceptable” according to it’s program parameters. (I can re-program that also) I measured the amp draw from the battery to the inverter, at idle it was 2 amps. I quickly opened the throttle, (no stumble or miss, very quick response and smooth as can be) and held it for a few seconds probably around 3,000 rpm from the sound, the amp draw never went past 3.5 amps. Keep in mind, this is a 5.7 liter V-8, instead of a 4-cylinder, pretty low amps there. I also measured the feed line to the kick wires, the draw is still only between .10 and .12 amps.
I am using quad shield satellite cable (18 gauge inner wire, shielded to 2,300mhz) from the voltage tripler inside the cab out to the standard 2-way and 4-way cable TV splitters under the hood. 2.5uF at 450VDC powered by a 1000 watt inverter and isolation transformer. Inverter is happy as a Lark, so far so good! I will post pics tomorrow, my wife has the camera today. I can’t wait to see how this 350 Chevy is going to perform on the road with this circuit! Stay tuned, it can only get better from here on out……………………………………….. Mike
Tags: Circuits, Engine by Sparky
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