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Message: [QUOTE="Charles, post: 1419982, member: 103"] I cap the SOI because I don't like the idea of my truck rodding the block because a sensor came unplugged or crapped out. That and mechanical trucks making over 2000hp don't even have variable timing. So at the extreme, it's not even required to have timing ever change. Every 800+ hp 12v zipping down the road handing us our asses while towing just fine knows this. My plan is to make a little module that plugs inline with the 42 pin connector that makes live, real-time measurements for pulsewidth, timing, icp and IPR duty cycle and outputs them to an RCA connector that I will run into my head unit as a "backup camera" input so I can have it on my screen live. Basically an oscilloscope without all the bs. Then I can see what the timing [i]actually[/i] does on a cold start, and if and where it's [i]actually[/i] moving when I make tuning changes to timing. I have little doubt that something is off. I just don't have enough care for the smoke to break out the scope thus far. If it were built into the head-unit, I could see myself flipping over to that view very often. Who would like to see live... ACTUAL timing while they drove? Not some calculated bs value? I know I was pretty shocked the first time I drove around with a scope bouncing in the seat next to me reading timing! Holy hell did the maps have NOTHING to do with what was ACTUALLY happening!!! The cap however...... spot on. What you set that value to is exactly where it gets capped. If you want to [i]know[/i] what you timing is, just set the cap to what you want and ask for lebbentybillion degrees elsewhere... Then you'll know how your truck [i]actually[/i] drives with XX degrees of timing. If I had a dollar for every time someone told me they were running 9 degrees in a file that was more like 50+. I would wager that anyone who hasn't watched CPS and High Side bank 1 on a scope while driving probably only [i]thinks[/i] they know their timing. Unless someone [i]else[/i] already calibrated their template to a scope reading for them. [/QUOTE]