My15m is working well with my 04v11s now in open loop and just needs some adjusting at WOT or just below it.  Will installing an LC-1 o2 sensor help out that much in this region of the map as I've read many run open loop in that area of the map.
Appreciate your feedback.

Charles

One way to put it is: It's not needed, but it's a damn good waste of time and money!

Even if closed loop is too slow to to the perfect job, it will still help you dial in a better map manually. And I've actually found, after carefulling selecting breakpoints so WOT is spot-on a throttle breakpoint, that a series of WOT pulls in autotune will actually set most of the cells and it will be consistent.

I think WOT is the very least problematic area to tune. Just get it in the ballpark, too rich rather than too lean, and you're set. It's much harder to perfect the rest of the map, considering transitions, mileage and whatnot.

Raz,

Thanks for your words of wisdom,, I think I will for now keep my money and spend/waste/enjoy my time dialing in manually for at least a week or two before I consider closed loop.

Thanks again

Charles