My PC5 came today so I am ready to rock! I would like to change things one at a time, starting with stock air and exhaust, but with PC5 added. Then add my Wings muffler, changing the map accordingly. Then, with a opened-up air box, and appropriate map. My question is, what map to use with the stock air and exhaust. I understand that the PC 5 comes with a map for stock air and exhaust already loaded, so I theoretically don't have to change anything for step 1. However, I noticed that while the stock air and exhaust map (M18-016-001.pvm) adds fuel in a a lot of places, it also leans it in others. Since the idea is to lessen the overly-lean factory settings, leaning it still further seems to be doing the opposite. Should I change the negative values to zero, or are they there for a good reason?
Also, there are no ignition changes in the stock air and exhaust map. Is it OK to advance the timing 2-3 degrees, or should I wait until I add the Wings exhaust?
And thanks for bringing up the subject of spark advance and octane relationship. I researched it and learned a lot!
Hey Maribo,
Yeah, that should be easy to do.
For stock intake/exhaust: For the most part, since the PC's are "piggy back" systems, you should be able to hook it all up and just zero out all the tables in on a base map. And if you leave the O2 hooked up, it's likely that the bike won't be any different than OEM. In essence, you're not changing anything from oem. (just make sure to terminate the O2 with the provided resistor plug if you alter tables, or it will fight the PC with FI duty cycle changes)
Based on how it looks, it's likely that dynojet's "stock map" is just a very small tune (like "chipping" a stock car). A little timing and fuel really does help. It's hard to say why they removed fuel in area. The Duke's do have different air boxes and exhaust systems, so maybe DJ noticed something on the dyno that day (off throttle condition, maybe?). Most companies test a few of the same machines and average out a conservative tune for of-the-shelf. As I think GSP mentioned, any experience with these bikes would probably make me want to take the negative values out of the "stock" PC map and see how she feels.
Adding timing will likely increase EGT's, so I'm not sure I'd go there with that huge heat box of an OEM cat/muffler. Who knows, maybe I'm being too conservative... There may be folks here with more 690/thumper experience that can chime in. You could always bump it 1-2º, and check with an infrared temp gauge to see how much it increases. Or if it pings, you'll also know.
For the other mods, you may want to check out the auto tune. It won't get you the most HP, but that wideband O2 should certainly help the PC keep A/F in check. I think GSP's map is a great place to start. I made a few guesses and tweaks to it, but for the most part, the bike ran awesome during a 80-100mi ride last weekend. (btw, I only lost about 1-2mpg)
Personally, I'm excited to see what the 14's do on the Dyno. And in my experience being around tuners for a number of years, there is no magic map to download. There are way too many variables (temp, humidity, elevation, etc), and I've seen the same machine with basically the same mods react differently to tunes. You just can't beat the dyno to find where the limits are.
Hope that helps.