09-30-2013, 11:16 AM
I put on the Staintune and was very happy with the sound. Have had 2 PCV's before on other bikes and wanted to run on the CB and felt it probably would improve when using the Staintune. So I installed the PCV, unplugged the O2 and replaced with the supplied "optimizer", blocked the pair hose, and ran the stock muffler with the PCV and the supplied "stock" map. I thought it was improved over stock. Then I installed the Staintune again and started looking for a custom map source.
Talked to Power Commander and visited a fairly nearby Dyno Tune source with some questions. Asked about the Air/Fuel ratio hose not being able to get past he cat. Dynojet suggested I run the Autotune module. I had the autotune on another bike and it worked well. Only thing, the O2 bung on the stock headers is 12mm thread and you need 18mm for the wide band O2 that works with the Autotune. To me, too much trouble to try to get some guy to install a 18mm bung in the stock header and expecting it to fit in the small space where the stock O2 is now. The DJ guy said they sell their kit to the dealers called the Stealth Extractor which they drill a hole ahead of the cat, install a rivnut and close off after the tune with a screw, to get to the exhaust on the upstream side of the cat. Sounds plausible.
Now I ask the tuning guy what about the cat? He says they do all kinds of bikes all the time and just shove the tube in and don't worry about it because the cat doesn't change the afr reading that much. I don't see how that's true because cars have a O2 sensor on both sides of the cat. So I don't want to pay for a Dynotune if I don't think its accurate because they sniff the exhaust downstream from the cat in the stock header. When I mention the stealth extractor, they don't know what im talking about. He says they can just dyno the bike then and see if there are any map areas that are way off for the afr and just change map area values by hand if the stock map needs it..... not a real dynotune or custom map.
So here I am. Can't go to Vegas for the hq guys to do it and I don't really trust the local dynotune shop to do a proper job. Might just have them dyno to see if anything is way off, make small adjustments, and run it as is until Power Commander comes up someday with the appropriate map for my setup.... or any setup other than the stock one.
Talked to Power Commander and visited a fairly nearby Dyno Tune source with some questions. Asked about the Air/Fuel ratio hose not being able to get past he cat. Dynojet suggested I run the Autotune module. I had the autotune on another bike and it worked well. Only thing, the O2 bung on the stock headers is 12mm thread and you need 18mm for the wide band O2 that works with the Autotune. To me, too much trouble to try to get some guy to install a 18mm bung in the stock header and expecting it to fit in the small space where the stock O2 is now. The DJ guy said they sell their kit to the dealers called the Stealth Extractor which they drill a hole ahead of the cat, install a rivnut and close off after the tune with a screw, to get to the exhaust on the upstream side of the cat. Sounds plausible.
Now I ask the tuning guy what about the cat? He says they do all kinds of bikes all the time and just shove the tube in and don't worry about it because the cat doesn't change the afr reading that much. I don't see how that's true because cars have a O2 sensor on both sides of the cat. So I don't want to pay for a Dynotune if I don't think its accurate because they sniff the exhaust downstream from the cat in the stock header. When I mention the stealth extractor, they don't know what im talking about. He says they can just dyno the bike then and see if there are any map areas that are way off for the afr and just change map area values by hand if the stock map needs it..... not a real dynotune or custom map.
So here I am. Can't go to Vegas for the hq guys to do it and I don't really trust the local dynotune shop to do a proper job. Might just have them dyno to see if anything is way off, make small adjustments, and run it as is until Power Commander comes up someday with the appropriate map for my setup.... or any setup other than the stock one.