Hi all,

I recently installed a Cobra El Diablo 2 into 1 exhaust on my 2022 Street Bob. Found out after installing that it’s not the best pipe for performance/tuning, but here in Europe it’s already an 1100,- dollar pipe. Bassani will go for 1700,-. I also have a hi flow drop in filter and planning on a stage one only.
The El Diablo has 12mm o2 bungs only, so I’m wondering what the best option for tuning is. I don’t need to max out every hp, but I do want a smooth and correct running motorcycle. I was looking at the dynojet PV3, that will give me a standard map, with a possibility to do some basic auto tuning with the 12mm’s. Or go for the power vision and drill the 12mm to 18mm? This will cost a few hundred dollars, is this worth it or is a stock tune good enough?
thanks!

 

I have 4 bikes... one with a Stage I (high flow air cleaner & exhaust), one a Stage II ( high flow a/c & exhaust w/bolt-in cams), one a Stage IV (big bore kit w.headwork), and one with a 124" high performance crate engine... They are all tuned with a powerVision tuner, of which I am a big fan...

Having said that...... IMHO, if you are certain you will only be doing a Stage I, no upgrades in the future, I believe the PV3 will work just fine for a street driven bike with your performance goals.... I wouldn't leave it with the OEM tune, because although it will self adjust in the closed loop portions of the tune map, the open loop portions of the tune map it will be a little lean. SInce the open loop portions are in the high load, high rpm areas of the tune, I prefer to re-tune all my Stage I bikes...

Enjoy....!

 

Thanks for the well explaining reply! And nice line-up of bikes.

For the re-tune, do you know if that re-tune is good to go with just the OEM bungs? Or do you need the wide band o2 sensors? What I’ve read the wide band sensors are obviously better, but I don’t know if it’s gonna give me a lot more for just a Stage 1..

 

The retune, if you use a canned map, is flashed to the ECM by the tuner... The O2 sensors have no part in actually flashing the ECM with the new map. The O2 sensors come into play if you decide to run an Auto Tune session on your new map and of course in your daily driving in the closed loop portions of your flashed tune...

My understanding is that the PV3 doesn't allow for auto tuning... However it does allow for data logging. That is an important option..

I bought my PowerVision tuner from FuelMoto. As such, I now have lifetime map support from FuelMoto AND Dynojet. If you should download a canned map, and you feel it is deficient in some area, let's say your bike has some spark knock. You can do a data log on a ride, make sure you cover the the type of riding that causes the spark knock, and then contact to FuelMoto or Dynojet with an explanation of your problem. They will most likely have you send the data log, they will inspect it, and make changes they feel necessary to solve your problem. They will send you back the adjusted tune, that you will then flash to your ECM.

This process doesn't invole any auto tuning, and uses your OEM O2 sensors....

The basic auto tune allows for some tweaking without contacting either vendor, and uses your OEM narrow band O2 sensors. I does a fair job.

To do any auto tuning with wide band O2 sensors, requires the Target Tune module, or the Auto Tune Pro module to use wide band O2 sensors for tuning... It's obvioulsy better, but I wouldn't waste the money on either for a street driven Stage I bike...

FWIW....
I have tuned several bikes (mine and a couple friend's bikes) with canned maps from FuelMoto. The standard for an auto tune session is that you are done, when the average cell changes reach 4% or less. On a Stage I map, I have yet to have just one 20 min auto tune session have more than a 6% average change. That tells me that FuelMoto's maps are pretty good.

On one occasion, I did an Auto Tune Pro (uses wide band O2 sensors and I have the module) on a bolt-in cams tune map. After one 20 minute Auto Tune Pro Session, the average change was 1%... that's damn good right out of the box with wide band O2 sensors...

I had a big bore kit on an early twin cam running the HD Stage III download. It ran well, but I was wondering what I was leaving behind, if anything. FuelMoto didn't have a map for. that year/displacement/combo. I contacted Dynojet, sent them a data log, and they returned it with some changes... the bike ran much better... actually a whole lot better...

IMHO...
Based on my anecdotal experience, for a street driven bike with Stage I or mild Stage 2 mods, a canned map from Fuelmoto (or DynoJet) will be a good tune in most cases.... Should you encounter a problem with a canned map, they both give excellent tune support...

Good luck with your decision...

 

have you confirmed your O2 sensor bung size ???

most have the 18mm and offer a 12mm reducer...just need to confirm that

 

Im enjoying the PV3 but I like to tinker. The Fuel Moto map ran good. After a few auto tune sessions it seemed to run better. That raised the VE tables on the rear and lowered the front. Probably due to injector tolerances. That made me feel like I did a good thing.

I took my auto tune and smoothed the VE tables. I made some changes in the decel area to get rid of the pop. Dynojet published some guidelines for adjusting AFR, VE and timing in the decel area. It worked.

After watching Kevin Baxter's spark plug video, on YouTube, it looks like I need more fuel at high load/ WOT. I just added some to the current map (that runs good) and will try again.

I hear Fuel Moto is a tremendous help with this but it keeps me occupied. I do prefer the PV3 and tuning software to the Vance and Hines FP3. I completely understand why many dyno tuners won't work with one.

 

Power Vision 3... You just can't go wrong with this tuner for a Stage 1 configuration.

The PV3 that I just bought and installed DOES allow for autotune.

 

Thanks, I was unaware of that.... Probably didn't read far enough in the description....

 

Thanks for all the replies! Highly appreciated. I just found out on the FuelMoto website that the PV3 is now able to autotune with the stock o2 sensors. New feature how I read it.
Also talked to my dealer, they don’t care about a PV3 being installed, they also use the power vision.

One thing that’s still open though; I’m in Europe and have 2 extra o2 sensors in the muffler to check if the CAT is working. They can be switched off (they don’t do anything for the engine), does anyone know if that’s possible with the PV3?
thanks!

 

There are a ton of settings within the PV tuning software.
I just started to dig into it last night.

At first glance, it looks a bit like this: