Hi all,

I ride a 2009 FLHT Electra Glide Standard, Stage 1, fitted with a Cobra Fi2000r , basic fuel module, (not the Power Pro auto tuner) .    I have no complaints with this fuel module.  No doubt I could get better performance with a more advanced tuner , but that is another topic.    I'm after advice and comments  regarding what would be the best option to accurately check the Air Fuel Ratio the bike is running with the fuel module I have installed, or for that matter, any similar fuel adding modules out there.

After some research I came up with these,

1 . Buy a stand alone AFR gauge, take it on and off bike when requried , say every oil change.  I did read that you have to change to Wideband sensors. .

2. Upgrade to a more advanced tuner, say a Dynojet Power Vision , or similar, which I belive can monitor the AFR.

3. As I am happy with the Cobra module ,  to put my mind at ease and confirm that the bike is not running to lean or rich, (and get real figures), take the bike to a dyno, (which is 300kms away). Probably about 1hour dyno time.

What do you guys recommend ??

Thanks Regards Mark

Get one of the more advance tuners

or travel spend money and get a on a dyno and find out that ya tune ain,t that good and end up getting a better tuner and a dyno tune done again

The "Dyno" will save you time but cost you dollars, it may take more than one (1) hour on the dyno, who knows?

Once the dyno time is used thats it, if for what ever reason you make changes to engine configuration then what do you do to optimise your engines performance? you will most probably have to return to the dyno.

If the dyno time is going to cost about the $400 -$500 mark you would IMHO, be better served to acquire and install an engine management system that allows for future proofing the possibility of engine configuration changes.

Depending on your perspective, an engine management system that you can tinker with can be either a burden or a joy, but if all you are chasing is the TRUE AFR then maybe the Dyno is your best option.

Cheers, Paul

Thanks for your replies guys,

As I belive that the AFR is "one" of the main statistics that is important to get right when dealing a EFI late model harley, specially  with the EPA requirerments .  More so when you do a Stage 1 or up.  I know there are other important statistics that need to be adjusted for Stage 2 and up, to get the best performance from your upgrades.  But if you have a Stage 1 only , and that is going to be it,  and you are a lttle isolated , and want to have the bike performing as it should, without getting every last piece of HP out of it , it seens I'm looking at a more advanced tuner , with all the bells and whisles, ( I think I'll only use a couple of them)  ie AFR adjust.

I did mention the Power Vision, there is another one I looked at , the Dynojet Gen 4 , it has a Gauge that can be taken on and off the bike showing AFR etc.  These two seem easy to install and would suite someone like myself that wants to keep it simple, but have the ability to see in real time and change  minor settings in a fairly easy manner.  Have others used these are similar tuners that are more DIY for basic setting adjustments and what are your thoughts ????  Regards Mark

Sure thing, the simpler the better, unfortunately I cannot offer any comment on the systems you have mentioned as I am not familiar with these ones.

I like to stick with the proven performers that I have invested time and effort with, so to change to another brand is not an option for me, also it is best to go with the one that will give you the best support.

Good luck with your final decision.

Paul

Mark, to do what you want on the Dyno will take less than 1/2hr and should cost $50-100.
This will give you an AFR/HP/TQ chart on what you have now.
It's probably the best thing to do if your worried, but a 600km round trip is an effort, especially if you have to do it again if things need changing.
If you need to take the next step, it will cost you a lot more money for hardware and tuning.
Your call !

ps. I use an Innovate LM2 wideband O2 meter for on the bike logging .

Hi Speedzter,

You said you use the Innovate LM2 O2 meter  using Wideband Sensor.   I researched and now understand the difference between Narrow and Wideband Sensors.   All of the AFR gauges I have seen use a Wideband Sensor because they have a wider band to measure or change settings , ie , more accurate.     

As my bike is a 2009 FLHT with factory Narrow band Sensors installed, I am a little confused as to how Wideband sensors or sensor will effect my bike.

1. As I have said , most of the AFR gauges only use '1' Wideband sensor to operate correctly.  What does the other sensor, ( Narrow band) do on the bike?  Will there be conflicting information going to the ECM ??

2. If I install a AFR gauge or similar device the needs a Wideband Sensor to operate correctly, with regard to my  bike, is it just a matter of welding the correct size bung to accomadate the Wideband Sensor ??

3. Is there any other adjusts to make on the bike if you install Wideband Sensors on a bike that has Narrow band Sensors as stock ???

Guys , I think you get the idea of what I'm trying to ask here.   If I keep going I'll only confuse myself more.   Any comments that will help me understand the pros and cons of installing Wideband sensors so I can install a AFR gauge all similar device.     Thanks Mark

My bike has a carby, so it's a bit different. You can use it stand alone by building a sniffer to fit in your pipe.

Take a look at these guys who do an AFR meter for FI bikes.

www.rbracing-rsr.com/rsrgauge.htm