AF XIED vs. Booster Plug for 2006 R850R

[DanH]

This is the small bore version of the R1150R so I'm posting this here as your experiences with these devices on the R1150R is directly applicable.

As I understand it, the Booster Plug tricks the too lean setting of the fuel injection by convincing it that the air temperature is 20 degrees C lower than it actually is. The AF XIED fools the fuel injection by tricking the O2 sensor.

Both seem to have their satisfied customers, the Booster plug is some $70 less than the AF XIED. Not being a rich guy, if I can save $70 and get the same result I'm inclined to do so.

What's the verdict?

[EasyBee]

And I always thought that the R850 doesn't have the same problem as the R1150, the KFR problem, because the engine runs too lean.
But if you need it,
How much does the Booster Plug go for? Something around $ 150 ?
Why don't you go for the Recyclizer? Does exactly the same thing as the Booster Plug.
€ 34,30 = with shipping around $ 50 .
http://www.novitech.nl/homeeng.html

No connections with this company, just a happy customer.

[Roger 04 rt]

This is the small bore version of the R1150R so I'm posting this here as your experiences with these devices on the R1150R is directly applicable.

As I understand it, the Booster Plug tricks the too lean setting of the fuel injection by convincing it that the air temperature is 20 degrees C lower than it actually is. The AF XIED fools the fuel injection by tricking the O2 sensor.

Both seem to have their satisfied customers, the Booster plug is some $70 less than the AF XIED. Not being a rich guy, if I can save $70 and get the same result I'm inclined to do so.

What's the verdict?

The effect of the BoosterPlug is learned and negated by the O2 sensor and Motronic.

The AF-XIED sets a new richer fueling target for the Motronic and thus isn't cancelled out.

Think of it this way: the O2 sensor is like a thermostat for how much oxygen remains in the exhaust. As Lon as it is set to 14.7:1, that is what you get no matter what else you do. Using the AFXIED, you literally set the oxygen thermostat to a new, richer, oxygen level.

I owned a BP before buying an LC-1 (like an AFXIED). The owner of BoosterPlug put an LC-1 on his bike with my help. Read about it here:

[Roger 04 rt]

Link here: http://guzzitech.dk/category/bmwf800s/page/2/

[DanH]

Whoa boy, I wouldn't have a clue how to do all that.

I guess it will have to be the AF XIED. Note that although I don't have the surging problem, it is clear the bike is running very lean and I believe it affects mid range torque and HP where I need better performance for our type of riding here. So I am hoping that my $220 will do just that, along with removing the cat converter.

If I understand it correctly, then, the Boosterplug isn't going to work on the later ECUs like the Motronic that are adaptive. However, tweaking the O2 sensor changes the output of the Motronic both open and closed loops and it doesn't adapt to it.

Makes sense given how little I understand these complicated electronics we are all stuck with these days.

[Roger 04 rt]

It is hard to understand the full operation of a closed loop fueling system. The manufacturers should do a better job explaining how these bikes work.

My suggestion, since input and exhaust are a tuned system matched to the internal fuel tables of the Motronic, is to install the AFXIED, ride for a few weeks and then if you still want remove the cat. That way you will know what the AFXIED does and then what the cat removal does.

[DanH]

That's a good idea though I'm certain I want to remove the cat converter to get better flow through the engine. Almost all my riding is at 5000 feet or higher. I'm going to put a K&N on the intake too. The motronic should inject more fuel if there is more air flow, correct? However, it will still stay at that very lean 14.7 ratio, that's why I need the AF XIED to correct that.

I view the two as complimentary, indeed the ability to correct the fuel ratio to a slightly richer setting should really maximize the benefit of reducing the back pressure and making the engine more free flowing. I'm not putting an after market exhaust on at that point, my budget will be shot from new Ohlins, the AF XIED, the Y pipe and a new windshield (mine is a bit of a mess).

The two together should really increase the performance of this bike. That's what I'm shooting for. Every post I've read on this topic seems to indicate significant improvement in smoothness and mid range power with exhaust improvements and a richer fuel mixture.

The beauty of the AF XIED approach is that the geometry of how the Motronic approaches altitude, temperature, alcohol in the fuel, etc., doesn't get changed. You just fool the thing into base lining on a richer mixture which you can vary to get the best overall performance without screwing up fuel economy. John is trying to remap the geometry of the Motronic and he may get there at some point.

However, if I understand the discussion, there's nothing wrong with how the chip manages things, it is just standardized at a too lean fuel ratio because of emissions and the necessity of meeting those government regulations as if motorcycles amount to a hill of beans when it comes to air pollution.

Sound right?

[Soliton]

I ride a single spark R1150r.

It has

• An AF-Xied
  Lennies Rocket Sprockets
  No catalytic converter
  An open shorty muffler

Sounds like what you are planning.

My experience. It pulls like a train. I can cruise at 80km/h in top at 2500rpm easily. Roll on the throttle and it just ups and goes. I wasn't paying attention when I pulled up to a set of lights the other day. When I took off it was sluggish. I slipped the throttle a tiny bit and kept going. I was in fourth.

My friend has an R1200. He took my bike for a ride and reckons it all over his.

I ride between 60km/h and 140km/h for 99.5% of the time the Af-Xied and Rocket Sprocket is absolutely brilliant. I thought I would sacrifice fuel economy but that hasn't happened. It never surges and I've never regretted it. The torque and go are exactly where I want and use them.

My two cents worth.

[DanH]

I had to look up the rocket sprocket business. You're the first one to bring that up. Excellent idea but I don't think I want to get into engine modifications at that level at this point. I'd be interested in your experience with fitting it, however.

Thanks for the feedback on the AF XIED. I am going to use the stock muffler, however. Just don't have the $600 to replace it right now. Everyone tells me that most of the backpressure comes from the cat converter anyway.

[Roger 04 rt]

That's a good idea though I'm certain I want to remove the cat converter to get better flow through the engine. Almost all my riding is at 5000 feet or higher. I'm going to put a K&N on the intake too. The motronic should inject more fuel if there is more air flow, correct? However, it will still stay at that very lean 14.7 ratio, that's why I need the AF XIED to correct that.

I view the two as complimentary, indeed the ability to correct the fuel ratio to a slightly richer setting should really maximize the benefit of reducing the back pressure and making the engine more free flowing. I'm not putting an after market exhaust on at that point, my budget will be shot from new Ohlins, the AF XIED, the Y pipe and a new windshield (mine is a bit of a mess).

The two together should really increase the performance of this bike. That's what I'm shooting for. Every post I've read on this topic seems to indicate significant improvement in smoothness and mid range power with exhaust improvements and a richer fuel mixture.

The beauty of the AF XIED approach is that the geometry of how the Motronic approaches altitude, temperature, alcohol in the fuel, etc., doesn't get changed. You just fool the thing into base lining on a richer mixture which you can vary to get the best overall performance without screwing up fuel economy. John is trying to remap the geometry of the Motronic and he may get there at some point.

However, if I understand the discussion, there's nothing wrong with how the chip manages things, it is just standardized at a too lean fuel ratio because of emissions and the necessity of meeting those government regulations as if motorcycles amount to a hill of beans when it comes to air pollution.

Sound right?

You have a good understanding of things. You may get a little more air through the bike at higher RPMs by eliminating the Cat. I'll be interested in what you find.

John will never be able to have Closed Loop and Closed Loop fuel enhancement through Chip remapping though. I've tried hard to help him see that but I don't think he has a grasp of how Adaptation works and that seems to be holding him back

[DanH]

Thanks Roger for all your feedback and education for the Motronic challenged (me). It will be a couple months before I get all this stuff and get it on the bike but I will post feedback on the results.

Dan