Dyno results 2011 showroom stock

[RansomT]

I made it up to my BMW dealer today and finally got the 600m limiter removed. The first thing I did when I got back was throw it on the dyno to get some base numbers. I'll be posting some more info later, but I do need to say that I have no clue how the CATS will survive running that rich.

My dyno reported 181 wHP with ISO correction, 178.5 SAE, and 182.5 DIN.

The bike is a standard with shifter, 2011 with 900 miles. Shell 93 pump gas. 4 runs all within 2 wHP.

[H-2 CHARLIE]

Great show of power .. Im at 3,800 miles and stock

[JBuchanan]

Be interesting to see how the numbers change with mileage and break in. What "method" did you use break it in.....well actually never mind because I guess BMW forces a " proper" break in with the 9k rpm limiter.

My bike should be here in about 3-4 weeks and I plan to get the limiter moved ASAP via GS-911 and then ride it like I stole it and see how it does on the dyno.

[RansomT]

I probably need start a discussion about this ... But, I data logged one my pulls with the GS-911. It shows that the Lambda control factor is 1.0 on all 100% throttle. Which tells me, tentatively, that you can tune the 100% column on PCV and allow the ECU to tune all part throttle with no ill effects.

HOWEVER, the GS-911 only gave a few data points. I need to figure out if it will datalog more data quicker. I really can't make too much of it unless I get more data.

[yzfr1mike]

Your bike performed within 1 HP of mine on the first test (2010 model) I think that you have a good start here!

I would think that you will need to use a wide band O2 sensor to think about retuning the fuel mixture. The stock O2 sensors are designed to hold a 14.7 to 1 AFR at part throttle, but the computer reverts to a stored map for all WOT operation.

My stock bike was lean on the dyno at all light throttle openings (2%, 5%) with the stock exhaust. This was backed up with a slight surge on the road at these steady speeds. A PC5 and a good pipe will add several HP to the motor, as will a few more miles.

ENJOY!

[Nigel]

Originally Posted by RansomT

I probably need start a discussion about this ... But, I data logged one my pulls with the GS-911. It shows that the Lambda control factor is 1.0 on all 100% throttle. Which tells me, tentatively, that you can tune the 100% column on PCV and allow the ECU to tune all part throttle with no ill effects.

HOWEVER, the GS-911 only gave a few data points. I need to figure out if it will datalog more data quicker. I really can't make too much of it unless I get more data.

1 simply means that it is following the stock targets. With the HP calibation kit you can then go r.g. 0.85 or 1.15 etc. etc. One is this the factor used to indicate standard settings, much like 0 is on the Power Commander. Thus the 0.85 in the example above is a PC's -15% and the 1.15 would be +15% if you get what I am trying to say.

N.

[RansomT]

Originally Posted by Nigel

1 simply means that it is following the stock targets. With the HP calibation kit you can then go r.g. 0.85 or 1.15 etc. etc. One is this the factor used to indicate standard settings, much like 0 is on the Power Commander. Thus the 0.85 in the example above is a PC's -15% and the 1.15 would be +15% if you get what I am trying to say.

N.

Yes. All of my part throttle factors were ranging from 0.95 - 1.04. As soon as I went full throttle, factors went to 1.0. I am going to assume those are percentages. What makes this important is that in "the car world", even when you go full throttle, the ECU makes corrections to factory map. The cars will adjust full throttle (open loop) from readings it gets from closed loop operation. It makes those assumptions from either referencing the MAP sensor or MAF.

I also am going to assume now that the only reason the 02s are even there is to achieve /Stoichiometric. Which, if the assumption is true, then higher load levels (once open loop), adjustments made with a PCV will be un altered by the ECU.

[shaggy1970]

Originally Posted by RansomT

I probably need start a discussion about this ... But, I data logged one my pulls with the GS-911. It shows that the Lambda control factor is 1.0 on all 100% throttle. Which tells me, tentatively, that you can tune the 100% column on PCV and allow the ECU to tune all part throttle with no ill effects.

HOWEVER, the GS-911 only gave a few data points. I need to figure out if it will datalog more data quicker. I really can't make too much of it unless I get more data.

Unleash the ECU you should be able to get substantial gains.

[Nigel]

Originally Posted by RansomT

Yes. All of my part throttle factors were ranging from 0.95 - 1.04. As soon as I went full throttle, factors went to 1.0. I am going to assume those are percentages. What makes this important is that in "the car world", even when you go full throttle, the ECU makes corrections to factory map. The cars will adjust full throttle (open loop) from readings it gets from closed loop operation. It makes those assumptions from either referencing the MAP sensor or MAF.

I also am going to assume now that the only reason the 02s are even there is to achieve /Stoichiometric. Which, if the assumption is true, then higher load levels (once open loop), adjustments made with a PCV will be un altered by the ECU.

Correct, and the reason you have to disconnect the stock O2 sensors when you fit a PC.

N.

[RansomT]

In an around about way what I am getting at is that you could leave the stock sensors in place and tune only 80-100% cells allowing the ECU to tune the rest. That way you would get gas mileage and peak performance. Even with an autotuner, you could only alter the higher cells ... but of course, you would have to weld in 02 bungs.