Shamelessly taken from another site.

[Dave63]

New values for HD's a/f readings. Lambda values, used in cars for years. No longer 14.7:1 is stoich, rather 1.00 is... read on. 2010 models only.....

Yes the new DBW touring bikes for 2010 will be replacing the AFR tables with Lambda based fuel tables. The new calibrations will be a 218 level.
The VE tables will be calibrated in MAP (kPa) not throttle positions any more...this I find very interesting.
You TTS owners....update your software and you can read all about the tuning changes with the Lambda based tables in the Tuning Guide...I'm sure you will find this very interesting.
The auto industry has been using this Lambda system for years and it will be more accurate fueling for the Harley also, but, it is a bit awkward getting your head wrapped around a whole different way of looking at fuel values....no more AFR. Example; Stoitch with AFR values is 14.68, this is something we are used to looking at however stoitch in Lambda is 1.000. Any value higher than 1.000 is leaner than stoitch and any value lower than 1.000 is richer.
With this new system we will be able to get a more controlled Closed Loop area (the bias voltage tables will be gone) To V-Tune your bike the fuel table will be set at .981 not 14.6 any more. The value of .981 equals 14.4 afr.
While in closed loop you can set less loaded cells with a leaner value and the loaded cells with a richer value....its really cool. The Lambda values will range from 1.020=14.97 to .967=14.20 in closed loop (I think) and to much richer values in open loop.
So you ask why the change...and that is a good question. With todays fuels (E10 and E85) stoitch changes....ie... the stoitch for gas as we know it is 14.68 however when using corn gas it takes more volume of fuel to produce the same amount of energy that gas does so E85 stoitch rating is 14.28. Here is where Lambda based values come in.....no matter what the fuel is stoitch is 1.000 = 14.68 for gas and 1.000 = 14.28 for corn gas. I believe we will be able to select a blend of fuel....Blend A or Blend B and not have to retune for these different volumes.
There is a lot to this Lambda stuff and knowing it was coming I did some research on it through the net last year so I'm ready....how about you guys? .....get to reading....lol

[gruss]

Great read Dave...
After spending nearly 2 years working with CNG converted truck fleets in my area, i became very involved with the lambda sensors, as well as the current auto AFR sensors, as the struggle with a conversion is to marry the stock computer to the CNG side of the house while keeping close loop operation.
While i agree with the logic behind the lambda, i still feel after all of the changes coming our way, that this will drive the motorcycle community down the same road as the auto industry.
It will effectively stop all modifications that affect the A/F ratio, and code the computer such, that the engine will not be allowed to run by software-or firmware design. alternate or enhanced fuel systems in the auto world are finite. They are purpose built with little or no margin for modification, rendering the machine, and its computer untouchable without violating all manner of EPA laws.
So in short, the days of re-maps, pipe mods, air cleaner mods, and most other design changes to increase performance, will be coming to an end.
I'm unsure of this, but do the current harley big twins include the crank position sensor, the mass air flow sensor, the pipe mounted o2 sensor, and the exhaust gas temp sensors?
If so, then i think its only a matter of time before we see the "new" engines running "stoich" and no other performance mods will be accepted.....because doing so would violate the Current EPA standards for motorcycle emissions.
I'm sure the new systems will include the "plug and play" emissions testing system that no longer sniffs the tailpipe, but instead , just plugs into the machine and reads the last year of data from the emissions monitoring system. Any attempt to fool the system by clearing the history prior to the test will result in a fail.
This would require a new mapping history to be built in the computer by running the machine for several hours or days, to create a passing history....this is simply more government control in the name of "green".
and my very humble .02
g

[Dave63]

Greg, I hear ya and agree whole heartedly, but you and I both know, that saying "It can't be messed with" is just fodder for someone to go ahead and figure out a way....

[gruss]

Originally Posted by Dave63

Greg, I hear ya and agree whole heartedly, but you and I both know, that saying "It can't be messed with" is just fodder for someone to go ahead and figure out a way....

God Bless 'Em Dave !!!
Let the map hacks begin !!!

[51panrider]

Oh, they will find a way lol. May cost yet more coin then we already gotta kick out.....Then comes inspection time!!!! I'm sticking with the Bikes I got now and thank God I got them!

Rob

[EZE RIDER]

Am I missing something? There are no emission tests during the inspection in New York. Are they about to start?

Good info here. Thanks.

[Dave63]

Originally Posted by EZE RIDER

Am I missing something? There are no emission tests during the inspection in New York. Are they about to start?

Good info here. Thanks.

No Ed. The emissions Greg was refering to are the Federal guidelines that vehicles fall under in order to be manufactured.

They have to meet certain safety, emissions and fuel mileage criteria to be approved for mass production to the American public.

[gruss]

Just got done reviewing the proposed legislation for motorcycle emissions for california. it got beat down, but i would suspect that IM testing for the motorcycles is just around the corner. As they increase in numbers, the fed will want to take advantage of the "new" profit center.....dang i hope not, but it seems that once cali is on board, the rest of the country will follow suit.
the air resource board is pretty powereful...to say the least.
g

[Dave63]

Originally Posted by gruss

Just got done reviewing the proposed legislation for motorcycle emissions for california. it got beat down, but i would suspect that IM testing for the motorcycles is just around the corner.

They have it in parts of AZ.

[gruss]

Originally Posted by Dave63

They have it in parts of AZ.

And according to several other State listings, it's being proposed.....well, dang near everywhere.....I'm affraid it's gonna get tough for alot of folks with new bikes they wish to mod. Just more control over us. Heck, is nothing sacred?
g