After Market performance air filters

[Gundog]

Did anyone who has put in the aftermarket air filter find that they needed to adjust fuelling?

[chriscanning]

Short answer i’d Say no on a 1300.

Long answer the previous 1200, particularly the 04/06 which could only be described as work in progress really would be suck it and see, probably OK but both the 04/06 and 07/08 1200s’s really were pretty basic.

Having said all of the above remember going to collect a long term 1300r that MCN had from Vines and I got to ride that and it was absolutely pants.

[Phmode]

Did anyone who has put in the aftermarket air filter find that they needed to adjust fuelling?

I had K&N filters in my K12S (2004 vintage) and although I fitted a Power Commander III it ran with a zero map in for the remainder of its time with me. The only problem I had was at high altitude, high as in The Alps, when it would run on into hairpins with a closed throttle and those following reported a smell of petrol at that moment.

Otherwise it ran fine once the later airbox and ICV were fitted and the ECU updated at the dealers.

[chriscanning]

Blimey with zero map pointless in even having it fitted, and the PC111 is a world away from a PCV and I say that with a bike that has a PC111 (1100s) and an S1000XR that has a PCV, the major difference apart from finer tuning the latter eliminates the lamba.

Which brings me to my next search an o2 Eliminator for my K, already done it with a couple of other bikes and it makes a major difference because the fuelling isn’t trying to disappear up its own as trying to find the impossible and stops all the hunting.

[Phmode]

You are right Chris, but my '04 bike was never returned to Germany and still had the original bucket and spade fuelling system so had the fuelling refinement of a raging bull.

I bought the PCIII (state'ish of the art at the time, 2011) to help fix the on/off throttle and having stripped it out to fit it, my neighbour enquired 'what's wrong with it now?'. Turned out he worked for BMW financing so took my tale of woe to the techies and came back with the airbox and ICV swap kit.

The PC was already plumbed in and I wasn't going to trust the updated bits. As it turned out they did the job and so the zero map stayed in till this very day as far as I know. Unused, but still fitted.

[chriscanning]

There are certain things in life one remembers....my first time on the Dover/Calais car Hovercraft was on , on par with the all most new 2006 Blue/White K1200s demonstrator out of Clark’s BMW and both times the thought in my head were ‘HTF are they selling this scht too the public’

Even though the K did show 170.

[Sutty]

Had mine looked at by BSD, more than happy with the results, the chart shows 165 bhp with a SC Project can and K&N, not sure if different headers would give any increase.

Best regards  Mick

[chriscanning]

Having had dealings with BSD their good people but dyno readings have come on in years just like everything else, what really tells the story is the A/F and you guys who have never seen one the flatter the two are they the better the fuelling.

[Sutty]

I didn’t get a print out of the fuelling , but the guy spent a while tweaking it and to be fair there’s no popping or banging, clean on the overrun and pulls hard in sixth from low revs.
Money well spent.

[chriscanning]

That dyno run was for my S1000X/R,I got caught between a rock and a hard place with my K, 9 years ago piggyback was finished so I went with a Rexxer map, it’s pretty good and they spent hours with it on a dyno, but hind sight being what it is, a PCV is what is really needed,they delete the lamba as well.

[Sutty]

The first thing the guy done was remove the lambda, to be fair he did try to explain what he was doing /trying to  achieve but he lost me early on in the process.
I had an 08 Blade with a power commander and a full Two Brothers system, set up by a local Dynojet agent Who specialised in cars, but as Dynojet didn’t have a map for the complete Two Brothers set up it was done over the Internet by D Jet , that was 170 at the wheel and as clean as a whistle.

Best regards. Mick

[chriscanning]

Looking at the print out it was done a while back ?,shame you were not paying attention  ,what i’m Intrigued about is them taking the lamba out, currently this is the norm i’ve done it with both XR and KTM GT and it’s a major improvement you can buy a resistor that you plug into the loom when taking the lamba wire out.

But.....I cannot find such for a K,the only other solution is fitting a Power Commander V which deletes the lamba and stops it working so what dud BSD do ?

What is quite amusing...us the general public have been victims of a great con,we were told that lambas were all about getting the correct fuelling when in actual fact just another TUV driven thing and we have ended up with fuelling systems disappearing up their own back side, both the X/R and GT are a world better and just in the process of doing my antique 955 Tiger just waiting for a lamba plug.

[Matt]

Your last paragraph sent me off to Wikipedia to read about O2 sensors. Quite interesting! They are used everywhere!

In essence they are there to look after the engine, the cat, and control emissions related to overly rich and overly lean running. Outright power and 'smoothness' of that delivery are for sure lower down on the priority list. Which is pretty fine within reason (ref. Bri's old machine) given we're killing so many penguins and dolphins.

Also I didn't realise until reading the Wikipedia article that NOx gasses turn up when the combustion chamber goes over 1,300 kelvin. So it's stopping that too.
I'd like to be able to view/store all the data coming from this fuelling argument the bikes constantly have when alive. I reckon it would be quite insightful.

[Belco100]

On my Euro4 K16GT I used the O2 sensors to my advantage, similar to the AF-XIEDs. The K16GT and most Euro4 bike use narrow band sensor which just just send a signal to some trims to try and get the mixture back to a preset value, which was around 14.9:1, pretty lean. This only works up to about 80% throttle (on the K16GT). I had the ECU opened up and the internal map set to 13.8:1, so the O2 sensors feed back to the short term trims and adjust it to that, and then it feeds through to the long term trims. Nowhere near as precise as a full re-map, but it works. At the same time the throttle map was updated - as standard it is very “slow” and a 75% twist only give 30% throttle, with nothing really happening until over 85% twist when it really took off. This was set to be much more linear. Also added some advance back at the top of the Rev range. Bloody Euro4.

On my 1250GSA they have wide band O2 sensors which correct the mixture almost instantly. This one was set to 13:1, the flapper valve was set to open immediately and the throttle restriction removed. Again, nice drive although.

[Sutty]

Not sure if they  fitted anything in place of the lambda sensor, the old one is in the drawer with a spare throttle pos sensor he gave me as a spare. I think they had access to the BMW mapping as there’s no piggyback units, I know with the cars there’s guys with pirate software that allow access to the greyed out parts of the programs.
The exhaust flap is disconnected and wide open as well.

Regards. Mick