Fuel Regulator

[Taz]

Someone on fleabay is selling a K series fuel regulator alledging that it helps the R1100S with after market exhausts.

Does anyone know if this is true or indeed has one fitted?

Thanks

[andrew s]

Taz,

I had a 1200RS fuel regulator fitted to my BCR, which was initially fitted by Nigel Wood who I bought it off.

The bike was fitted with Laser exhausts without baffles, Lazer chip and K&N filter. The bike pulled really well from low down and I felt it had more acceleration than the first BCR I had.

Andrew

[winger]

K series regulator is a crude way of getting a bit extra,it shovels more fuel in,but without putting the bike on a dyno your never going to know what the feck's going on with motor.

[boxerpan]

The K reg runs at higher pressure than the S one, the boxercup racers used to put the S reg on a flow bench and adjust it upwards to get more fuel in to get around the problem in case they were scrutineered. They aren't dear to buy new and be aware that they won't help your fuel consumption figures if you're bothered

[r550s]

maybe 'adjusting' was poetic licence - these things aren't adjustable! Some people found that a open can gave lean running at the top end. So, as Winger says, more fuel pressure was a crude way of richening the mixture on full chat, before the invention of the PCIII. Note that the closed-loop thingy, (which would otherwise self-defeat the extra fuel pressure), only works on part-throttle.
On the other hand - an over-rich mixture can cost power. I'd only do it as a patch-up, if the only option was a definite melted piston.

[sandbar]

......but without putting the bike on a dyno your never going to know what the feck's going on with motor.

And a dyno won't tell you too much either, because it is not like the real world. For example, the Lennies Induct famously performs badly on a dyno, but apparently works very well on the road.

What Lloyd didn't say was that the Boxer Cup racers wanted to run the K1200RS fuel regulator, but were banned from doing it because it gave more power (and was not standard). That is why they tried to play around with the OE one.

With the Lambda probe disconnected, the K1200RS regulator works well. By the way it is the same part that is fitted to the R1200GS

sandbar

[winger]

And a dyno won't tell you too much either, because it is not like the real world.

On a modern dyno thats incorrect,in fact it's complete bolloxs!!!,either run the bike stock(open pipe SJ filter) or put your hand in your pocket and do it properly.

[sandbar]

On a modern dyno thats incorrect,in fact it's complete bolloxs!!!,

I disagree. I stand by what I said.

The real world does not have an 'adjustment' feature, whereby you can get whatever result you want.

sandbar

[boxerpan]

maybe 'adjusting' was poetic licence - these things aren't adjustable....

Yes they are if you have the kit, and the need to make it look standard fromt the outside.

[Taz]

Well, I missed it on Fleabay but I've enjoyed the banter. I don't ride the thing hard so I suspect that I would not know the difference if I fitted the K series fuel regulator.

Thanks for the feedback anyway.

[winger]

On a modern dyno thats incorrect,in fact it's complete bolloxs!!!,

I disagree. I stand by what I said.

The real world does not have an 'adjustment' feature, whereby you can get whatever result you want.

sandbar

Can't teach an old dog new tricks e'h,get yourself off to a place with a modern day dyno matey,you'll realise how daft you statement is.

[sandbar]

[ I stand by what I said.

The real world does not have an 'adjustment' feature, whereby you can get whatever result you want.

sandbar

...........a modern day dyno matey,you'll realise how daft you statement is.

A modern day dyno??? They are the worst - they are finely adjustable over a very wide range. The results depend less on the skill of the operator than on their integrity. Particularly those that are commercially related to the makers of little black commercial 'performance' boxes. The older ones were inaccurate and their adjustments were pretty coarse. But they all have adjustments (sometimes called calibration) - they always have had. But you must know all that - surely?

I still stand by what I said.

Just a suggestion.

sandbar

[winger]

Well there's one thing Sandbar you seem to be able to take the meaning of being a Luddite to greater heights!!!,perhaps you'll tell us of your exsperiences of people you know who run dynos and your bikes you've had on them,includeing your S and your K,that'll at least go back a few years, people can make their own opinion ,of course i'll be more than happy to do the same!!!.

[sandbar]

Chris - I have no intention of getting into a competition of naming names because that will do nobody any good.

My experience of dynos started in 1964 at Imperial College studying the effects of varying compression ratio, bore and stroke ratios etc etc. One of the most interesting outside projects we were involved in was brake testing the experimental Jaguar engines from the factory but intended for the following year's Le Mans race. 'Grenades' is the best description of some of them.

I use the term brake testing because in those days they were just water brakes and that is where the term BRAKE horse power came from.

The first time I was aware that there is a vast difference between rolling road testing and the real world was trying to get a one off 5.6 litre Shelby engined, automatic, LWB, TVR Griffith with Ferguson 4wd and Dunlop Maxaret anti-lock brakes to work properly. It was fine on the rolling road but was abysmal on the road. The characteristics of the engine and the gearbox were totally mismatched. This did not show on the rolling road.

A few perfunctory sessions with friends Formula Fords, Mini Coopers and BMW 3.0 CSL coupes etc. over the years lead up to the present day.

I think you know some (only some!) of the recent experiences, but you may not know that I have recently spent a lot of time considering dealing with the RapidBike module. That has involved lengthy talks and negotiations with both a dyno company and a couple of dyno operators.

If you think that modern dynos are not 'adjustable', let me tell you that somewhere on a computer, there is a dyno run and chart of my K1200R showing peak power of 725 HP (on the standard exhaust ). The operator was just trying to prove a point, and if I had been a paying customer then there was no way that I could have known that anything was incorrectly set on the machine.

Anyway, that's it - I'm finished with this. I don't like Yah-Boo type conversations. I am perfectly willing to concede that your dyno experience is vastly greater and wider ranging than mine, but that does not alter the fact that I do have some background and that I am perfectly entitled to my opinion.

With reference to the main interest of this board, it remains a fact that the Lennies Induct historically has performed badly on a dyno, but apparently is great on the road.

That was - and still is my point and I stand by what I said. Luddite or not!

sandbar

[winger]

Firstly the posting will do people good,anyone thinking of going the dyno route who need to make their minds up need information,not internet gobble-dy-gook, but facts.

Dynos

Any mention of dyno's pre 2000 not even worth talking about,when Kawasaki brought out the ram air system,made all dynos redundent for some years,things have moved on,current dyno's can replicate the ram air syndrome,so much so operators need a pair of goggles on because of the wind blast,the majority of tuning is in the electronics,never mind mapping an engine on a dyno you can map them for an individual track,e'r actually for a certain corner,the majority of it is down the individual who operates the dyno/laptop.

Those on the board,know i've a mate who's probably in the top 4 engine tuners in the UK,note i say tuners,i've seen dozens of motors on a dyno mapped to a enth degree,HP were you want,fuelling,peak HP,and from the sublime to the crazy when comes to how close they run engines between perfect and going bang,it's an art,so much so i'm not even prepared to mention the make of dyno,i'd get shot,most tuners won't tell you the time of day,it's how they make a liveing.

My S was like chalk and cheese when i got it back,it's been a revelation,yes i could get a dyno read out,but he wouldn't be very happy,he's got far better things to do than fanny about with 1100s's.

The bottom line,we live in a modern world,dynos just like everything else have moved on,you want to know whats going on in your motor find a good place with a good operator,it'll money well spent.