...what is what LOL it has a series of LED's that keep going up and down ....It has green amber and red ones...when on the last red LED another green LED lights up?

What does it all mean!!!!!

 

in reality phil, it means that anything one side of half way is lean (usually left by convention) and other other side of half way is rich, which is why it looks like it flies around so much.. at WOT on boost I'd expect it to show steady rich fairly much up one end, depending on the LED display characteristic. Quite likely they may all go off completely at the other end when you lift off.
It is possible to expand the middle part of the display characteristic in the electronics to give a more "linear" look to the way the LED's light up, but it's contrived really unless it's specifically calibrated to the individual sensor example and the temperature of the sensor is controlled.

 

Didnt you read what we wrote yesterday Phil?

Its VERY simple to understand.


Have another read:

https://passionford.com/forum/viewtopic.php?t=174030


The key thing is that the sensor is ONLY guarenteed to read above or below 14.7 its NOT calibrated for anything at all either side of that.

 

So is a narrowband gauge actually a waste of money?

 

That would depend on what you are using it for.

If you want some pretty lights that tell you if you are richer or leaner than 14.7 then its ok.


The key thing is that on boost you want to be running high 11s or so typically.

If you were to run 13s it would be lean enough to melt your pistons and warp the head, but the narrow band gauge would still say "fully rich"


Personally i would sooner have nothing at all than a gauge that tells me the opposite of whats happening TBH

 

Cheers Chip.

Sorry for hi jacking your post Phil.

 

waste of money i think................

 

Chip why do you always come on MY threads shouting the odds you jumped up prick

Maybe you should READ the thread first Again for you..i was asking what it all meant in the LED department ie what did red mean etc I know they are no good but its IN this car and just was asking about it

Please feel free though to now add your usual bollocks of twisting and trying to act smart

 

it's useful as long as you appreciate the limitations, and like chip says having the "rich" light on won't mean it's neccesarily rich enough. But you can tell if something is badly amiss as I said yesterday - MAP sense pipe coming off the fuel pressure regulator for example will show lean on boost no problem
I built my display myself, with scale modifications to suit what I want so I know how the LED characteristic relates to the sensor, which does make it a bit better, but on a commercial unit you've got little way of knowing much more than "lean" or "rich"

 

Phil, which bit of my reply didnt you understand?

Red = leaner than 14.7
amber = 14.7
Green = richer than 14.7


Thats ALL anyone can tell you them mean, no one can say "3 red = 15.1" because the guage is NOT calibrated to the sensor like that.


I always come on your threads and explain to you how things work, other people are perfectly capable of reading what i write and learning from it, but you have such an enormous chip on your shoulder or case of jealousy or paranoia or something you are unable to see that im actually giving you EXACTLY the correct answer to your questions!

 

Off to the dummy room

 

To be honest though RichM, even in the map sense pipe coming off situation is it REALLY useful? Cause personally i would notice that something was wrong just from how the car drove in that situation, unless possibly you were cruising at about 2 psi or something, so really i think its a dangerous thing to have generally as it gives you a false degree of security "oh the gauge says rich so im safe" when in fact you arent.

 

Red means brake ... green is acceralate hard and amber means the same as green but apply the handbrake at the same time.... hope this helps

 

Yet another jealous wannabe

 

chip, everyone has their own interpretation of "useful" I guess. Personally I find it useful, but I'm fully aware of the limitations and with the scale modifications I've done in making the display myself I know how it behaves in relation to the sensor, so maybe a little more useful than something off the shelf. I agree in most cases a commercial unit chucked in a car and hooked up to any old sensor won't be much better than disco lights, except in some specific situations. I use the FPR pipe as an example that "hopefully" most people will understand.
If you want something that approaches what a wideband does, or the display has any form of AFR indication on it othere than 14.7:1 then your just kidding yourself..

 

Its a shame they dont make a 12.0:1 AFR narrow band sensor really!