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Home > Help Needed / General Tech Chat > Lambda AFR Monitoring

ian2000t

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143 Posts
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Halesowen

When I build the turbo engine, as it will be a (nearly) daily driver, I was thinking of running an AFR gauge - partly for initial setup, but also for monitoring purposes to alert me to any problems before they cause damage.

I've heard Narrowband/Wideband sensors, but not sure of the difference.

What does everyone else use? How much am I looking for a kit?

1994 Mini Mayfair, 1330, Mspd Ph2 cam, Benross turbo head, 9:1, GT1752, TT Intercooler, MegaJolt, BMW M3 leather seats.


lee.pb

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Lancashire

Best with the wideband.

AEM

http://www.ebay.co.uk/itm/AEM-GAUGE-6-in-1...=item46139920be

What the mind can conceive the mini can achieve
MITP 2012 17.01 seconds 1/4 mile against "The Don"
MITP 2013 16.83 seconds 1/4 mile


ian2000t

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143 Posts
Member #: 2764
Advanced Member

Halesowen

Wow, that's really not cheap is it?

I actually don't have room for the gauge so was thinking of making something (although rather crude) to fit in the top dash rail ashtray:

Something like this:

http://sales.nightrider.com/narrow-band-afr-gauge.html

http://www.redline.lt/293/diy-airfuel-rati...920&height=1080

Is it the gauge that is Narrow/Wide, or the sensor? Or both?

1994 Mini Mayfair, 1330, Mspd Ph2 cam, Benross turbo head, 9:1, GT1752, TT Intercooler, MegaJolt, BMW M3 leather seats.


slater

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Suffolk / Birmingham

For it to be any real use you need a wide band.


Brett

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Doncaster, South Yorkshire

Forget all gauges if your doing any type of setting up or tweaking you need a wideband afr gauge anything else is risking it

a narrow band would do just for a baseline check then get it to some one who knows what there doing and leave it as its set

Yes i moved to the darkside *happy*

Instagram @jdm_brett


jbelanger

1267 Posts
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Montreal, Canada

Have a look at this: http://www.14point7.com/products/slc-free

http://www.jbperf.com/


Turbo Phil

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My sister is so fit I won't show anyone her picture

Lake District

A narrowband is better than nothing at all, but for £150 I'd say a wideband was a cheap investment to protect you from a potentially very expensive engine rebuild.

Phil.

WWW.TURBO-MINI.COM


Carlzilla

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Quarry Bonk

AEM or Innovate wideband would be possibly the only two I'd ever fit mate

On 26th Jan, 2012 Tom Fenton said:
ring problems are down to wear or abuse but although annoying it isn't a show stopper

On 5th Aug, 2014 madmk1 said:
Shit the bed! I had snapped the end of my shaft off!!

17.213 @ 71mph, 64bhp n/a (Old Engine)


Carlzilla

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Quarry Bonk

That's an interesting piece of kit Jean, is this something that has been tested and proven? Wouldn't take much to dash mount this or even put it in a plastic enclosure. Much cheaper than anything else on the market too.


On 1st May, 2014 jbelanger said:
Have a look at this: http://www.14point7.com/products/slc-free

On 26th Jan, 2012 Tom Fenton said:
ring problems are down to wear or abuse but although annoying it isn't a show stopper

On 5th Aug, 2014 madmk1 said:
Shit the bed! I had snapped the end of my shaft off!!

17.213 @ 71mph, 64bhp n/a (Old Engine)


jbelanger

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Montreal, Canada

On 1st May, 2014 Carlzilla said:
AEM or Innovate wideband would be possibly the only two I'd ever fit mate

There are many people who would disagree with you and you can find people who will say bad things about all wideband controllers made.

So unless you have made tests with calibration gases, I would be careful about recommending one over the other. The AEM may be easy to set but there are many reported issues about the AFR output values. And the Innovate has had many reliability issues and being picky with the sensor used.

Having said that, these units would probably be fine in this case (but I would never personally use an AEM). The 14point7 units I linked to are also worth a look and I'm confident in their value but there might be delays in getting them.

Jean

http://www.jbperf.com/


jbelanger

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Montreal, Canada

On 1st May, 2014 Carlzilla said:
That's an interesting piece of kit Jean, is this something that has been tested and proven? Wouldn't take much to dash mount this or even put it in a plastic enclosure. Much cheaper than anything else on the market too.


On 1st May, 2014 jbelanger said:
Have a look at this: http://www.14point7.com/products/slc-free


I am not aware of independent reports about them since this is relatively new but from what I've seen from Alan To (the guy behind 14point7), it is based on technology used in some of his products with cheaper and easier to assemble components. It should be slightly less accurate than his SLC product mainly due to the DIY aspect but we're talking minimal amounts here in the order of 0.02 Lambda if I remember correctly.

Alan tests all his units and has also tested many of his competitors with calibration gases and not some random test on an engine. So he can get repeatable results which shows how his products reliably give precise results with new and old sensors and how badly some other units do.

Jean

http://www.jbperf.com/


stevieturbo

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Northern Ireland




On 1st May, 2014 ian2000t said:
Wow, that's really not cheap is it?

I actually don't have room for the gauge so was thinking of making something (although rather crude) to fit in the top dash rail ashtray:

Something like this:

http://sales.nightrider.com/narrow-band-afr-gauge.html

http://www.redline.lt/293/diy-airfuel-rati...920&height=1080

Is it the gauge that is Narrow/Wide, or the sensor? Or both?


Modern widebands arent cheap...they're an absolute bargain. Which is better than cheap.

Anything narrowband related is a complete and utter waste of money for tuning purposes.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


jbelanger

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Montreal, Canada

On 1st May, 2014 stevieturbo said:

Modern widebands arent cheap...they're an absolute bargain. Which is better than cheap.

Anything narrowband related is a complete and utter waste of money for tuning purposes.


Totally agree.

http://www.jbperf.com/


Rod S

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Formally Retired

Rural Suffolk

^^^^^

What they both say.

I also concur with Jean about the Innovates being unreliable - both myself and Graham have had one (each) go intermittent.

Never tried AEM but until very recently I was primarily using TechEdge - very reliable even though I was using the DIY versions.

However, the TechEdges became incompatible with my current needs so I too have moved to 14point7 stuff - not the version Jean linked to (as Jean is well aware, have a look at his forum http://forum.jbperf.com/viewtopic.php?f=9&t=1360 if you want to see what can be done with some of 14point7's other controllers).

The only slight warning is that myself, and one other forum member, did have some "customer service" issues with Alan (Alan is 14point7) in the past. It's what delayed me from making the change but it does seem to be history now from the reviews his stuff gets on other forums.

Also, remember it comes from Canada so can sometimes take a while.

Schrödinger's cat - so which one am I ???


TurboDave16V
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SouthPark, Colorado

On 1st May, 2014 ian2000t said:
Wow, that's really not cheap is it?


If you don't want to pony up the money for a wideband, I'd suggest a different hobby. Even if you buy one and put it on temporary bracket or even duct tape for the few days while setting up your car and shaking it down, it is worth every penny.
Consider it as basically another tool in your inventory and no less important as a torque wrench, multimeter, or any other "investment".
Honestly, I remember paying well over 150 quid for a narrow-band gauge back 15 years ago - but I sure as shit wasn't going to use a colourtune and therefore justify it at the time. The Wideband is the same jump from a narrow band, as the narrowband was from a colourtune (do they even still make those things?)

Edited by TurboDave16V on 2nd May, 2014.

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY



TurboDave16V
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SouthPark, Colorado




On 1st May, 2014 jbelanger said:
Have a look at this: http://www.14point7.com/products/slc-free


Interesting - is the temp readout actually a realistic usable number for EGT, or is it moreso the temp in the sampling chamber, and just up there as a "information" output? Thinking for a non-turbo application where this could be used instead of thermocouples...

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY



jbelanger

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Montreal, Canada

The temperature is the sensor temperature. This needs to be in a specific range for the AFR value to mean anything. So that can't be used as an EGT.

That allows you to monitor if the sensor is exposed to too much heat or if there is an issue with the heater circuit. As I mentioned, both of these will skew the results and in addition, they will affect the sensor if these conditions are allowed to remain for too long. Too much heat will kill a sensor and too little will foul it.

Jean

http://www.jbperf.com/


stevieturbo

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Member #: 655
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Northern Ireland




On 2nd May, 2014 TurboDave16V said:
On 1st May, 2014 ian2000t said:
Wow, that's really not cheap is it?


If you don't want to pony up the money for a wideband, I'd suggest a different hobby. Even if you buy one and put it on temporary bracket or even duct tape for the few days while setting up your car and shaking it down, it is worth every penny.
Consider it as basically another tool in your inventory and no less important as a torque wrench, multimeter, or any other "investment".
Honestly, I remember paying well over 150 quid for a narrow-band gauge back 15 years ago - but I sure as shit wasn't going to use a colourtune and therefore justify it at the time. The Wideband is the same jump from a narrow band, as the narrowband was from a colourtune (do they even still make those things?)


I think it was around 96/97 I made my first narrowband display. It was from a cheap DIY kit. Obviously very limited, but still a help with tuning.

Roll the turn of the millenia and widebands started to appear, DIY and otherwise.

The DIY ones were still not cheap largely down to sensor cost. Relying on DIY build didnt always go well for me lol.
I bought an FJO Wideband kit in 2001 and it cost around £600....so really...£150 these days is such a bagain.

That said,13 years on I still have that same wideband unit in my car, albeit replaced a couple of sensors over the years. So even that purchase way back then was still good value overall.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


apbellamy

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16540 Posts
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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

If the AFR gives you the ability to tune your own car, think how much money you'll save on rolling road time...

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


John

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Mongo

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Saved us a fuck-ton with the van

If something is worth doing, it's worth doing half of.


stevieturbo

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Northern Ireland




On 3rd May, 2014 apbellamy said:
If the AFR gives you the ability to tune your own car, think how much money you'll save on rolling road time...


AFR just gives you some feedback to assist tuning the car...

Some people could have 100 widebands and still not a fucking ounce what to do with them ! lol

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


apbellamy

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16540 Posts
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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

Common sense is priceless lol

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


stevieturbo

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Northern Ireland




On 3rd May, 2014 apbellamy said:
Common sense is priceless lol


And here is a perfect example of how dumb some can be. And just in case any dumb people rad this.

DO NOT BUY ANYTHING BASED AROUND A NARROWBAND SENSOR, ESPECIALLY THE OUTRAGEOUSLY PRICED PIECE OF SHIT WITH LED'S MENTIONED IN THE VIDEOS

http://www.driftworks.com/forum/engine-dri...narrowband.html

Some posts in the thread on pistonheads were removed. Advertising reasons I think, rather than the poster being a total fucktard.

http://www.pistonheads.com/gassing/topic.a...wband&mid=27545

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


TurboDave16V
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***16***

SouthPark, Colorado

wow. just wow...

On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better


Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY



Sprocket

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Preston On The Brook

That looks like a total rip off of the Lumenition narrow band unit. Infact it cound just be a re branded unit, it's that similar!

http://www.demon-tweeks.co.uk/motorsport/a...uel-ratio-meter

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........

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