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Author A/F Gauge's
chris_uk
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Registered: 8th Jul 03
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10th Jul 08 at 20:29   View Garage View User's Profile U2U Member Reply With Quote
ive been looking into getting one for the car, at first one to just see what its at, as i dont wanna be paying £45 to get a dyno run to check.

so, i was looking initially at the ones that are plug and play.. relativley..

o2sensor + gauge and its a go..

but then i came across the ones that you can program, so you can have it richer on throttle and leaner on cruising..

so my question is.. does anyone have any experience with this ?
Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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10th Jul 08 at 20:34   View Garage View User's Profile U2U Member Reply With Quote
You don't want to pay £45 for a dyno run, but you're willing to pay for an AFR gauge, lambda sensor, someone to weld the lambda boss in, a lambda controller if you use a wideband lambda, which means you need to buy a wideband lambda, which in it's self will cost more than the dyno run?

Ok then
AdamF
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Registered: 24th Apr 02
Location: Bexhill, East Sussex
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10th Jul 08 at 20:38   View Garage View User's Profile U2U Member Reply With Quote
narrowband air fuel ratio guages use one wire which is connected to the signal wire of the existing o2 sensor and are a waste of time as they just show you the lambda sensor switching back and forth.

if you want an accurate useable air fuel ratio reading (the sort youd get at a rolling road) then you need a wideband sensor kit which are around £250 and upwards
CORSA NUT
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Registered: 3rd Aug 01
Location: Wirral
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10th Jul 08 at 20:55   View User's Profile U2U Member Reply With Quote
Yep wideband is the only way to go mate...i've got a narrowband and it's usless
Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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10th Jul 08 at 21:01   View Garage View User's Profile U2U Member Reply With Quote
That's £75 gone already then
chris_uk
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10th Jul 08 at 21:15   View Garage View User's Profile U2U Member Reply With Quote
what i was thinking is that i dont have to keep going back to teh dyno and i can have it permanantly on so i can see how the car is running all the time.
Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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10th Jul 08 at 21:17   View Garage View User's Profile U2U Member Reply With Quote
Don't take this the wrong way, but it's not the kind of car which is going to go out of tune regularly. It's not a performance engine.
chris_uk
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10th Jul 08 at 21:34   View Garage View User's Profile U2U Member Reply With Quote
no i know that.. but i know right now that the car is running rich.. its just something i wanna keep an eye on.
broster
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Registered: 6th Dec 02
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11th Jul 08 at 05:27   View Garage View User's Profile U2U Member Reply With Quote
http://www.grahamgoode.com/innovate/new/dbs.html

thats what id go for if i was you.
FruitBooTeR
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Registered: 18th Jan 07
Location: Wolverhampton Drives: S15
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11th Jul 08 at 07:47   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by broster
http://www.grahamgoode.com/innovate/new/dbs.html

thats what id go for if i was you.


I will be looking into getting one of these when my conversion is sorted, are they complicated to set up and wire in?
broster
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Registered: 6th Dec 02
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11th Jul 08 at 08:06   View Garage View User's Profile U2U Member Reply With Quote
pretty straight forward, i can supply these should you want one
Superlite Ltd.
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Registered: 9th Jan 07
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11th Jul 08 at 08:35   View User's Profile U2U Member Reply With Quote
I'd just go to an MOT testing garage and have them stick their probe up my exhaust.

ooooo errrr
broster
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Registered: 6th Dec 02
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11th Jul 08 at 09:46   View Garage View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Superlite Ltd.
I'd just go to an MOT testing garage and have them stick their probe up my exhaust.

ooooo errrr


mot stations near you must have very long probes.......
jamesw
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Registered: 28th Jun 02
Location: Station Town, County Durham
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11th Jul 08 at 11:31   View User's Profile U2U Member Reply With Quote
this is what i have at the moment, same as muppetsport had.

Controller / sensor
http://cgi.ebay.co.uk/Innovate-Motorsport-LC-1-Wideband-Controller-UEGO_W0QQitemZ230268979134QQcmdZViewItem?hash=item230268979134

Gauge
http://cgi.ebay.com/ebaymotors/INNOVATE-3780-XD-16-Wideband-Air-Fuel-Ratio-Gauge_W0QQcmdZViewItemQQ_trksidZp3286Q2em14Q2el1318QQhashZitem120279993625QQitemZ120279993625
broster
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11th Jul 08 at 11:35   View Garage View User's Profile U2U Member Reply With Quote
quote:
Originally posted by jamesw
this is what i have at the moment, same as muppetsport had.

Controller / sensor
http://cgi.ebay.co.uk/Innovate-Motorsport-LC-1-Wideband-Controller-UEGO_W0QQitemZ230268979134QQcmdZViewItem?hash=item230268979134

Gauge
http://cgi.ebay.com/ebaymotors/INNOVATE-3780-XD-16-Wideband-Air-Fuel-Ratio-Gauge_W0QQcmdZViewItemQQ_trksidZp3286Q2em14Q2el1318QQhashZitem120279993625QQitemZ120279993625


its different to the one i linked too, this one is cheaper i believe
Dave A
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Registered: 10th Dec 03
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11th Jul 08 at 11:43   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Superlite Ltd.
I'd just go to an MOT testing garage and have them stick their probe up my exhaust.




totally pointless. that only measures the a/f ratio under idle or zero load scenarios.
RCS
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Registered: 26th Jan 05
Location: Lichfield/Dundee
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11th Jul 08 at 11:45   View User's Profile U2U Member Reply With Quote
I prefer analogue displays myself, quicker to read at a glance.
broster
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Registered: 6th Dec 02
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11th Jul 08 at 11:48   View Garage View User's Profile U2U Member Reply With Quote


153.18+vat for gauge lc-1 sensor fitting for exhaust etc
FruitBooTeR
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Registered: 18th Jan 07
Location: Wolverhampton Drives: S15
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11th Jul 08 at 11:56   View User's Profile U2U Member Reply With Quote
Can someone just explain because im stupid what does the gauge actually interpret.

Air/fuel yes ino but how -

Hows it measured?

No.s 8-18?

8 being?
18 being?

Just thought id get some knowledge know while were on topic
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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11th Jul 08 at 12:18   View User's Profile U2U Member Reply With Quote
8=rich
18=lean
RCS
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Registered: 26th Jan 05
Location: Lichfield/Dundee
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11th Jul 08 at 12:30   View User's Profile U2U Member Reply With Quote
It measures the air/fuel mixture strength using an oxygen sensor in the exhaust system.

A ratio of 14.7:1 is stoich for petrol (no oxygen in exhaust, complete combustion has occurred).

If there is excess oxygen in the exhaust gas the engine is running lean (AFR above 14.7) and if there is excess unburnt hydrocarbons then the engine is running rich (AFR below 14.7).
FruitBooTeR
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Registered: 18th Jan 07
Location: Wolverhampton Drives: S15
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11th Jul 08 at 12:39   View User's Profile U2U Member Reply With Quote
sSo those piks - the white one is running nice and sweet and the black one looks like its runnign quite rich?
broster
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Registered: 6th Dec 02
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11th Jul 08 at 12:41   View Garage View User's Profile U2U Member Reply With Quote
alot more to it that that.

depends if the car is NA or turbo how much load the car is under etc!
Wrighty
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Registered: 28th Feb 04
Location: Howden
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11th Jul 08 at 12:54   View User's Profile U2U Member Reply With Quote
iv just bought a afr guage, iv not got a wideband lamda..have i just wasted my monies or can i opt for a wideband sensor?
broster
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Registered: 6th Dec 02
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11th Jul 08 at 13:01   View Garage View User's Profile U2U Member Reply With Quote
you need a wideband sensor and a controller, (lc-1)

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