DIY_EFI Digest Wednesday, January 19 2000 Volume 05 : Number 029 In this issue: Re: Lamda sensor mounting RE: Lambda sensor mounting Re: DIY_EFI Digest V5 #27 Leaded EGO sensor Re: Leaded EGO sensor Re: lamda sensors See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Tue, 18 Jan 2000 20:00:39 -0000 From: "Gareth Jones" Subject: Re: Lamda sensor mounting > Hi, > > I am running a Mini with a highly tuned A series engine (100bhp from a > 1.3litre). It has a carb and Distributer but I am thinking about adding a > Lamda sensor with a dash mounted gauge so that I can Keep an eye on the > mixture. > > Where in the exhaust system is the best place to mount the sensor? Close to > the head? 6ft down the exhaust? I have a Long center branch exhaust > manifold which doesn't bring the ports together for about 3ft after the > cylinder head. The manifold is also new (and expensive) so I would prefur > to mount is in the exhaust if it doesn't affect the reading. > > I plan to get a sensor from a car in a scrap yard are there any UK (comon) > makes of cars that have better Lamda sensor than others? > > In the UK they recently banned Leaded petrol. They made Lead replacement > petrol available to 'replace' it. Does LRP clog lamba sensors like Leaded > petrol does? I can run Unleaded but LRP has Higher Octane rating than > Unleaded and is cheaper than Super Unleaded. > > Thanks, > > Ade > > Hi Ade, I had a mini catalogue a while ago which listed an LCB Y peice with a boss for mounting a lambda sensor. Unfortunately I can't find the catalogue anymore, but I would suggest you try the usual big suppliers MiniSpares, MiniSport, MiniSpeed, etc. I bet you non mini owners just can't believe the cunning originality in these names ;-) Or maybe even try going directly to somebody like Maniflow. Either way it would be cheaper than wrecking a whole LCB. Gareth Jones ------------------------------ Date: Tue, 18 Jan 2000 21:18:58 -0000 From: "Rich M" Subject: RE: Lambda sensor mounting Ade, I've no experience with minis but I have done the same as you propose with a 2.0 pinto engined Escort and 1.8i Vauxhall Cavalier. I mounted in both cases at the end of the manifold/downpipe (below floor level, using a heated Bosch 4-wire sensor. With the heater powered, the sensor operates right down to idle, with the heater off, the sensor doesn't stay hot enough at idle but is fine under driving conditions. The sensor I used was ex. Rover, and is the same one used throughout the range of 'K' series engines and 'T'/'M' series. (ie, 200's, 400's, 600T, 800 4-cyl.). Vauxhall use a very similar sensor on Motronic (Bosch multipoint) systems; TBi (Multec) applications use a single wire unheated Rochester sensor which needs to be close to the engine to work properly. Hope this helps. Rich. > Date: Sun, 16 Jan 2000 14:47:33 +0000 > From: Ade + Lamb Chop > Subject: Lamda sensor mounting > > Hi, > > I am running a Mini with a highly tuned A series engine (100bhp from a > 1.3litre). It has a carb and Distributer but I am thinking about adding a > Lamda sensor with a dash mounted gauge so that I can Keep an eye on the > mixture. > > Where in the exhaust system is the best place to mount the > sensor? Close to > the head? 6ft down the exhaust? I have a Long center branch exhaust > manifold which doesn't bring the ports together for about 3ft after the > cylinder head. The manifold is also new (and expensive) so I would prefur > to mount is in the exhaust if it doesn't affect the reading. > > I plan to get a sensor from a car in a scrap yard are there any UK (comon) > makes of cars that have better Lamda sensor than others? > > In the UK they recently banned Leaded petrol. They made Lead replacement > petrol available to 'replace' it. Does LRP clog lamba sensors like Leaded > petrol does? I can run Unleaded but LRP has Higher Octane rating than > Unleaded and is cheaper than Super Unleaded. > > Thanks, > > Ade ------------------------------ Date: Tue, 18 Jan 2000 16:52:23 -0500 From: "Bruce Plecan" Subject: Re: DIY_EFI Digest V5 #27 Bring cash. Grumpy | > How does the hot exhaust gas cool the fresh charge.... Or have I got this | > wrong and you mean that the exhaust gas isn't heating the cool intake | > charge and the cold intake charge is causing the detonation???? | | Believe it or not... the gasses coming from the EGR have had enough time to | cool enough so that the portion of exhaust temp re-entering the intake port | is cooler than the intake manifold. (Thus, EGR valve only opens when the | engine is at "operating temperature".) But if engine knock is only apparent | at something other than high engine loads and/or speeds... I'd be willing to | bet dimes to dollars it's due to the EGR being disconnected or inoperable. | | Scott | ------------------------------ Date: 19 Jan 2000 13:10:43 +1200 From: "Tom Parker" Subject: Leaded EGO sensor I just been discussing EGO sensors with Boris Shapiro Correct. But... >Bosch lambda sensor catalog number 0258003083 will do. It's been developed >for early Fiat Uno Turbo that ran on leaded fuel. It's got different >construction to other units. You can use it without a worry. - -- Tom Parker - parkert@xxx.nz - http://www.geocities.com/MotorCity/Track/8381/ ------------------------------ Date: Tue, 18 Jan 2000 19:48:38 -0500 From: "Bruce Plecan" Subject: Re: Leaded EGO sensor O2 sensors and unleaded vary by manufacturer, If you go thru the archives you'll see several instances of folks going for years overseas with their stock gm sensors. On the GN list they have problems killing O2 sensors on unleaded, but the AC/Delco last the longest. I'm sure the 1400+dF EGTs help to kill em as fast as possible. The hole in most stories is that they ignore the fact that many countries still use leaded, and are using O2 sensors. Grumpy | I just been discussing EGO sensors with Boris Shapiro Correct. But... | >Bosch lambda sensor catalog number 0258003083 will do. It's been developed | >for early Fiat Uno Turbo that ran on leaded fuel. It's got different | >construction to other units. You can use it without a worry. | | -- | Tom Parker - parkert@xxx.nz | - http://www.geocities.com/MotorCity/Track/8381/ | ------------------------------ Date: Wed, 19 Jan 2000 09:28:58 +0100 From: "Espen Hilde" Subject: Re: lamda sensors Hi all! To be able to read a car stoiciometry or not , without all the fuss of mounting the lamda sensor I have made myself a 3" 0,30m tube with a set screw in the end to slip over the end of the tailpipe.In the middle there is a welded bung for the sensor .The end of the tube I have bent almost flat ,1cm gap.With a heated sensor it works good , but I have not tested it against front tube mounting. Espen From: "Lowell Foo" > Subject: lambda sensors > > .85 LA would be 12.5:1 and .89 LA would be 13:1. With a heated > lambda sensor I don't think placement matters at all. I tried running > 2 Bosch LSM-11 sensors on my Talon, 1 in the stock location just > after the turbo and one in the tailpipe. The stock sensor is read by > the cars Motec ECU and the tailpipe sensor by a Fueltronics > handheld. The readings agreed within 1% on a sensor rated for > 1.5% accuracy. Also as far as I know you cannot just read voltage > off a lambda sensor because of EGT compensation but I've never > tried it. ------------------------------ End of DIY_EFI Digest V5 #29 **************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".