Hi after some advice on fitting afr gauge and lamda sensor kit iv seen some on ebay around £170. Its for my mexico mk2 is it just matter of driling hole in exhaust weld nut on to fit lamda? Also wheres best place to fit? Just after join from manifold to exhaust? Thanks for any advice/help
Cheers
If it's N/A you can fit it after the manifold anywhere. If it's turbo they suggest you fit it down the pipe a little, to stop the sensor getting too hot.
You can get a nut and weld it in or you can buy the round collar, which looks nicer when welded in.
This is where I put mine on my Pinto.
It only reads 2 cylinders in this position, but this is making the assumption that the carbs are all set up equally, which they are.
Last edited by dt36; 12-02-2019 at 17:28.
Cheers guys.its n/a so anywhere on exhaust is ok? I ask as if its by gearbox i can run wires through gearstick hole and under consol
Mount it in the manifold an inch or so after all pipes come together into one.
If you have a heated lambda sensor it will read the mixture soon after startup. If you have an unheated sensor (1 or 2 wires) then it can take some time to heat up and read mixture especially if it is in one of the two downpipes an just gets the "heat" of 2 instead of 4 cylinders.
One thing from that - any sensor with less than 5 wires will be a narrow band type and as such can only indicate the gases are or are not stoichiometric ie. 14.7:1 - not a sensor to use for tuning.Originally Posted by Miniliteman
Indeed, but a normal sensor is good enough to "keep an eye on the mixture" .
Not really - it'll just reliably tell you you are running rich / fat but with no numbers - NB guages are usually a series of coloured LEDs - Red Amber and Green then Amber again with green being the 'ideal'. If its important to you to know - get a wideband that will provide useful info and a number!
Probably an obvious answer due to ground clearance issues but don't mount it below 10degrees from a horizontal plane. This is due to condensation contamination on start up.
Thanks for all the info guys. Not going to use it as tuning aid just to keep an eye on the webers etc
Also looking to fit vacuum gauge can i put t piece in brake servo hose or is that a no no.cheers
That's just what I meant with keeping an eye on the mixture.
Dont fit it too close to the collector on the manifold, you want it far enough downstream in the single pipe section so it will measure the average AFR of all 4 cylinders, defo dont fit it anywhere in the manifold as stated above otherwise you will be measuring AFR from from not all of the cylinders, also mount it above 3 or 9 oclock otherwise the sensor gets wet and gives false over rich readings, Innovate wideband ones work well, ive had one fitted for years.
Posting Permissions
Reply With Quote
Bookmarks