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| redneckmx6
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| Posted:Apr 12 2003, 01:02 PM |
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You should really have one to monitor your air/fuel ratio if you are going to run boost or the juice. Never can you be to careful and this could save your engine by warning you of a lean condition before you grenade your parts all over the street. I haven't installed mine yet. I wanted to monitor the a/f ratio but didn't want to by the gauge. So I built one using an Australian based company called Jaycar. The kit comes with everything you need plus some parts. Even with shipping all the way to the U.S.A. it only came to $26. As a student at a Computer Tech school I had most of the pieces anyway (and the experience to put it together, not that you need it, the kit has very easy to follow directions for those who are not experienced in this), just needed the board.
Now there is one more thing I can say I built on my car 
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Yes it's a turbocharged FE3, (soon on the bottle) and NO you can't drive it
WARNING: Does not play well with others (it seems others have a problem with losing)
My Beast
| QUOTE | posted by 90tx5
cheers
you r like the car god on this forum |
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| mx68u
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| Posted:Apr 12 2003, 08:33 PM |
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great simple air/fuel meter, i've built two of them 
i've heard that these units will not work correctly with our cars as the o2 sensor siginal is 10 (10 - 0) and not 1 (1.0 - 0.0) volts so you may need to place in some sort of "buffer" to get the thing working correctly? |
| redneckmx6
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| Posted:Apr 12 2003, 11:17 PM |
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I guess I will find out then
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Yes it's a turbocharged FE3, (soon on the bottle) and NO you can't drive it
WARNING: Does not play well with others (it seems others have a problem with losing)
My Beast
| QUOTE | posted by 90tx5
cheers
you r like the car god on this forum |
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| 2Rusty
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| Posted:Apr 13 2003, 01:37 AM |
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| QUOTE (mx68u @ Apr 12 2003, 06:33 AM) | | i've heard that these units will not work correctly with our cars as the o2 sensor siginal is 10 (10 - 0) and not 1 (1.0 - 0.0) volts so you may need to place in some sort of "buffer" to get the thing working correctly? |
 Is it that specific A/F meter that will not work well because it is 10 - 0 or is it that most A/F meters will not work well because our cars run 10 - 0 and not 1.0 - 0?
If it's the latter, it's the first I've heard of it. 10 volts?  My Autometer A/F works but not exactly like it should (although it seems to be at par with others who have the 2.2 turbo). Just wondering if there's more info on this somewhere.
Redneck, where are you going to mount that? At first I thought it would be cool as a HUD off the windshield but then I suppose that might get a bit annoying at night if it's going to be flashing back and forth.
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1992 MX-6 GT turbo |
| Rodhog
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| Posted:Apr 13 2003, 07:04 PM |
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Well I had one because well I had the kit sitting in the draw (don't ask how it got there)
Well I have been told by Experts - People who use the reall good stuff on Dyno's
that they don't work well on the Narrow Band EGO sensors in most cars.
You need the Wide band to get the best advantage of a EGO sensor.
The Problem is if you just monitor it an try to run high boost. You might think yes it's not leaning out yet it's still good but it might spike and you may get a quick red or Yellow of lean or over rich and that could mean a Head gasket Piston or Rod.
Now I am not saying it's a bad idea but it's not recomended to be used as a real good guide to keeping the car safe.
In real terms it's a bad tuning tool.
I had soem set one on my car which ran a almost perfect 12.4:1 ratio on 13psi and it thought it was runing fine but my cars tuned on a dyno
Put it on a stock boosted car runing 14psi and it shows both Yellow lean and red Rich sides this was on a R33 GTS-T which the owner thought was fine, yeah runing Rich can also induce Pinging which in this case lead to a cracked head +$2500
Just my experiences with them guages/ not jsut Jaycar one either
I don't like trust them.
But they are only as good as the sensor they are reading from.
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Winning is Winning
Fair or not
Perform on the Day
It's wasn't Me
RODHOG PROFILE |
| redneckmx6
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| Posted:Apr 14 2003, 01:12 AM |
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I, by no means, was only going to use this. I'm not crazy......I don't think
I am going to tune on the dyno FIRST, before I install this, that way I know where the a/f ratio sits and if the gauge works correctly, and use it in conjuntion with everything else I can monitor as a precaution.
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Yes it's a turbocharged FE3, (soon on the bottle) and NO you can't drive it
WARNING: Does not play well with others (it seems others have a problem with losing)
My Beast
| QUOTE | posted by 90tx5
cheers
you r like the car god on this forum |
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| EvilChief
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| Posted:Apr 14 2003, 11:57 AM |
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well in general A/F meters cannot give u exact stats of the A/F ratios. They only give u an indication measured by the oxygen in the exhaust fumes. Hence very inaccurate. A better way is get a fuel pressure gauge and a vacuum gauge and get ur measurements from them. Requires a little more brain power, but its more accurate. I dont wanna say A/F meters are shit or anything, i got one of those bastards in my car too, just not suitable for any higher application.
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WHOHOO ... got my opens today ... as much as it would matter to me anyway
... and 96 in the ash tray! |
| mx68u
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| Posted:Apr 16 2003, 11:30 PM |
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about the voltages with our o2 sensors im not completely sure, i remember reading it on mx6.com in the aussie regional area, maybe there is some useful information there
i pretty much agree with wats been said, its a pretty useful gauge but something that cant be used for tuning, not that any1 said that, good for just ensuring that everything under the bonnet is working as it normally should  |
