PDA

View Full Version : Oxygen sensors on older cars



billca
08-19-2002, 12:45 AM
Does anyone have experience using modern oxygen sensors to monitor air/fuel mixtures on our old British cars? Seems as if it might have potential for tuning while the engine is under load.
Bill C.

aeronca65t
08-19-2002, 08:41 AM
Go Here:

https://www.racerpartswholesale.com/afratio.htm

I buy from these guys all the time...good place!

________________________________________________

...this message brought to you from the Jersey Shore

martx-5
08-19-2002, 05:41 PM
<blockquote><font size="1" face="Verdana, Arial">quote:</font><hr>Originally posted by billca:
Does anyone have experience using modern oxygen sensors to monitor air/fuel mixtures on our old British cars? Seems as if it might have potential for tuning while the engine is under load.
Bill C.<hr></blockquote>

I don't have experience with older cars, but I have one on my Supercharged Miata. You don't want to run lean with forced induction (or any other time for that matter). About a month ago, the Miata started to run lean. I wouldn't have known without the gauge. Anyway, it turned out to be a fuel pump that was just getting tired. I replaced it, and everything back to normal. I opted for an analog A/F gauge, because they are buffered, the LED gauges dither too much.

Westach (https://www.westach.com) has them.

08-19-2002, 06:37 PM
I own a Dynojet248h dynomomiter with a wide band O2 sencor. I use it to tune all sorts of cars most every day.
To answer your question, yes it will help you tune your car.
I would go to a dyno shop in your area that has a wide band O2 and tune it there, then use your gauge like a warning light. I have seen alot of diferent gauges. Some are acurate some are not all have the tendency to make the driver a nervous wreck.
The O2 sencor that I use in my dyno cost $400, just the sencor.
You will get what you pay for
Tune tip: Most NA cars run best around 13.2/1AF.
Your AF gauge will read this as rich.

piman
08-21-2002, 03:14 AM
Hello Billca,

I have recently installed a lambda sensor on my Triumph 2.5 P.I. saloon (1967) and monitor it using a didital multimeter. So far I have not done much except prove that I can check how the mixture is under load and engine RPM. I haven't had time yet to start tuning and see what gains I get. In theory it should give me a rolling road effect as far as mixture goes.
Alec.

ThomP
10-26-2002, 11:02 PM
I too have an interest in this subject. Here's a link that hints at the possibilities...
&lt;https://www.jetlink.net/~okayfine/su/airfuel.html&gt;

Yeah it's for a Datsun SU, but the theory is still correct.

billca
10-28-2002, 12:03 AM
ThomP,
Thanks for the reference. Excellent article. I'm glad to see there are some folks with lots of experience using these tools.
Bill C