... voltmeter as an a/f ratio gauge - need voltage ranges
08-23-2002, 08:09 AM
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... voltmeter as an a/f ratio gauge - need voltage ranges
... i am planning on using an extra voltmeter that i have here as an a/f ratio gauge... but i need the voltage ranges for lean/stoich/rich... if anyone can help me out i would really appreciate it... thanks... ((also, sources and multiple response are appreciated, thanks))...
08-23-2002, 11:00 AM
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Re: ... voltmeter as an a/f ratio gauge - need voltage ranges (1.8T_EG)
A standard one-wrie O2 will provide 0.1V (rich) to 0.9V (lean) with stoic right at 0.45v. It is a sharp transition from rich to lean.
A heated wideband O2 will provide an almost linear response from ~2.7V (rich) to ~4.6 volts (lean). That is one reason why they are so accurate, they have a wider linear band to work with along with other things.
Your volt meter will have to be pretty accurate to correctly display the A/F. it won't be perfect because the voltage is also exhaust temp dependant (how hot the sensor is).
Randy
A heated wideband O2 will provide an almost linear response from ~2.7V (rich) to ~4.6 volts (lean). That is one reason why they are so accurate, they have a wider linear band to work with along with other things.
Your volt meter will have to be pretty accurate to correctly display the A/F. it won't be perfect because the voltage is also exhaust temp dependant (how hot the sensor is).
Randy
08-23-2002, 11:03 AM
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Re: ... voltmeter as an a/f ratio gauge - need voltage ranges (RGAZ)
What about reading the o2 voltage off the blue wire on my SAFC?
This is from thedropshop
This is from thedropshop
A.2 (Liam182):
.89+ is rich. You wanna tune to around .90 -> .92 on a turbo Honda. I was running around .89 -> .91. Like .95 is too rich.
.89+ is rich. You wanna tune to around .90 -> .92 on a turbo Honda. I was running around .89 -> .91. Like .95 is too rich.
08-23-2002, 12:26 PM
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Re: ... voltmeter as an a/f ratio gauge - need voltage ranges (legendboy)
Hehe, trying to tune the rich end of the scale with a narrow band O2 sensor + voltmeter/af gauge is a bad idea. While you are out shopping for a volt meter you should buy some pistons.
I have a wideband, and often when my Autometer AF gauge connected to stock O2 reads full rich, my wideband reads 14.0:1. The factory O2 sensor is only good for tuning cruise/part throttle when you are targeting 14.7:1.
Dustin
I have a wideband, and often when my Autometer AF gauge connected to stock O2 reads full rich, my wideband reads 14.0:1. The factory O2 sensor is only good for tuning cruise/part throttle when you are targeting 14.7:1.
Dustin
08-23-2002, 05:21 PM
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Re: ... voltmeter as an a/f ratio gauge - need voltage ranges (GMoney)
check autometers web site, there is a pdf file for you to download that shows the voltage graph.
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