homemade a/f gauge good or bad for tuning

[ryan1]

i found this in the how to's what do you guy's think.
also do you think this would be a good option instead of spending a good amount of money on a wideband 02.

http://www.2gnt.com/www/corbin/dvm2.html

thanks ryan

[D323]

thats friggin sweet.

[elscotto80]

Now if only I knew how to make that.

[ryan1]

so u guy's think is good.
thanks ryan

[D323]

yea thx ryan.....

[glyph]

wow that does look really cool. I am really thinking of attempting this. But I want a blue one, which is available. SP400-BLUE

[zerocover]

I like this one. I found it a while ago.

http://www.pelicanparts.com/techarticles/mult_air_fuel_monitor/mult_air_fuel_monitor.htm

[323GT-R]

Don't even think about tuning your car using one, if you want to get anywhere close to the best and safest performance set up. Those things can be built for a few $s, for the simple reason that they make pretty lights come on and give you some idea about the state of the fuelling, but are nowhere close to accurate.

The output of the Lambda sensor is designed to indicate rich or lean, but not HOW rich or lean. The output varies with temperature as well as Oxygen content. A proper wideband set up uses a controller and monitor so that the output can be compensated for temperature to allow a true A/F reading. That's why they cost $s - because they work!

[What]

I only trust 5 wire o2 widebands. Like the man says, you can see on either side of 14.7:1, but it will never spell out how far on each side you are. Look at the voltage curve for the narrowband sensors and you should be able to see why.

A good wideband is a whole lot cheaper than they used to be. There are some without datalogging that start close to $300USD now with sensor, bung for exhaust, etc.. Datalogging feature tends to add $150-200... and then each version has some slight difference from the competetion. I currently like the Dynojet wideband commander.... looks like AEM, but has datalogging that AEM does not. A lot of the other kits, including DIY, or Innovate, or PLX, look like cheese in comparison... but will work.

Start looking for a real wideband... it's well worth the cash. That or spend the money for a dyno everytime you make a modification

[glyph]

Don't even think about tuning your car using one, if you want to get anywhere close to the best and safest performance set up. Those things can be built for a few $s, for the simple reason that they make pretty lights come on and give you some idea about the state of the fuelling, but are nowhere close to accurate.

The output of the Lambda sensor is designed to indicate rich or lean, but not HOW rich or lean. The output varies with temperature as well as Oxygen content. A proper wideband set up uses a controller and monitor so that the output can be compensated for temperature to allow a true A/F reading. That's why they cost $s - because they work!

makes sense.