homemade AFR meter
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1st Gear Member
Joined: Feb 2005
Posts: 120
homemade AFR meter
A friend of mine from high school who was going through a tech school to become a mechanic had made an air/fuel ratio meter with plans he received from class. It was a pretty simple design and used about 10 LEDs to display what the afr was. Does anyone have a link to a schematic I can use to build one, or instructions? I've gotten out of contact with this guy, and I really want to have these installed on each bank so I know what's going on with my engine. I also don't want to spend the grip of cash it costs to get one from a store. Thanks for any help!
3rd Gear Member
Joined: May 2004
Posts: 947
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RE: homemade AFR meter
What good is it going to do you other then a pretty light show as the 02 signal switches from lean to rich every 1-2 seconds? you can't get an actual AF ratio without a wideband controler. your only going to get a VERY basic idea under WOT when the gauge stablizes around 800-1000 Mv.'s. but thats really not going to tell you much. Honestly A/f gauges are a waste of money. If your at a point with your car that you need one then your really at a point where you should be spending the 300-400 on a wideband controler.
I ♥ Acer
Joined: Sep 2003
Posts: 8,826
From: United States
RE: homemade AFR meter
ORIGINAL: 96SilverLT1
What good is it going to do you other then a pretty light show as the 02 signal switches from lean to rich every 1-2 seconds? you can't get an actual AF ratio without a wideband controler. your only going to get a VERY basic idea under WOT when the gauge stablizes around 800-1000 Mv.'s. but thats really not going to tell you much. Honestly A/f gauges are a waste of money. If your at a point with your car that you need one then your really at a point where you should be spending the 300-400 on a wideband controler.
What good is it going to do you other then a pretty light show as the 02 signal switches from lean to rich every 1-2 seconds? you can't get an actual AF ratio without a wideband controler. your only going to get a VERY basic idea under WOT when the gauge stablizes around 800-1000 Mv.'s. but thats really not going to tell you much. Honestly A/f gauges are a waste of money. If your at a point with your car that you need one then your really at a point where you should be spending the 300-400 on a wideband controler.
5th Gear Member
Joined: Jul 2003
Posts: 3,451
From: United States
RE: homemade AFR meter
ORIGINAL: TBIAgent69
A friend of mine from high school who was going through a tech school to become a mechanic had made an air/fuel ratio meter with plans he received from class. It was a pretty simple design and used about 10 LEDs to display what the afr was. Does anyone have a link to a schematic I can use to build one, or instructions? I've gotten out of contact with this guy, and I really want to have these installed on each bank so I know what's going on with my engine. I also don't want to spend the grip of cash it costs to get one from a store. Thanks for any help!
A friend of mine from high school who was going through a tech school to become a mechanic had made an air/fuel ratio meter with plans he received from class. It was a pretty simple design and used about 10 LEDs to display what the afr was. Does anyone have a link to a schematic I can use to build one, or instructions? I've gotten out of contact with this guy, and I really want to have these installed on each bank so I know what's going on with my engine. I also don't want to spend the grip of cash it costs to get one from a store. Thanks for any help!
ORIGINAL: 96SilverLT1
What good is it going to do you other then a pretty light show as the 02 signal switches from lean to rich every 1-2 seconds? you can't get an actual AF ratio without a wideband controler. your only going to get a VERY basic idea under WOT when the gauge stablizes around 800-1000 Mv.'s. but thats really not going to tell you much. Honestly A/f gauges are a waste of money. If your at a point with your car that you need one then your really at a point where you should be spending the 300-400 on a wideband controler.
What good is it going to do you other then a pretty light show as the 02 signal switches from lean to rich every 1-2 seconds? you can't get an actual AF ratio without a wideband controler. your only going to get a VERY basic idea under WOT when the gauge stablizes around 800-1000 Mv.'s. but thats really not going to tell you much. Honestly A/f gauges are a waste of money. If your at a point with your car that you need one then your really at a point where you should be spending the 300-400 on a wideband controler.
ORIGINAL: dc_mann8
cry baby
cry baby
5th Gear Member
Joined: Jul 2003
Posts: 3,451
From: United States
RE: homemade AFR meter
http://www.markvanderkwaak.com/dbbp/tech-tips/mm.html
Says for carburated, but that's what mine looked like.
Says for carburated, but that's what mine looked like.
5th Gear Member
Joined: Jul 2003
Posts: 3,451
From: United States
RE: homemade AFR meter
ORIGINAL: 96SilverLT1
I thought my answer was very usefull... If you would rather spend the money on something else I have some ocean front property in arizona I can sell you cheep
I thought my answer was very usefull... If you would rather spend the money on something else I have some ocean front property in arizona I can sell you cheep
ORIGINAL: pete1665
thats pretty cool fox. i'll have to make a couple of those myself.
thats pretty cool fox. i'll have to make a couple of those myself.