A true good A/F meter is around $1k.
EGT is the next best thing.
EGT is the next best thing.
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Build one yourself!
How about a digital WB A/F gauge for less than half of that? TechEdge DIY kit I've got 4 PCBs, 4 parts kits, 2 display kits - all for a bit under $200. I'll still need O2s but those run as little as $117 apiece. I'm equipping multiple cars - you'd only need one of each. Most of the A/F "gauges" you see aoround are silly little volt meters tuned for a specific voltage range. Since most O2s don't have a linear response and peak at 14.7:1 (stoich) their use as a tuning tool is pretty limited. A WB meter is much more accurate and linear. A similiar setup from Motec or Horiba would indeed cost $1K+. Funny how they sell the SAME Bosch O2 sensors that the TechEdge\DIY-WB folks found being used in OEM Hondas for $117 off the net isn't it?
I've only recently gotten my parts and am just beginning to build my first heater circuit. So far it doesn't look too difficult and for the money it's certainly worth a shot IMO! If you can wield a soldering iron and follow directions with maybe a bit of electronics experience this could be your answer...
How about a digital WB A/F gauge for less than half of that? TechEdge DIY kit I've got 4 PCBs, 4 parts kits, 2 display kits - all for a bit under $200. I'll still need O2s but those run as little as $117 apiece. I'm equipping multiple cars - you'd only need one of each. Most of the A/F "gauges" you see aoround are silly little volt meters tuned for a specific voltage range. Since most O2s don't have a linear response and peak at 14.7:1 (stoich) their use as a tuning tool is pretty limited. A WB meter is much more accurate and linear. A similiar setup from Motec or Horiba would indeed cost $1K+. Funny how they sell the SAME Bosch O2 sensors that the TechEdge\DIY-WB folks found being used in OEM Hondas for $117 off the net isn't it?
I've only recently gotten my parts and am just beginning to build my first heater circuit. So far it doesn't look too difficult and for the money it's certainly worth a shot IMO! If you can wield a soldering iron and follow directions with maybe a bit of electronics experience this could be your answer...
Working on it now
It took about 2-3weeks for it to get here. I think they may be waiting on a part right now - check their site. The assembly doesn't look to be too bad - "small" in this case means 1.5X4inches or so. There are no SMT parts, it's all pretty much normal size stuff. The parts ARE put in there a bit tightly but a normal pencil soldering iron shoudl work. If I could find my roll of solder I'd already have a few pieces mounted Head oout to their site and read the assembly instructions, there are pictures that are bigger than full size that show component placement so you'll have som eidea as to what you're getting into. I'm not far along but so far it doesn't look like this will be too bad...
It took about 2-3weeks for it to get here. I think they may be waiting on a part right now - check their site. The assembly doesn't look to be too bad - "small" in this case means 1.5X4inches or so. There are no SMT parts, it's all pretty much normal size stuff. The parts ARE put in there a bit tightly but a normal pencil soldering iron shoudl work. If I could find my roll of solder I'd already have a few pieces mounted
Head oout to their site and read the assembly instructions, there are pictures that are bigger than full size that show component placement so you'll have som eidea as to what you're getting into. I'm not far along but so far it doesn't look like this will be too bad...Thx, BLKMGC,
When you're done with assy and testing, could you please post your feedback.
Jay
When you're done with assy and testing, could you please post your feedback.
Jay
Hrmph - stuck already. Directions call for a voltage regualtor - looks like a transistor. None of the ones in th epackage look like the right one and the one transistor I KNOW is some sort of voltage handling device is NOT the right one - it goes elsewhere. Doh!
I'm going to take a second look later on and maybe have a friend assist me. Once I've got one built the others should be cake. The assembly instructions for the display unit look to be even more brief (sigh). Just need to muddle through is all - been about 12 years since I've done much in the way of electronics work
I'm going to take a second look later on and maybe have a friend assist me. Once I've got one built the others should be cake. The assembly instructions for the display unit look to be even more brief (sigh). Just need to muddle through is all - been about 12 years since I've done much in the way of electronics work
I was browsing yesterday thru the various pages of this OZ site and saw some warnings about wrong parts that were shipped, etc.
You may wanna look thru it yourself; it may save you some frustration and possible board damage.
Jay
You may wanna look thru it yourself; it may save you some frustration and possible board damage.
Jay
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