CO Meter Recommendations?

[73ess]

Looking to purchase a fairly priced ($300 or less?) CO meter to assist me with tuning my engine. Any brand/model recommendations?

[uai]

I'd rather get a wideband 02 sensor in the first step and weld some threads in my manifold.
You can check your mixture in all driving conditions.
For the CO meter I bought some old used but working Bosch 4 gas analyzer which still works standalone without a computer and I rarely used it since I have the WB02.
Cheers

Uli

[73ess]

Hmm. Really need something easily portable that I can just stick in the tailpipe of each of my cars.

[uai]

with a little fixture you can do this with a Wideband 02 too

[bliebler]

I bought a used Gunson Gas tester on ebay, sipped for $ 100. For my 73S set it at 8% at 3,000 and 7% at idle. No hesitation, backfire and plugs look great .

[edmayo]

You might consider an air/fuel ratio meter, doesn't read in C/O percentage but rather air/fuel ratio. These are designed to be portable for drive-ability testing.

[uai]

Air/Fuel mixture conversion chart (for gasoline)

FOR REFERENCE USE ONLY!!!

Lambda ---------- Air/fuel ---------- %CO
0.80 - - - - - - - - 11.8 - - - - - - - - 8.00 (RICH)
0.81 - - - - - - - - 11.9 - - - - - - - - 7.30
0.82 - - - - - - - - 12.0 - - - - - - - - 6.50
0.83 - - - - - - - - 12.2 - - - - - - - - 5.90
0.84 - - - - - - - - 12.4 - - - - - - - - 5.40
0.85 - - - - - - - - 12.5 - - - - - - - - 5.00
0.86 - - - - - - - - 12.6 - - - - - - - - 4.85
0.87 - - - - - - - - 12.8 - - - - - - - - 4.35
0.88 - - - - - - - - 13.0 - - - - - - - - 3.80
0.90 - - - - - - - - 13.2 - - - - - - - - 3.30
0.91 - - - - - - - - 13.4 - - - - - - - - 2.85
0.92 - - - - - - - - 13.5 - - - - - - - - 2.60
0.93 - - - - - - - - 13.7 - - - - - - - - 2.15
0.94 - - - - - - - - 13.8 - - - - - - - - 1.90
0.95 - - - - - - - - 14.0 - - - - - - - - 1.60
0.96 - - - - - - - - 14.1 - - - - - - - - 1.40
0.97 - - - - - - - - 14.3 - - - - - - - - 1.00
0.98 - - - - - - - - 14.4 - - - - - - - - 0.80 (2% rich mixture)
0.99 - - - - - - - - 14.6 - - - - - - - - 0.60
1.00_________ 14.7 _________0.50 (Stoichiometric)
1.01 - - - - - - - - 14.8 - - - - - - - - 0.60
1.02 - - - - - - - - 15.0 - - - - - - - - 0.30 (2% lean mixture)
1.03 - - - - - - - - 15.1 - - - - - - - - 0.15
1.04 - - - - - - - - 15.2 - - - - - - - - 0.20
1.05 - - - - - - - - 15.4 - - - - - - - - 0.15 (LEAN)

[911MRP]

A couple of old school ones that I have simply because I like them and they are around period of early 911, even though there's newer kit that I'd use




Season's greetings to all

Steve

[Norm01]

I bought this one. You can get the optional tail pipe adapter.

http://www.jegs.com/p/AEM/AEM-X-WiFi...93709/10002/-1

[304065]

Innovate LM-2 with tailpipe adapter.