Anyone have a good recommendation for an 'economic' O2 monitoring setup? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

redz 1970 K5 · 12-08-2004, 03:32 PM

I really want a decent setup to monitor my exhaust and dial in my Carter AFB carb. I don't really want to go off of feel since that can get time consuming and rarely turns out right. I would like to know my O2 levels at cruise and on power to meter and jet my Carter properly.

I suspect I am lean on power and cruising, especially since the carb has never been dialed in after being tuned for 5k feet. I would even consider going one jet up or down if I knew what is in there now, but I don't.

OR, if someone happens to have tuned a Carter 650 AFB at sea level, I would LOVE to know your setup! That would give me the ballpark.

4x4Poet · 12-08-2004, 06:02 PM

A/F Ratio Meter

cableguy0 · 12-08-2004, 06:13 PM

a/f ,meters are great in a perfect world but in the real world air conditions change so much you will lose every hair on your head trying to keep things optimal. read the plugs to tune it properly they will tell you about everything you need to know

Ricks69 · 12-09-2004, 10:46 AM

HI,
Innovatemotorsports.com has a wide band sensor that is more accurate that the earlier sensors that only tell you if you are near optimal a/f ratios. This one will tell you the actual air fuel ratio. They run about 350.00 dollars.

68LSS1 · 12-09-2004, 12:17 PM

Wide band O2 is definately the way to go.

**StingRay** · 12-09-2004, 12:29 PM

Yup you need a wide band or it'll be a waste of money. There are plans and kits available on line to build your own but the sensors they require are not cheap. If you are lucky some Honda Civics had the right kind of sensor and at one time at least could be found in the odd wrecking yard. Depending on where in the exhaust sytem you are placing the sensor there are heated and unheated versions. The further down line (and therefore cooler) you go the more likely you will need a heated version.

neonlarry · 12-09-2004, 04:22 PM

Build your own:
http://www.diy-wb.com/
or use a color tune and brake dyno.
http://www.aep.bigstep.com/colortune1.htm
http://www.niksula.cs.hut.fi/~mdobru...iy/10/dyno.htm
If you go AFR go WB others won't tell you much. Also Harbor Freight sells Colortune.

12-08-2004, 03:32 PM	#1
redz 1970 K5 OBS guy Join Date: Jun 2004 Location: SoCal Posts: 1,060	Anyone have a good recommendation for an 'economic' O2 monitoring setup? I really want a decent setup to monitor my exhaust and dial in my Carter AFB carb. I don't really want to go off of feel since that can get time consuming and rarely turns out right. I would like to know my O2 levels at cruise and on power to meter and jet my Carter properly. I suspect I am lean on power and cruising, especially since the carb has never been dialed in after being tuned for 5k feet. I would even consider going one jet up or down if I knew what is in there now, but I don't. OR, if someone happens to have tuned a Carter 650 AFB at sea level, I would LOVE to know your setup! That would give me the ballpark. __________________ 88 Suburban Goodies- Alpine, Auto Meter, BDS, Bilstein, B&M, BFG, Borgeson, Bushwhacker, Cowl hood, Flowmaster, Genuine Gear, Holley, Infinity, JVC, K&N, MB Wheels, MSD, Pioneer, Skyjacker, Sony, Thorley, Walker + more

12-08-2004, 06:02 PM	#2
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	A/F Ratio Meter __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.

12-08-2004, 06:13 PM	#3
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	a/f ,meters are great in a perfect world but in the real world air conditions change so much you will lose every hair on your head trying to keep things optimal. read the plugs to tune it properly they will tell you about everything you need to know __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

12-09-2004, 10:46 AM	#4
Ricks69 Registered User Join Date: Oct 2004 Location: San Diego Posts: 13	HI, Innovatemotorsports.com has a wide band sensor that is more accurate that the earlier sensors that only tell you if you are near optimal a/f ratios. This one will tell you the actual air fuel ratio. They run about 350.00 dollars. __________________ Rick 69 Longbed Project 57 Chevy 406 Four Speed

12-09-2004, 12:17 PM	#5
68LSS1 Registered User Join Date: Dec 2002 Location: Tampa Posts: 1,191	Wide band O2 is definately the way to go. __________________ '68 Short Step LS1/T56, Hydratech, Fatman Fabrications Stage III, Baer, Hot Rods to Hell, US Body, S&W, etc

12-09-2004, 12:29 PM	#6
StingRay Senior Member Join Date: Mar 2000 Location: Saskatoon,SK,Canada Posts: 2,476	Yup you need a wide band or it'll be a waste of money. There are plans and kits available on line to build your own but the sensors they require are not cheap. If you are lucky some Honda Civics had the right kind of sensor and at one time at least could be found in the odd wrecking yard. Depending on where in the exhaust sytem you are placing the sensor there are heated and unheated versions. The further down line (and therefore cooler) you go the more likely you will need a heated version. __________________ Saskatoon, Saskatchewan Canada

12-09-2004, 04:22 PM	#7
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,746	Build your own: http://www.diy-wb.com/ or use a color tune and brake dyno. http://www.aep.bigstep.com/colortune1.htm http://www.niksula.cs.hut.fi/~mdobru...iy/10/dyno.htm If you go AFR go WB others won't tell you much. Also Harbor Freight sells Colortune. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI Last edited by neonlarry; 12-09-2004 at 04:29 PM.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.