O2 or EGT ?

Joe Marcinowski · 12-11-2007, 06:51 PM

Looking for some input. Which one, what brand, and why?
Thanks.

Alan Roehrich · 12-11-2007, 07:54 PM

If you JUST want either an O2 sensor OR an EGT, get the AFX O2 unit from NGK. Inexpensive, simple, accurate, and reliable. An EGT unit is hard to tune with unless you're real sharp. There's nothing WRONG with tuning by EGT, IF you have a handle on it.

Joe Marcinowski · 12-20-2007, 07:01 PM

No one else with an opinion? Alan, are you saying its best to have both? Looking to weld fittings in before my headers go out to get coated.
Thanks, Joe

LNorton · 12-20-2007, 07:32 PM

Joe, I would go with an O2 sensor setup only. It is the only true way to see the Air/Fuel Ratio.

Alan Roehrich · 12-20-2007, 08:24 PM

Quote:

Originally Posted by montys 55

I installed an autometer o2sensor in the collector as per the instructions an I get super lean readings 18-1.
Instructions on ngk website state sensor must be installed 10x the dia of the collector from the end of the collector. 3 1/2 x 10=35". anybody else have a problem.

No, we do not have that problem, and we've run the AFX setup for a year and a half. Almost any O2 sensor system will have those same instructions. What it means is that on a race car, unless you have a system on the car after the collectors, you'll get lean readings at idle and low RPM. When it's going down the track, it'll read just fine. At idle, the O2 readings are useless.

Moparteacher · 12-20-2007, 10:17 PM

I'm not familiar with what's available on the market, but I will say that you'll want a wide band O2 and a heated one at that. You'll also want to avoid any exhaust leaks before the O2. A secure ground for the header will also be required. Too close to the engine and it'll burn up, too close to the end of the collector and it'll read O2 between pulses.

Alan Roehrich · 12-20-2007, 08:20 PM

Quote:

Originally Posted by Joe Marcinowski

No one else with an opinion? Alan, are you saying its best to have both? Looking to weld fittings in before my headers go out to get coated.
Thanks, Joe

Joe, I'm saying that it is best to use AFR for ease of use. EGT has its place, but it is a lot more difficult to use for any number of reasons. You don't have to have an EGT setup, but I'd hate to have to do without an AFR setup.

Send your headers to NitroPlate, the best coating there is, and the only coating done by a company that not only services sportsman racers, but they ARE sportsman racers.

12-11-2007, 06:51 PM	#1
Joe Marcinowski Member Join Date: Nov 2005 Location: Northern Ohio Posts: 203 Likes: 835 Liked 33 Times in 15 Posts	O2 or EGT ? Looking for some input. Which one, what brand, and why? Thanks. __________________ Joe Marcinowski 3377 STK

12-11-2007, 07:54 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,098 Likes: 1,546 Liked 1,777 Times in 404 Posts	Re: O2 or EGT ? If you JUST want either an O2 sensor OR an EGT, get the AFX O2 unit from NGK. Inexpensive, simple, accurate, and reliable. An EGT unit is hard to tune with unless you're real sharp. There's nothing WRONG with tuning by EGT, IF you have a handle on it. __________________ Alan Roehrich 212A G/S

12-20-2007, 07:01 PM	#3
Joe Marcinowski Member Join Date: Nov 2005 Location: Northern Ohio Posts: 203 Likes: 835 Liked 33 Times in 15 Posts	Re: O2 or EGT ? No one else with an opinion? Alan, are you saying its best to have both? Looking to weld fittings in before my headers go out to get coated. Thanks, Joe __________________ Joe Marcinowski 3377 STK

12-20-2007, 07:32 PM	#4
LNorton Senior Member Join Date: Apr 2004 Location: RacerTees.com Posts: 505 Likes: 0 Liked 4 Times in 2 Posts	Re: O2 or EGT ? Joe, I would go with an O2 sensor setup only. It is the only true way to see the Air/Fuel Ratio. __________________ Lee Norton - N229 STK IHRA H/FIA - NHRA O/SA RacerTees.com

12-20-2007, 10:17 PM	#6
Moparteacher Junior Member Join Date: Nov 2007 Location: Boise Posts: 49 Likes: 0 Liked 0 Times in 0 Posts	Re: O2 or EGT ? I'm not familiar with what's available on the market, but I will say that you'll want a wide band O2 and a heated one at that. You'll also want to avoid any exhaust leaks before the O2. A secure ground for the header will also be required. Too close to the engine and it'll burn up, too close to the end of the collector and it'll read O2 between pulses. __________________ Gary Weaver Moparteacher@yahoo.com