Question about afr's lambda and wideband sensor - LotusTalk

Stale_Hotdog · 09-26-2008, 02:56 PM

What are normal afr's for a lotus with forced induction?

robains · 09-26-2008, 03:08 PM

I've not heard of Zeitronix?? Got a web site? NGK and Bosch seem popular wideband sensors. Did you calibrate it? Is it hooked up to anything that data logs so you can review?

11.5 - 12.5

Hopefully Kris or Phil and/or others with a lot of experience will chime in.

Solo2Elise · 09-26-2008, 03:24 PM

It's normal that it jumps all over when you step/release gas pedal.

Stale_Hotdog · 09-26-2008, 05:58 PM

Wide Band Air Fuel Ratio Meter is where I purchased it from. I saw two members who used this setup however one is on a turbo car and the other was on an evo. Calibrate it? I don't see that in the instructions.

robains · 10-02-2008, 10:14 PM

The one I have (which I believe is the same as TurboPhil) NGK wideband has a button on the display box to calibrate. basically hold the sensor up in the air, hit the button and wait for Cali to complete.

slaughtr · 10-03-2008, 06:04 AM

I'd also like to see a brief turorial. I know it's going to go up and down under different loads, but it would be nice to hear a concise opinion. Timing tips would also be appreciated.

Kris or Phil?

kverges · 10-03-2008, 07:07 AM

I have used the Innovate WBO2 products for years now - I use an LM-1 for temporary use in tuing and an LC-1 for permanent installs. There are many gauge options, search around. Given the affordable cost of WBO2 sensors, they really are a must for tuning and a decent idea for permanent use, just like oil pressure and water temp. Innovate is the best-supported WBO2 maker out there, it seems to me, and the units can be modified, via software, to output an analog signal as a function of lambda in most any shape you like.

As for A/F ratio, I like to see no more than 12:1 for forced induction, for safety I tune my car to run 11-11.5:1 under boost. At cruise and part throttle (closed loop) you will see 14.7:1 and be wary of trying to mess with that, as you will be fighting a stock computer's algorithm designed to adjust fuel injector duty cycle to achieve that number under closed loop.

slaughtr · 10-03-2008, 07:16 AM

Quote:

Originally Posted by kverges

I have used the Innovate WBO2 products for years now - I use an LM-1 for temporary use in tuing and an LC-1 for permanent installs. There are many gauge options, search around. Given the affordable cost of WBO2 sensors, they really are a must for tuning and a decent idea for permanent use, just like oil pressure and water temp. Innovate is the best-supported WBO2 maker out there, it seems to me, and the units can be modified, via software, to output an analog signal as a function of lambda in most any shape you like.

As for A/F ratio, I like to see no more than 12:1 for forced induction, for safety I tune my car to run 11-11.5:1 under boost. At cruise and part throttle (closed loop) you will see 14.7:1 and be wary of trying to mess with that, as you will be fighting a stock computer's algorithm designed to adjust fuel injector duty cycle to achieve that number under closed loop.

Excellent, thanks. I just bought an LC-1 and gauge package to be installed next week.

09-26-2008, 02:56 PM	#1 (permalink)
Stale_Hotdog DENNAB Join Date: Aug 2004 Posts: 442	Question about afr's lambda and wideband sensor What are normal afr's for a lotus with forced induction? Last edited by Stale_Hotdog : 09-28-2008 at 03:15 PM.

09-26-2008, 03:08 PM	#2 (permalink)
robains 2007 Exige S Join Date: Jul 2007 Location: CA, Bay Area Posts: 1,920	I've not heard of Zeitronix?? Got a web site? NGK and Bosch seem popular wideband sensors. Did you calibrate it? Is it hooked up to anything that data logs so you can review? 11.5 - 12.5 Hopefully Kris or Phil and/or others with a lot of experience will chime in. __________________ "For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan

10-02-2008, 10:14 PM	#5 (permalink)
robains 2007 Exige S Join Date: Jul 2007 Location: CA, Bay Area Posts: 1,920	The one I have (which I believe is the same as TurboPhil) NGK wideband has a button on the display box to calibrate. basically hold the sensor up in the air, hit the button and wait for Cali to complete. __________________ "For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan

10-03-2008, 06:04 AM	#6 (permalink)
slaughtr Big head man Join Date: Aug 2005 Location: Boise, Idaho Posts: 5,957 Images: 3	I'd also like to see a brief turorial. I know it's going to go up and down under different loads, but it would be nice to hear a concise opinion. Timing tips would also be appreciated. Kris or Phil? __________________ My car both sucks and blows. Now with added all natural smoky goodness!

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09-26-2008, 03:24 PM	#3 (permalink)
Solo2Elise Registered User Join Date: Nov 2003 Location: San Jose, CA Posts: 435 Images: 17	It's normal that it jumps all over when you step/release gas pedal.

09-26-2008, 05:58 PM	#4 (permalink)
Stale_Hotdog DENNAB Join Date: Aug 2004 Posts: 442	Wide Band Air Fuel Ratio Meter is where I purchased it from. I saw two members who used this setup however one is on a turbo car and the other was on an evo. Calibrate it? I don't see that in the instructions.

10-03-2008, 07:07 AM	#7 (permalink)
kverges Registered User Join Date: Feb 2005 Location: Dallas Posts: 989	I have used the Innovate WBO2 products for years now - I use an LM-1 for temporary use in tuing and an LC-1 for permanent installs. There are many gauge options, search around. Given the affordable cost of WBO2 sensors, they really are a must for tuning and a decent idea for permanent use, just like oil pressure and water temp. Innovate is the best-supported WBO2 maker out there, it seems to me, and the units can be modified, via software, to output an analog signal as a function of lambda in most any shape you like. As for A/F ratio, I like to see no more than 12:1 for forced induction, for safety I tune my car to run 11-11.5:1 under boost. At cruise and part throttle (closed loop) you will see 14.7:1 and be wary of trying to mess with that, as you will be fighting a stock computer's algorithm designed to adjust fuel injector duty cycle to achieve that number under closed loop.

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