Best air-fuel ratio monitor?

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408 Nova
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Best air-fuel ratio monitor?

Postby 408 Nova » Sat Apr 19, 2014 11:59 am

What's the best air-fuel ratio monitor for leaded race fuel for a bracket race type car? I would love to keep the price under $400.

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Re: Best air-fuel ratio monitor?

Postby Wolfplace » Sat Apr 19, 2014 12:43 pm

408 Nova wrote:What's the best air-fuel ratio monitor for leaded race fuel for a bracket race type car? I would love to keep the price under $400.

I have found the NTK sensors seem to last longer than the Bosch
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Re: Best air-fuel ratio monitor?

Postby coolchevy » Sat Apr 19, 2014 1:24 pm

NGK AFX powerdex

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Alan Roehrich
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Re: Best air-fuel ratio monitor?

Postby Alan Roehrich » Sat Apr 19, 2014 1:31 pm

coolchevy wrote:NGK AFX powerdex



Yep.

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Re: Best air-fuel ratio monitor?

Postby 408 Nova » Sun Apr 20, 2014 1:35 am

Will lead affect the NGK any?

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Re: Best air-fuel ratio monitor?

Postby Alan Roehrich » Sun Apr 20, 2014 9:25 am

408 Nova wrote:Will lead affect the NGK any?



All of them are affected by leaded fuel. The NGK seems to last the longest.

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Re: Best air-fuel ratio monitor?

Postby wil8115 » Sun Apr 20, 2014 10:16 am

AFX for sure.

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Re: Best air-fuel ratio monitor?

Postby Ken0069 » Sun Apr 20, 2014 10:33 am

Here's that NGK system on Amazon

http://www.amazon.com/NGK-Powerdex-Air- ... B0018MUNTM

I run an Innovate LC-1 with a gauge mounted inside the car under the dash. Not sure the Innovate system is as cheap as that NGK though. Greg Kelly at Motorsports Innovations in NJ may be able to help you though and he's second to none as far as tech support is concerned!
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Re: Best air-fuel ratio monitor?

Postby cuslog » Sun Apr 20, 2014 1:54 pm

I use an Innovate LM-2 and I'm satisfied with it.
Records to an SD card. Will also record RPM thru a run (with the optional RPM cable). Displays on a graph so you can see your fuel curve through a run.
Nice to be able to review (and save) the run afterwards - not trying to watch it as you go down the track.
Uses a Bosch sensor. Innovate literature says ~25 hours run time on leaded fuel. (a lifetime in drag racing).
I run Avgas 100 low lead ~ 100 runs on my sensor - haven't killed it yet. :roll:

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Re: Best air-fuel ratio monitor?

Postby 408 Nova » Mon Apr 21, 2014 8:46 pm

Appreciate everybody giving me advice.

How much ET and speed has anyone ever tuned out of your cars using an air-fuel ratio monitor? Are they worth it?

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Re: Best air-fuel ratio monitor?

Postby novadude » Tue Apr 22, 2014 6:17 am

What features make the NGK the preferable system to use, as compared to AEM, Innovate, etc? I'm really new to A/F monitors, so please enlighten me. :)

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Re: Best air-fuel ratio monitor?

Postby bmcdaniel » Tue Apr 22, 2014 10:01 am

Innovate LC-1 here, too. You can data log and I have the analog meter mounted inside. It's a little bit easier to see trends rather than trying to read and decipher digits on the fly.

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Re: Best air-fuel ratio monitor?

Postby cuslog » Tue Apr 22, 2014 10:08 am

408 Nova wrote:Appreciate everybody giving me advice.

How much ET and speed has anyone ever tuned out of your cars using an air-fuel ratio monitor? Are they worth it?


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Before I had one, I always thought I was rich -- nope, AFR said I was lean, gave it a bunch more fuel, picked up 2 tenths.
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Re: Best air-fuel ratio monitor?

Postby Bram Stroker » Tue Apr 22, 2014 1:43 pm

I've always liked the AEM ones. I use them on several cars. Great features including multi channel / multi sensor for more accuracy in FI systems, triggering options, and so forth. Their newest failsafe style system is nice too and adds in some automated protection if that is of use in your application. Their stuff is very accurate and has never let me down.

http://www.aemelectronics.com/wideband- ... ystems-15/

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Re: Best air-fuel ratio monitor?

Postby 408 Nova » Tue Apr 22, 2014 9:24 pm

cuslog wrote:
408 Nova wrote:Appreciate everybody giving me advice.

How much ET and speed has anyone ever tuned out of your cars using an air-fuel ratio monitor? Are they worth it?


Roots blown BBC
Reading spark plugs is a black art to me.
Before I had one, I always thought I was rich -- nope, AFR said I was lean, gave it a bunch more fuel, picked up 2 tenths.
Best tuning tool I have.


I am at a loss on reading plugs also.

No matter what jetting change I make on my carb, the ETs stay the same. I was at the drag strip the other day and was going to put an 88 in the secondaries. My son was helping me, and, unbeknownst to me, he handed me a 98 on accident. The speed and ET didn't change. I didn't notice the mistake until the next jet change.

I bought the Daytona Sensors WEGO III single channel air-fuel ratio monitor with data logging.

I am very curious to see where my air-fuel ratio stands. I'm hoping to pick up at least a tenth!


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