a/f ratio conversion?

Reply Subscribe

Thread Tools

Search this Thread

Sep 21, 2009 | 01:11 PM

lsxmalibu

Thread Starter

TECH Enthusiast

iTrader: (50)

Joined: Mar 2008

Posts: 715

Likes: 2

a/f ratio conversion?

I have a digital a/f gauge and was wondering if there is a chart that shows voltage to wide band numbers?

Sep 22, 2009 | 04:28 AM

dsmlights

Teching In

Joined: Dec 2007

Posts: 1

Likes: 0

what type of gauge. most of them have a manual and shows the voltage for the a/f most of these gauges run from 0-5v

Sep 22, 2009 | 07:11 AM

lsxmalibu

Thread Starter

TECH Enthusiast

iTrader: (50)

Joined: Mar 2008

Posts: 715

Likes: 2

I have two, a 0 to 1 volt gauge and DynoTune A/F Ratio lean switch, Im at
.870 on the bottle and was trying to see what that is for a/f

Sep 22, 2009 | 07:21 AM

SweetS10V8

12 Second Club

iTrader: (4)

Joined: Jun 2004

Posts: 2,580

Likes: 3

From: Michigan

Is it a wide band???

870mv sounds like a narrow band and you wont be able to convert because narrow bands aren't accurate except for a small range around 14.7:1

Sep 22, 2009 | 08:43 AM

lsxmalibu

Thread Starter

TECH Enthusiast

iTrader: (50)

Joined: Mar 2008

Posts: 715

Likes: 2

stock narrowband. I thought I saw a chart once that showed approx a/f ratio to mv's. like 14.7 was 450 mv's

Last edited by lsxmalibu; Sep 22, 2009 at 08:54 AM.

Sep 22, 2009 | 11:07 AM

Frost

FormerVendor

iTrader: (45)

Joined: Jul 2005

Posts: 5,913

Likes: 2

From: Richmond VA

Quote:

Originally Posted by lsxmalibu

stock narrowband. I thought I saw a chart once that showed approx a/f ratio to mv's. like 14.7 was 450 mv's

There may be a chart, but it's garbage.

You cannot accurately measure much of anything away from stoich with a narrowband sensor. That 'gauge' is just a lights show.

Sep 22, 2009 | 12:01 PM

BuffJoeyD

TECH Regular

iTrader: (2)

Joined: Feb 2004

Posts: 426

Likes: 0

From: 1985

I get tired of all the people with narrow band gauges running - They are for the Stock PCM to try and contol fueling, not for an AF ratio. 450 is close to Stoich when the sensor is in the fqactory original location in the stock manifold- anything above that is richer

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Sep 22, 2009 | 12:24 PM

Frost

FormerVendor

iTrader: (45)

Joined: Jul 2005

Posts: 5,913

Likes: 2

From: Richmond VA

It IS off... That narrowband will report (significantly) different voltages for the SAME AFR as it's temperature varies (among other things)... Merely moving it's placement in the exhaust will change it's reading as well.

Sep 22, 2009 | 12:41 PM

#10

lsxmalibu

Thread Starter

TECH Enthusiast

iTrader: (50)

Joined: Mar 2008

Posts: 715

Likes: 2

10-4 ....

Reply Subscribe

a/f ratio conversion?

a/f ratio conversion?

Trending Topics

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die