I need to find out air/fuel numbers, so I wonder about following:

1) Which ones I am interested in: before air/fuel mixture enters engine, ones from exhaust, or both? What are pros and cons of each method?

2) Ones from exhaust I can read out through probe or using wideband sensor installed in exhaust. How I can read out ones before engine? Are there any ports on a truck that allow for hooking up of hardware/software that would read out these in real time?

Thanks in advance!

ZoranC

 

The only air/fuel I know about is in the exhaust.
When on a dyno the air/fuel ratio should be no more that 12.5:1. There are some tuners out there that will go no more than 11.5-12:1. I am talking about a engine that is supercharged under "load".
The perfect air/fuel ratio when at idle is 14.7:1.

 

Thanks!

What is being read out by air/fuel gauge though? What is truck's computer reading out? And is there a way to read out this numbers while moving down a freeway?

Thanks again!

ZoranC

 

the air/fuel guages will read the air/fuel ratio as you are driving

 

You need a wide band hooked into a bung on your header or replace an O2 sensor with the wide band monitor (I have heard this method is worse due to eliminating the O2 sensor). That will allow you to read your A/F ratios while driving down the road. A gauge will just give you a light display......the wide band will give you exact numbers.

--Joe

 

Check out www.techedge.com.au. The make the best less expensive wide band meter on the market. It uses a 5 wire wide-band O2 sensor that is located in the exhaust.
This meter is comperable the the $1200 Lamda meters used on chassis dynos for a fraction of the price. It also uses the 12 volt vehicle power. So you can install it and see what the air/fuel is when driving down the road.

 

I think Anderson Motorsports sells a $500 meter. If you try the link above, remove the "." at the end. Here is the correct link.
http://www.techedge.com.au

 

Yeah, but they will be reading it from where ?

Thanks!

ZoranC

 

Hey, I like that! Why they put them in exhaust though?

And what air and/or fuel info is being read out by truck's computer and would I benefit in any way from getting it?

Thanks again!

ZoranC

 

Thank you! $500 is not small money, so I will not do it immediately, but I am VERY tempted to do it little later

Thanks again!

ZoranC

 

where in L.A. are you? Theres a muffler shop on crenshaw I think its called speedway and have them weld you a bung. Then go up the street to swanson to measure A/F ratio.

 

Thank you for a hookup! It definitely goes on my 'must have' mod list.

Thanks again! ZoranC

 

Z28KLR, I just noticed: We are both in San Pedro. Maybe we should hook up and exchange experiences. e-mail me if you want to.

ZoranC