[meister@steeda.ca]

1turbofocus,Dec 20 2004, 04:50 AM Wrote:

meister@steeda.ca,Dec 15 2004, 09:45 PM Wrote:etc with true wideband A/F meters....none of this tail pipe garbage

Why do you make such FOOLISH statements ,Makes you almost sound like you dont know what your talking about at times

What is wrong with testing the AF at the tail pipe, before we had the better AF wide band heated o2 we tunered 1000`s of high HP (400 to 1100) cars and most are still running today

Before i went to an onboard o2 my 440HP Focus and many other WERE done at the tail pipe , MANY well known tuners as well as my self still do this

I have tested over 20 wide band heated o2 sensors both in the tail pipe and in a bung welded in and in the #2 o2 hole we havent seen more than a .2 differance from the worst to the best

So maybe in your wise words of wisdom you can tell me what is garbage about it ?

And how many Focus Turbocharged have you datalogged ?

Tom
[right][snapback]75498[/snapback][/right]

Tom, it is a proven fact that readings from the tailpipe are skewed because of the cat's and free air readings. There will be less issues of free air being read at WOT, but the air being read will throw off your fuel trims in open and not allow you to dial in the vehicle.

There is nothing wrong with using a tailpipe sniffer if that is your only way for reading A/F, but a wideband 02 sensor before the cats is the best and most accurate method. It has also been proven a wideband 02 sensor after the cats is even more accurate than a tail pipe sniffer.

If you try to claim a tail pipe sniffer is as good as a true wideband 02, you are fooling your self and your customers.