[Johnboy68]

Anybody ever use a wideband on their cat???? Just bought one for another car and was think of welding in a bung for it. If so what were some good readings to tune for???

Thanx

 

[mickp]

A wideband o2 read out is a great tool for setting up EFI and carbed engines.
on a carbed engine you will be able to set idle air/fuel ratio by setting the idle screws, set cruise and power ratio by changing main jets and/or power valve.

i use them the most on efi engines and they work just as well on carbed engines.
put it on......you might be surprised at the results you get for idle/cruise/power conditions.

a stock engine should have around 14.3:1 - 14.7:1 @idle
14.7:1-15.0:1 @cruise and around 13.0:1-12.0:1 @wot.

 

[AZCAT]

I have a Zeitronix Zt-2 which allows you to record/view all sorts of data. Mine is setup for air-fuel ratio, throttle position, rpm, and vacuum.

I also have a LCD display to view live data without a laptop.

a stock engine should have around 14.3:1 - 14.7:1 @idle
14.7:1-15.0:1 @cruise and around 13.0:1-12.0:1 @wot.

I shoot for the above range as well.