FAST A/F meter
Thread Starter
Racer
Joined: Nov 2006
Posts: 379
Likes: 7
FAST A/F meter
Hi, I have one of these FAST A/F meters
http://www.summitracing.com/parts/fst-170402
I am planning to install it in my 1987 C4 when I get my new exhaust in a little while.
The FAST manual says that the A/F meter is capable of simulating a narrowband O2 signal for older cars.
This made me wonder if it would be a good idea to connect the FAST A/F meter instead of the standard O2 sensor? (will the 1987 ECU accept the signal from the FAST unit)
http://www.summitracing.com/parts/fst-170402
I am planning to install it in my 1987 C4 when I get my new exhaust in a little while.
The FAST manual says that the A/F meter is capable of simulating a narrowband O2 signal for older cars.
This made me wonder if it would be a good idea to connect the FAST A/F meter instead of the standard O2 sensor? (will the 1987 ECU accept the signal from the FAST unit)
Burning Brakes
Joined: Mar 1999
Posts: 876
Likes: 9
From: Mooresville NC
That is precisely why many of the widebands have 2 analog outputs, so you can program 1 to simulate a narrow band and connect it to the stock wiring and use the 2nd to connect to your data logger, gauge or aftermarket ECU.
Thread Starter
Racer
Joined: Nov 2006
Posts: 379
Likes: 7
would this give the give the stock ECU a more precise reading or is the only advantage that I don't have to install three bungs in the exhaust?
Last edited by Ronaldo; Mar 15, 2013 at 10:09 AM.
Burning Brakes
Joined: Mar 1999
Posts: 876
Likes: 9
From: Mooresville NC
It really wouldn't give the ECU anything more precise to work with, the basic Narrowband sensors are pretty accurate for stoich, but you can reprogram the cross over points to make the stock ECU target slightly richer or leaner if you wanted to.
