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2000 GT tuning help



How come people say you can read the air fuel ratio through the o2 sensor with the aeroforce interceptor? People say 920 to 930 and zzp told me low to mid 900's and I'm good anything below 900 and it's to lean?
 
The interceptor gauge reads what the PCM reads which is in Millivolts. A wideband has it's own controller, and readout so that you can see what your actual AFR is. Different brand O2 sensors will most of the time read different outputs. Which is why if you have a wideband that's a good calibrated setup, will tell you where you're at.
 


Reptile said:
The interceptor gauge reads what the PCM reads which is in Millivolts. A wideband has it's own controller, and readout so that you can see what your actual AFR is. Different brand O2 sensors will most of the time read different outputs. Which is why if you have a wideband that's a good calibrated setup, will tell you where you're at.
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Okay I have a oem ac delco o2 sensor would that be about the most accurate? My car runs at about 920 to 930 exactly where everyone says I should on a zzp tune. Should I buy a wideband? Just wondering if it's really necessary for being supercharged.
 
900mv could be 11.5 afr on one car but 12.0 afr on another. Or it could be 930 for 11.5 but 11.0 on another car.

They aren't accurate, they aren't a reliable source for real air to fuel ratio.
 
Its has to be close though right? Why isn't it as accurate doesn't make sense. Why would people say low to mid 900's and I'm good then?
 


Tonkin2000GT said:
Not really when everyone tells you something different....
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It's because those people don't have ther own tuning software and have likely never used a wideband.

I've seen guys with $60,000 caddys ask why they should need a wideband sensor after they have already dropped another 5 grand in mods on the car. Like it never even dawned on them that they needed to watch this kinda stuff when you are making 700whp.
 
Fivefingerdeathpunch said:
It's because those people don't have ther own tuning software and have likely never used a wideband.

I've seen guys with $60,000 caddys ask why they should need a wideband sensor after they have already dropped another 5 grand in mods on the car. Like it never even dawned on them that they needed to watch this kinda stuff when you are making 700whp.
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ZZP is one of the people that has told me this.
 
The issue is I don't have a tuner anyways the car runs good but wondering how much better it can run with a good tune....
 


What's a good air fuel ratio with a wideband? What's the best wideband to buy? I have dual aeroforce interceptor gauges a auto meter sport comp ll boost/vacuum gauge and a oil pressure gauge now any ideas?
 
The general rule of thumb is 11.5 as a target AFR for turbo/supercharged cars.

You can start there and work around it if you had too. Some vehicles require a 11.0 to run problem free and some can go leaner to 11.8 or whatever and still be fine.

Any of the gauges that most of us buy are $150-200 dollars. I've ran two AEM gauges and hard no complaints. Innovate LC1 is a gauge, autometer makes one.
 
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