2nd Generation Specific 1986-1992 Discussion

Apex'i Super-afc

Old 03-20-2004, 10:27 PM
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I know that I need an Air:Fuel gauge to hook up to my O2 sensor. But from there what am I going to do? If I am to lean it out a little bit to get more horsepower, where on the gauge am I not going to go past? Pics and input are apprectiated.
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Old 03-20-2004, 11:07 PM
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It really depends on the gauge you use. The only real way to tune is to get a wide band. The narrow bands only can tell you if your going towards lean or towards rich, not exact.



You really gotta do it by feel. Just play with it and dont lean it out too much that you detonate.
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Old 03-21-2004, 11:28 AM
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What would be a good wide band sensor, and where could I get one?
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Old 03-21-2004, 12:09 PM
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on an na you sorta dont need one, detonation isnt a problem.



http://www.rx-7parts.com/product_info.php/...products_id/268



thats the best wideband, as an alternative you could tune the car on the dyno
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Old 03-21-2004, 01:44 PM
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So if I dont need one, do I just get an aftermarket one and use that with the o2 sensor?
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Old 03-21-2004, 02:22 PM
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Originally Posted by cps87rx7se' date='Mar 21 2004, 11:44 AM
So if I dont need one, do I just get an aftermarket one and use that with the o2 sensor?
no thats not good enough, the guages using the stock 02 sensor dont really work correctly at full load. they will read leaner the hotter they get while a wideband is temp compensated
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Old 03-21-2004, 04:57 PM
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I really dont want to spend that much right now b/c I just got the S-AFC, and that left a hole in my pocket as it was. So, by getting an A:F ratio gauge, and by the butt dyno, I can tune it with out having any problems, or am I going to risk the chance of detonation?
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Old 03-21-2004, 05:09 PM
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your butt is not calibrated for air/fuel ratios...



Spend the money now (wideband) or spend more later (new rebuild)
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Old 03-21-2004, 05:42 PM
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Is there an eaiser way to tune the S-AFC? That is what I am asking, can I use an Autometer Air:Fuel ratio gauge or do I need to get a wide band O2 sensor?
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Old 03-21-2004, 05:48 PM
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Originally Posted by cps87rx7se' date='Mar 21 2004, 03:42 PM
Is there an eaiser way to tune the S-AFC? That is what I am asking, can I use an Autometer Air:Fuel ratio gauge or do I need to get a wide band O2 sensor?
the autometer isnt good enough.
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