Air/Fuel Ratio Gauge, Anyone using one? |
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Air/Fuel Ratio Gauge, Anyone using one? |
race914 |
Nov 20 2006, 06:01 PM
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#1
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73 914-4 Group: Members Posts: 1,006 Joined: 31-October 05 From: Nipomo, California (Central Coast) Member No.: 5,027 Region Association: Central California |
A little background. I bought my motor used and besides not knowing how well it was tuned to start with, I changed out the 4 into 1 headers with a set of Chris Foley's 4-2-1s.. Sometimes I get pops & flames out the exhaust on decel so I'd like to see if my Webers are jetted right.
I don't have easy access to a chassis dyno and am considering a wideband Air/Fuel Ratio Gauge so I can log and monitor the data at the track. Again, I'm curious how my normal AFR is with just my Phase 9 (sometimes I'm getting pops & flames out the exhaust on decel) and also what happens to my AFR when I add my supertrapp onto the Phase 9 for <=90db tracks, etc. (This usually eliminates the pops & flames) I could make a long tow to a chassis dyno somewhere but I'm thinking the gauge might be more helpful longterm to have ongoing access to the data.. Anyone use one of these? (IMG:http://www.autometer.com/img/products/4378_d.jpg) AutoMeter or one of these? (IMG:http://shop.airfuelratio.com/images/product_1_zm.jpg) NGK I know there are lots of other brands out there too (AEM, etc.) Anyone get good enough data for tuning purposes? Or should I just go find a chassis dyno? Thanks in advance for any feedback on your experiences |
Brett W |
Nov 20 2006, 08:42 PM
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#2
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Advanced Member Group: Members Posts: 2,856 Joined: 17-September 03 From: huntsville, al Member No.: 1,169 Region Association: None |
If this is a race car, read your spark plugs. I think once a car is tuned reading your afrs can just distract you. You will spend lots of time wondering why you are getting funny readings at different throttle positions. With out a way to determine throttle position and MAP readings I doubt you will gain much by having an AFR meter by itself.
Narrow band gauges are nothing more than a pretty light show. They don't tell you anything useful. |
race914 |
Nov 20 2006, 08:59 PM
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#3
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73 914-4 Group: Members Posts: 1,006 Joined: 31-October 05 From: Nipomo, California (Central Coast) Member No.: 5,027 Region Association: Central California |
Hi Brett,
I agree that the narrow band AFR gauges don't help with tuning. I guess they are just 'binary' and show 'lean' or 'rich'. The one I saw looked schitzophrenic. Greg If this is a race car, read your spark plugs. I think once a car is tuned reading your afrs can just distract you. You will spend lots of time wondering why you are getting funny readings at different throttle positions. With out a way to determine throttle position and MAP readings I doubt you will gain much by having an AFR meter by itself. Narrow band gauges are nothing more than a pretty light show. They don't tell you anything useful. |
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