Anyone using one to help tune their carb ect. Summit and Jegs sell a few diff ones and i was curious if people use them alot and if they help much..TIA..Sean
Air Fuel Meter?
sonk
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6,401 Posts
I'm using the Autometer it get's you in the ballpark but it's a narrow band, what you want is the wide band. It's more $$ though.
http://www.innovatemotorsports.com/products/lm1.php
http://www.innovatemotorsports.com/products/lm1.php
I have the one sensor .....for my motor seems to be fine I have a bung in both collectors so did move it over to compare .....not much diff .....IMHO one is enough for the average tuner with street strip NA motor
I use the LM-1 in a supercharged EFI car it is good too
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3,604 Posts
Wide band all the way...
Many of the "gauge" systems are narrow band and much less accurate and much less useful. The narrow band sensor is optimized around the 14.7 stochiometric AFR. Get outside that, like when tuning for power AFR ratios around 12.5, and the sensor just does not read very well. So you want to stay away from simple LED indicators and head towards digital number readouts.
I have been running the Tech Edge 2B0 with a digital display for over a year. I have it and a vacuum gauge velcroed to the transmission hump. This basic setup will show you a lot, but you do have to learn not to fixate on it (gotta keep watching the road!). I have added RPM and MAP sensor inputs and used the computer logging functions as well. Putting a laptop on the floor is not a big deal to me, so I have never used the internal logging feature.
A single O2 sensor is adequate for most applications. If you think about it, each side of the carb typically feeds 2 cylinders on each side. So you will be reading both streams. I can tell when the mixture screws are in sync with the WB because the AFR numbers stabilize and stop bouncing around so much.
The Innovate products look nice and are more simplified. You just buy your unit and *all* the accessories from Innovate, plug them in, and go.
The Tech Edge products are a lot more home brewed, shoot they even sell products as kits you assemble yourself. They document all the interfaces and allow you to figure out what you want to connect and how to use it. They are pretty good about answering "how to" questions. For example I am using an EFI MAP sensor and they provided a circuit diagram for a 5V power supply to feed the sensor.
Many of the "gauge" systems are narrow band and much less accurate and much less useful. The narrow band sensor is optimized around the 14.7 stochiometric AFR. Get outside that, like when tuning for power AFR ratios around 12.5, and the sensor just does not read very well. So you want to stay away from simple LED indicators and head towards digital number readouts.
I have been running the Tech Edge 2B0 with a digital display for over a year. I have it and a vacuum gauge velcroed to the transmission hump. This basic setup will show you a lot, but you do have to learn not to fixate on it (gotta keep watching the road!). I have added RPM and MAP sensor inputs and used the computer logging functions as well. Putting a laptop on the floor is not a big deal to me, so I have never used the internal logging feature.
A single O2 sensor is adequate for most applications. If you think about it, each side of the carb typically feeds 2 cylinders on each side. So you will be reading both streams. I can tell when the mixture screws are in sync with the WB because the AFR numbers stabilize and stop bouncing around so much.
The Innovate products look nice and are more simplified. You just buy your unit and *all* the accessories from Innovate, plug them in, and go.
The Tech Edge products are a lot more home brewed, shoot they even sell products as kits you assemble yourself. They document all the interfaces and allow you to figure out what you want to connect and how to use it. They are pretty good about answering "how to" questions. For example I am using an EFI MAP sensor and they provided a circuit diagram for a 5V power supply to feed the sensor.
sonk : dont wate your money for narrow band
wideband uses 5v...and has a ability use wide range of afr..
i was tuning my friends subaru sti ecu ...sti uses narrowband and can read afr as low as 12.1:1...but on the wide band it is not correct ..
buy a wide band xxx brand...diffference between brands ara reaction times depends on throthle position (based on my experience)
i use aem wb fixed in the car and lm1 for tuning with diffrent cars
my 2 cent
regards
sami
wideband uses 5v...and has a ability use wide range of afr..
i was tuning my friends subaru sti ecu ...sti uses narrowband and can read afr as low as 12.1:1...but on the wide band it is not correct ..
buy a wide band xxx brand...diffference between brands ara reaction times depends on throthle position (based on my experience)
i use aem wb fixed in the car and lm1 for tuning with diffrent cars
my 2 cent
regards
sami
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1,128 Posts
Trying to decide between the FAST unit and the LM-1. Does the FAST have external data recoding (RPM, MAP) capability?
Mike
Mike
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1,128 Posts
Anybody have an opinion on differences between th FAST unit and the LM-1?
i use an lm-1 because of the blow thru superchargers, and using a carb.-when i put one on a chassis dyno, i hooked up my lm-1 to compare with dyno reading(i got it close on the street with the lm-1) i was suprised the lm-1 was almost the exact reading as the chassis dyno reading
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11,147 Posts
Here is another site for the Wide Band O2 sensor/computer. These guys build GOOD product and it is less expensive than the LM1 and others.
http://www.fjoracing.com/
http://www.fjoracing.com/
Thanks for the link, I think I will be ordering one of them. How is life in Fort Mac?
Cheers
Bear
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