Air/fuel reading

[Nytroshocker]

I have a 2003 rx1 with a mc express turbo on it.Wandering what the wideband gauge should be reading at full throttle.I live in Iowa and it has 132.5 jets in it and running 9lbs of boost.Also can I run pump gas.thanks for the help.

 

[Nytroshocker]

And it has the head shim.

 

[Bamboozler]

You'll probably get a varied opinion based off of individual experience. My experience says the following, take it as an opinion:

11.0-11.5: Very safe, looking to lean to optimize
11.5-11.8: Safe, sweet spot for optimized performance without sweating detonation
11.8-12.2: Most likely safe, good power potential, threats of detonation in the back of the mind
12.2+: Looking to add fuel, good power potential, starting to play with fire

I've read about people tuning up to 12.5s and pull the best power out of their applications but that's raged edge IMHO. If you're in it to win it fine, if you're looking for motor longevity not so much (IMO).

 

[dirk_03]

afr's

You'll probably get a varied opinion based off of individual experience. My experience says the following, take it as an opinion:

11.0-11.5: Very safe, looking to lean to optimize
11.5-11.8: Safe, sweet spot for optimized performance without sweating detonation
11.8-12.2: Most likely safe, good power potential, threats of detonation in the back of the mind
12.2+: Looking to add fuel, good power potential, starting to play with fire

I've read about people tuning up to 12.5s and pull the best power out of their applications but that's raged edge IMHO. If you're in it to win it fine, if you're looking for motor longevity not so much (IMO).

I think that those numbers are about right on for full boost afr's I would run a little leaner for cruising(low boost) and mid range. When the boost is up though make it rich. It will run being VERY VERY rich but it runs much better being leaner, Keep it lean and mean. It will save gas and give the best driveability.

I would shoot for 13.1-13.5 for off idle 12.5-12.8 for mid range and 11.7-12.1 for full boost.

 

[rxrider]

11.8-12.0 10 lbs and up

idle 14.5
engagement 13.5
0 lbs 13.0
5 lbs 12.5
10 lbs and over 11.8-12.0

 

[rxrider]

Nytroshocker - please add your location to your user profile, it's a site requirement

 

[Nytroshocker]

Wide band reading

I replace the whole lc1 and sensor except for the guage and it still reads 7.5 what could be wrong?

 

[tapex_07]

O2 sensor could be bad. I've heard of a few bad out of the box. Double check your connections and make sure its calibrated correctly.

 

[rxrider]

My guess is that you're not measuring gasoline, but methanol. Check with the user manual how to set type of fuel.

The gauge controls what you're LC1 is reading.
- Nitromethane
- Methanol
- Ethanol
- Gasoline
- Diesel

 

[FLYBYU]

My guess is that you're not measuring gasoline, but methanol. Check with the user manual how to set type of fuel.

The gauge controls what you're LC1 is reading.
- Nitromethane
- Methanol
- Ethanol
- Gasoline
- Diesel

If the sensor was bad it would go the other way into the 20's. I had the power away from mine for a couple weeks and had to reprogram it to the right fuel

 

[Nytroshocker]

How do I set it to gasoline?

 

[jhlarsen]

How do I set it to gasoline?

Read this:http://www.innovatemotorsports.com/support/manual/LC-1_Manual.pdf

 

[rxrider]

It's all in there

 

[insane]

What should your AFR on the top be if you are running water/meth on a s/c? I am running between 13 and 20 psi for boost.

 

[rxrider]

About 11.8-12.0 IMO, any richer than 11.7 and you will have ignition misfire.