WB O2 controller necessary with MSII?
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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lemans70sport
- MegaSquirt Newbie
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WB O2 controller necessary with MSII?
After reading the manual several times and researching posts in the forums, I'm still confused over the need for a wide band controller. I have an Innovate LC-1 that has stopped communicating and am wondering if I needed it in the first place. I'm running E85 and haven't got past getting the engine to idle yet.
1970 Pontiac LeMans 400 cu in/400 trans turbo charged
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Bernard Fife
- Master Squirter
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Re: WB O2 controller necessary with MSII?
lm70sprt,
You don't *need* it, that is MegaSquirt will work without it. How comfortable you will be without one depends mostly on how much tuning knowledge and experience you have. Remember that in the old days (before about 10 years ago), NOBODY used a wide band sensor, and yet some very high horsepower engines were successfully tuned and run hard without burning up.
I never use a wide band for tuning (for a number of reasons). However, I do like having one on the car to let me know if anything in the fuel system is changing (and thus needs fixing).
People who haven't tuned much often like to have a wide band to get them 'in the ball park'. That's fine, but they should be aware of the limitations:
- the wide band isn't as accurate or fast as many companies claim, and
- if you don't have a lot of tuning experience, you don't necessarily know what AFR to tune for anyhow. There are rules of thumb for this, but they are unlikely to be the optimum values for *your* particular engine.
Lance.
You don't *need* it, that is MegaSquirt will work without it. How comfortable you will be without one depends mostly on how much tuning knowledge and experience you have. Remember that in the old days (before about 10 years ago), NOBODY used a wide band sensor, and yet some very high horsepower engines were successfully tuned and run hard without burning up.
I never use a wide band for tuning (for a number of reasons). However, I do like having one on the car to let me know if anything in the fuel system is changing (and thus needs fixing).
People who haven't tuned much often like to have a wide band to get them 'in the ball park'. That's fine, but they should be aware of the limitations:
- the wide band isn't as accurate or fast as many companies claim, and
- if you don't have a lot of tuning experience, you don't necessarily know what AFR to tune for anyhow. There are rules of thumb for this, but they are unlikely to be the optimum values for *your* particular engine.
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw
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lemans70sport
- MegaSquirt Newbie
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- Location: Kalamazoo, MI
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Re: WB O2 controller necessary with MSII?
Lance,
Thanks for the reply but I didn't phrase my question properly. I still want to use my wide band O2 sensor and am wondering if I can wire it directly to MSII without going through a controller. Can I still see my Air/fuel ratio when tuning?
Thanks for the reply but I didn't phrase my question properly. I still want to use my wide band O2 sensor and am wondering if I can wire it directly to MSII without going through a controller. Can I still see my Air/fuel ratio when tuning?
1970 Pontiac LeMans 400 cu in/400 trans turbo charged
Re: WB O2 controller necessary with MSII?
Don't think a wideband sensor will work direct with an MSII. They work on a different principle from a narrowband one.lemans70sport wrote:Lance,
Thanks for the reply but I didn't phrase my question properly. I still want to use my wide band O2 sensor and am wondering if I can wire it directly to MSII without going through a controller. Can I still see my Air/fuel ratio when tuning?
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
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Bernard Fife
- Master Squirter
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- Joined: Thu Oct 29, 2009 12:54 pm
Re: WB O2 controller necessary with MSII?
lemans70sport,
Dave is right, you must have a controller. The WB controller is 'active' (feeding a current to balance different parts of the WB sensor - the AFR is related to the current required. A narrow band sensor is passive (it sends a signal without any electronics). For more info on how a wide band controller works, see: http://www.megamanual.com/PWC/LSU4.htm
Lance.
Dave is right, you must have a controller. The WB controller is 'active' (feeding a current to balance different parts of the WB sensor - the AFR is related to the current required. A narrow band sensor is passive (it sends a signal without any electronics). For more info on how a wide band controller works, see: http://www.megamanual.com/PWC/LSU4.htm
Lance.
"Never wrestle with pigs. You both get dirty and the pig likes it.” - George Bernard Shaw
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lemans70sport
- MegaSquirt Newbie
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- Joined: Tue Sep 28, 2004 6:54 am
- Location: Kalamazoo, MI
- Contact:
Re: WB O2 controller necessary with MSII?
Got it. Thanks for the replies.
1970 Pontiac LeMans 400 cu in/400 trans turbo charged