New invention. Permenant wideband guys please read.
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New invention. Permenant wideband guys please read.
In the last few months I have developed a circuit that works in conjunction with a permenantly installed wideband O2 sensor. This circuit was designed to monitor a permanently installed wideband oxygen sensor and alert the driver when air/fuel ratios rise above and adjustable threshold under boost. The unit triggers a bright blue LED mounted in the cockpit, which cannot be missed even in bright sunlight.
Of coarse, this requires a wideband oxygen sensor to be permanently installed in the car, as well as a boost pressure switch, which are about $20 from NAPA. I have mine setup to alert me of AFR’s above 11.7 over 10lbs of boost. It is adjustable to match almost any 0-5v wideband analog output, such as the Techedge, or FJO. On my car the light flickers slightly in second and stays off in 3rd+. This lets me know for sure that my engine is getting the propper fuel.
I am thinking getting some PC boards printed up if there is enough interest from to make it cost effective. I am thinking if I can get 20 people on board the cost will be under $50 for everything except the pressure switch. If you are interested you can e-mail me at radkins317@msn.com or post here.
As soon as the forum stops acting up I will post a pic of the light installed in my car.
Of coarse, this requires a wideband oxygen sensor to be permanently installed in the car, as well as a boost pressure switch, which are about $20 from NAPA. I have mine setup to alert me of AFR’s above 11.7 over 10lbs of boost. It is adjustable to match almost any 0-5v wideband analog output, such as the Techedge, or FJO. On my car the light flickers slightly in second and stays off in 3rd+. This lets me know for sure that my engine is getting the propper fuel.
I am thinking getting some PC boards printed up if there is enough interest from to make it cost effective. I am thinking if I can get 20 people on board the cost will be under $50 for everything except the pressure switch. If you are interested you can e-mail me at radkins317@msn.com or post here.
As soon as the forum stops acting up I will post a pic of the light installed in my car.
#2
No it's not Turbo'd
Sounds Interesting, allthough, by the time it heads into leaner afr's, it's usually too late... I like alarms, but I'd like it better if it retarded sparc if it noticed a lean condition... but I also know that's beyod the scope of your project...
I was reading something about pressure sensors in spark plugs to detect detonation !? That sounds cool, how much for plugs !?
I was reading something about pressure sensors in spark plugs to detect detonation !? That sounds cool, how much for plugs !?
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Originally posted by DCrosby
Sounds Interesting, allthough, by the time it heads into leaner afr's, it's usually too late... I like alarms, but I'd like it better if it retarded sparc if it noticed a lean condition... but I also know that's beyod the scope of your project...
I was reading something about pressure sensors in spark plugs to detect detonation !? That sounds cool, how much for plugs !?
Sounds Interesting, allthough, by the time it heads into leaner afr's, it's usually too late... I like alarms, but I'd like it better if it retarded sparc if it noticed a lean condition... but I also know that's beyod the scope of your project...
I was reading something about pressure sensors in spark plugs to detect detonation !? That sounds cool, how much for plugs !?
Last edited by radkins; 06-03-04 at 01:16 PM.
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Originally posted by billyrohm
Will it work with the innovate? My innovate already logs boost from the map sensor. Will it work in conjuntioin with that?
Will it work with the innovate? My innovate already logs boost from the map sensor. Will it work in conjuntioin with that?
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Originally posted by zyounker
Eh, unless it can proactively add fuel. it is worthless.. Driver would most likely react to slowly..
And to make it worthwhile you would need one on each exhaust port.
Eh, unless it can proactively add fuel. it is worthless.. Driver would most likely react to slowly..
And to make it worthwhile you would need one on each exhaust port.
BTW, is anyone else having problems posting pics?
Last edited by radkins; 06-04-04 at 04:40 PM.
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This actually sounds like a great idea to me. I'm not one to 'squeeze' every last drop out of my engine so I'd prefer to run AFR that is 0.5 on the conservative side. I could set the light/cut to come on if it exceeds my tuning number which still has some margin for error in it thus giving the system time to react (hopefully).
I'd love to see pics and install steps.
I'd love to see pics and install steps.
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Originally posted by patriick
Good idea. Sounds like you're using a voltage comparator on the WBO2's analog output. Why not do the same with the stock MAP output instead of using a boost-switch?
Good idea. Sounds like you're using a voltage comparator on the WBO2's analog output. Why not do the same with the stock MAP output instead of using a boost-switch?
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Random thought:
Most people that run higher boost have some sort of aftermarket boost controller. Could another step (say 0.5 above the warning level) be added to kill the power to the boost controller via a relay? Using stock turbos and your set point as an example: 12.2 AFR may spell trouble at 15lbs, but be ok at 7lbs. Not fool proof, but could be helpful in many situations.
I like the idea, but if it could be made proactive cheap and simple would make it even better.
Most people that run higher boost have some sort of aftermarket boost controller. Could another step (say 0.5 above the warning level) be added to kill the power to the boost controller via a relay? Using stock turbos and your set point as an example: 12.2 AFR may spell trouble at 15lbs, but be ok at 7lbs. Not fool proof, but could be helpful in many situations.
I like the idea, but if it could be made proactive cheap and simple would make it even better.
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You could also use the power used for the blue light to activate a solenoid valve which in turn would vent your boost simmilar to a pop-off valve, but controlled in conjunction with a/f ratios. You could set it up to turn the light on where you feel uncomfortable and set it to vent boost when you feel your motor would be close to kaboom. The blue light being on would cause you to lift your foot which would help you to not overspin your turbos. The Blue light would be a warning and if you didnt react quick enough, the valve would be the last ditch effort to save your ***.
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I've had my FJO installed and running all the time for over 2 years - most of that time on race fuel - still working fine.
If you have a turbo car (especially one as fragile as the 7) you are crazy not to have one IMO.
If you have a turbo car (especially one as fragile as the 7) you are crazy not to have one IMO.
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Originally posted by skunks
wideband O2 sensor last about ~500 hours on pump gas
wideband O2 sensor last about ~500 hours on pump gas
#24
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Originally posted by skunks
wideband O2 sensor last about ~500 hours on pump gas
wideband O2 sensor last about ~500 hours on pump gas
OEM emissions systems must stay functional for a minimum of 50,000 miles or the manufacturer must make repairs for free. (That might be 100,000mi now) Are you suggesting that Honda assumed an average speed of 100mph, including stops and idling, for their little economy car?