Air Fuel Ratio Controller/Sensor
Discussion
My digital dash supports a AFR meter and I'm thinking of installing one.
Looking at the company's website (ETB) they use the Innovate LC1 controller etc, but on reading the Innovate forum looks like they are problematic, does any one run the Innovate LC1 AFR or can recommend another from experience?
LuckyP what did you install?
Looking at the company's website (ETB) they use the Innovate LC1 controller etc, but on reading the Innovate forum looks like they are problematic, does any one run the Innovate LC1 AFR or can recommend another from experience?
LuckyP what did you install?
Innovate kit # 2:
http://www.innovatemotorsports.com/products/kits.p...
LC-1 sensor, XD-16 guage and a SSI-4 interface (not used at present)
No probs getting to work......just need to know what it means now
http://www.innovatemotorsports.com/products/kits.p...
LC-1 sensor, XD-16 guage and a SSI-4 interface (not used at present)
No probs getting to work......just need to know what it means now
LuckyP said:
Sorry to butt in, but am I correct in thinking that:
14.7 is best for economy and being a greeny...[yawn]
and
12.8 to 13.2 is about on the money for best power?
14.7 will give the best compromise between power and economy/environment.14.7 is best for economy and being a greeny...[yawn]
and
12.8 to 13.2 is about on the money for best power?
12 to 13 will be good for power.
For max economy/environment some say you can go out to 16 in no load cruise but that will be more difficult to control (efi) and will likely have pick-up issues as you try to accelerate away from the cruise.
I also have an LC1 but have had, and am still having, issues with mine.
Steve
Fitting an AFR system is on my mind just now. My wife has been driving round behind my Can-am with the air-con in her car set to recirculation, the Can-am fuel fumes are so strong ! I am new to Ultimas but my MPG seems to be low even for a SBC 383, I haven’t worked it out yet (I almost don't want to know) but I think were talking sub 10 mpg whilst driving in cruise mode.
I am planning to fit an AFR system to see what’s going off with the mixture and possibly I might look at running a closed loop lambda setup on my ECU. My ECU supplier, Emerald, have recommended Edgetech AFR systems. Has anyone had any experience with them ?
http://trigger-wheels.com/store/index1.html
Nick.
I am planning to fit an AFR system to see what’s going off with the mixture and possibly I might look at running a closed loop lambda setup on my ECU. My ECU supplier, Emerald, have recommended Edgetech AFR systems. Has anyone had any experience with them ?
http://trigger-wheels.com/store/index1.html
Nick.
LC-1's are cheap and mostly OK, used many of them, one or two have had issues out the box, but they have just been replaced.
as for what you should be aiming for, assuming you have a CAT, then you HAVE to run Lambda 1 (14.7 A/F for petrol) at idle and light to medium loads.
At medium to high loads, it's down to the engines charicteristics, but it will usually want to be somewhere between 12 and 13 (to 1 A/F).
An increasing number of ECU's now have target Lambda mapps, so you can pre-set what lambda target you are aiming for and they will adjust the fueling to meet the target (and then store the corrections requred etc etc).
assuming you have to pass an MOT emmissions test, they measure CO and HC, but also check that the engine is running at lambda 1 (14.7 A/F).
riskes of running outside of these numbers are:
too rich (as in 11 and lower) you will wash the bores of oil, accelerating engine wear and also contaminating the oil in the sump, along with sooting up the CAT etc.
too lean (as in Higher than 14.7 at medium loads or 13 at high loads) and you risk overheating the pistons and pushing the engine into detonation, you will also heat up the exhaust and CAT massively.
as for what you should be aiming for, assuming you have a CAT, then you HAVE to run Lambda 1 (14.7 A/F for petrol) at idle and light to medium loads.
At medium to high loads, it's down to the engines charicteristics, but it will usually want to be somewhere between 12 and 13 (to 1 A/F).
An increasing number of ECU's now have target Lambda mapps, so you can pre-set what lambda target you are aiming for and they will adjust the fueling to meet the target (and then store the corrections requred etc etc).
assuming you have to pass an MOT emmissions test, they measure CO and HC, but also check that the engine is running at lambda 1 (14.7 A/F).
riskes of running outside of these numbers are:
too rich (as in 11 and lower) you will wash the bores of oil, accelerating engine wear and also contaminating the oil in the sump, along with sooting up the CAT etc.
too lean (as in Higher than 14.7 at medium loads or 13 at high loads) and you risk overheating the pistons and pushing the engine into detonation, you will also heat up the exhaust and CAT massively.
Scuffers said:
...as for what you should be aiming for, assuming you have a CAT, then you HAVE to run Lambda 1 (14.7 A/F for petrol) at idle and light to medium loads.
At medium to high loads, it's down to the engines charicteristics, but it will usually want to be somewhere between 12 and 13 (to 1 A/F)....
Scuffers, do those figures change if you don't have CATs? Don't think the OP has one and I know I don't.At medium to high loads, it's down to the engines charicteristics, but it will usually want to be somewhere between 12 and 13 (to 1 A/F)....
LuckyP said:
Scuffers said:
...as for what you should be aiming for, assuming you have a CAT, then you HAVE to run Lambda 1 (14.7 A/F for petrol) at idle and light to medium loads.
At medium to high loads, it's down to the engines charicteristics, but it will usually want to be somewhere between 12 and 13 (to 1 A/F)....
Scuffers, do those figures change if you don't have CATs? Don't think the OP has one and I know I don't.At medium to high loads, it's down to the engines charicteristics, but it will usually want to be somewhere between 12 and 13 (to 1 A/F)....
if you can get the engine to run cleanly at 15-16 AF then it's going to save some fuel, the problem is that you need a good designed engine to run cleanly at this level of leaness. Every engine (type) is different in how they respond to A/F and timming.
14.7 is a safe bet, so start there.
Scuffers said:
LuckyP said:
Scuffers said:
...as for what you should be aiming for, assuming you have a CAT, then you HAVE to run Lambda 1 (14.7 A/F for petrol) at idle and light to medium loads.
At medium to high loads, it's down to the engines charicteristics, but it will usually want to be somewhere between 12 and 13 (to 1 A/F)....
Scuffers, do those figures change if you don't have CATs? Don't think the OP has one and I know I don't.At medium to high loads, it's down to the engines charicteristics, but it will usually want to be somewhere between 12 and 13 (to 1 A/F)....
if you can get the engine to run cleanly at 15-16 AF then it's going to save some fuel, the problem is that you need a good designed engine to run cleanly at this level of leaness. Every engine (type) is different in how they respond to A/F and timming.
14.7 is a safe bet, so start there.
I've never seen mine go aove 14 yet, or lower than 11.
jschwartz said:
I use an Innovate wideband unit for tuning.
You can't have any exhaust leaks or the readings will be inaccurate of what the engine is actually running at, slip joints or anything that leaks upstream from the O2 is trouble.
Jeff, what AFR do you tune to and at what stage of throttle/load on carbed SBC?You can't have any exhaust leaks or the readings will be inaccurate of what the engine is actually running at, slip joints or anything that leaks upstream from the O2 is trouble.
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