Check my Tables Please
#1
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Check my Tables Please
Hey guys im getting ready to start autotunning and want to double check my afr target table. curly sent me a picture of his table and i copyed it, so i figure it will get it close.
Thanks
Thanks
#2
I would recommend just under stoich at idle - about 14-14.5 works for a more stable idle. 15.5 at 5000rpm is a bit high. Also 15.5 at 70kPa is a bit high. Consider dropping both a bit. Also want to be closer to 13:1 at 100kPa for optimum performance and to keep you from blowing the motor. Numbers in the high kPa look decent.
#3
My setups for my street car.
Speed Density
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MAF
Still fine tuning this one
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Speed Density
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MAF
Still fine tuning this one
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#4
The following is copied from a post I made here: https://www.miataturbo.net/mspnp-55/afr-rpms-fluctuate-62513/
"Your AFR target table should be based upon a knowledge of theoretical engine operating conditions and gasoline chemistry. A few relevant AFR's:
1. Stoichiometric is when gasoline and air combust and theoretically produce nothing by water and carbon dioxide byproducts (i.e., no extra oxygen or unburned fuel present and minimum carbon monoxide). This ratio is 14.7:1 (Air:Fuel). NBO2 sensors are designed to switch at this AFR.
2. Maximum torque happens when your mixture burns the most quickly. ~12.5:1 is the target for this.
3. Richening the mixture past 12.5:1 has the effect of slowing combustion. This helps resist detonation.
4. On the lean side, you can go leaner than 14.7:1 and get some economy benefits in parts of the AFR table where it makes sense to do so.
5. In the idle region, going a bit richer than 14.7:1 usually results in best idle quality. You should have seen that during your idle tuning.
So, based upon the above, this is what I'm doing in my AFR table:
Note that I'm running water injection. If you're not, I recommend you richen the boost region by at least half a point (i.e., the 200kPa row would be 11.5:1)."
"Your AFR target table should be based upon a knowledge of theoretical engine operating conditions and gasoline chemistry. A few relevant AFR's:
1. Stoichiometric is when gasoline and air combust and theoretically produce nothing by water and carbon dioxide byproducts (i.e., no extra oxygen or unburned fuel present and minimum carbon monoxide). This ratio is 14.7:1 (Air:Fuel). NBO2 sensors are designed to switch at this AFR.
2. Maximum torque happens when your mixture burns the most quickly. ~12.5:1 is the target for this.
3. Richening the mixture past 12.5:1 has the effect of slowing combustion. This helps resist detonation.
4. On the lean side, you can go leaner than 14.7:1 and get some economy benefits in parts of the AFR table where it makes sense to do so.
5. In the idle region, going a bit richer than 14.7:1 usually results in best idle quality. You should have seen that during your idle tuning.
So, based upon the above, this is what I'm doing in my AFR table:
Note that I'm running water injection. If you're not, I recommend you richen the boost region by at least half a point (i.e., the 200kPa row would be 11.5:1)."
#5
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I would recommend just under stoich at idle - about 14-14.5 works for a more stable idle. 15.5 at 5000rpm is a bit high. Also 15.5 at 70kPa is a bit high. Consider dropping both a bit. Also want to be closer to 13:1 at 100kPa for optimum performance and to keep you from blowing the motor. Numbers in the high kPa look decent.
And i will change the 100 kpa to, 13. what should the 15.5's you mentioned drop down to.
#9
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I would make the following modifications:
100kpa row/7000:12
100kpa row/6000:12.5
100kpa row/5000: 12.7
100kpa row/4000:13
100kpa row/3000:13
100kpa row/2000:13.5
100kpa row/1000:13.5
Interpolate along Y Axis to your 200kpa targets. They are fine.
100kpa row/7000:12
100kpa row/6000:12.5
100kpa row/5000: 12.7
100kpa row/4000:13
100kpa row/3000:13
100kpa row/2000:13.5
100kpa row/1000:13.5
Interpolate along Y Axis to your 200kpa targets. They are fine.
#11
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Here's my "real" target table.
I certainly prioritized track reliability over streetability, since it's not a street car. I appreciate the sentiment by stealing my table, but there's probably better ones out there.
I certainly prioritized track reliability over streetability, since it's not a street car. I appreciate the sentiment by stealing my table, but there's probably better ones out there.