Opinions on my MAFless tune? Horist approved it for download.
#1
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If anybody wants to take a look at my tune and give me any feedback, Horist approved it on his site. I regret that some of the weak-@ss "pro" tuners will also have access to it (one in particular has been trying to weasel it out of me for a long time), but it is better that everyone can access it.
#2
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Nice smooth ve table...
How come you added so much timing to the base spark in park and drive tables????
Did that help that much with the surging and the bucking
What was th logic behind making these your R/L switch points
How come you added so much timing to the base spark in park and drive tables????
Did that help that much with the surging and the bucking
What was th logic behind making these your R/L switch points
366 436 436 436 457 491 501 457 457
#3
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Originally Posted by HumpinSS
Nice smooth ve table...
How come you added so much timing to the base spark in park and drive tables????
Did that help that much with the surging and the bucking
What was th logic behind making these your R/L switch points
How come you added so much timing to the base spark in park and drive tables????
Did that help that much with the surging and the bucking
What was th logic behind making these your R/L switch points
As for the surging, I was trying to tune it out with spark, airflow, etc. No help, but disabling proportional idle fixed the surging and bucking (so far). It definitely added more fuel add idle, and the PCM considered anything below 5% TPS idle territory. It was affecting my trims badly. The bucking and surging is definitely being caused by a lean condition. I noticed with LTFTs disabled I would occasionally get a surge until the STFTs stabilized in that cell, so low-rpm/high vacuum is definitely very sensitive to fueling problems. I have been trying to convince somebody else to verify my results, but nobody has posted any results.
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I turned off the idle porportional thing and it didnt seem to make a difference, but i also think its because i am not waiting long enough before flashes (letting the car learn the new idle settings/changes)
#7
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Originally Posted by 2000Firehawk
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What AFR did you setup your VE table for ?
Dave
What AFR did you setup your VE table for ?
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Dave
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Hello,
I've only had my HPTuner a week, so I have
a lot to learn...
Heard of 2 ways to set up VE -
Narrowband/STFT = like you are doing.
Wideband = setting up VE table for 13.0 AFR.
Maybe I'll try both...
Dave
I've only had my HPTuner a week, so I have
a lot to learn...
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Heard of 2 ways to set up VE -
Narrowband/STFT = like you are doing.
Wideband = setting up VE table for 13.0 AFR.
Maybe I'll try both...
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Dave
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You should tune the car for the desired AFR under non-tuning conditions... In otherwords, if when you are done tuning you want to have a 14.6:1 AFR, you should do all your tuning for the 14.6:1 AFR not 13.0:1....
#11
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Yep agreed, otherwise your closed loop ltft are going to be way -ve taking the fuel out to get to stoich at all points except PE. No need to fight closed loop, work with it unless you have reason to turn it off.
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I"m not understanding you. Why would you tune the car for stoich when about 12.8-13 makes the best power. And what do you mean tune the car under non-tuning conditions. Maybe i'm dumb but that just threw me way off.
#13
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Originally Posted by Pavetim
I"m not understanding you. Why would you tune the car for stoich when about 12.8-13 makes the best power. And what do you mean tune the car under non-tuning conditions. Maybe i'm dumb but that just threw me way off.
you tune the car to be at stoich when driving around... you know 99% of driving.
the power enrichment table then adds the fuel to make it 13.0 at WOT...
you dont want to be that rich all the time...
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Yes, you need to understand the difference between part throttle driving and full throttle tuning.
I'm not sure why people are talking about tuning part throttle to 13.0 AFR, that isn't a very good idea or even very attainable. I have heard of people tuning part throttle to like 15.4:1, but the only way you can really change your part throttle AFR is to adjust your switch points on your o2s so they don't oscillate so much in a certain direction.
Now, if you disable your o2s and run open-loop all the time, yes, you could command any AFR you want to at any time.
I'm not sure why people are talking about tuning part throttle to 13.0 AFR, that isn't a very good idea or even very attainable. I have heard of people tuning part throttle to like 15.4:1, but the only way you can really change your part throttle AFR is to adjust your switch points on your o2s so they don't oscillate so much in a certain direction.
Now, if you disable your o2s and run open-loop all the time, yes, you could command any AFR you want to at any time.
Last edited by Bombguy99z28; 12-14-2005 at 03:49 PM.