BYPASS CLOSED LOOP(open loop tuning) questions
10-30-2009, 03:52 AM
#1
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BYPASS CLOSED LOOP(open loop tuning) questions
okay aimed at gurus....i know some of the people here have gotten around our self learning pesty ecu by just unplugging the front o2 sensor thus bringing the ca rinto a constant open loop...
how did you guys like that, and draw back beside the check engine light?
i feel like it would make life soo much easier
how did you guys like that, and draw back beside the check engine light?
i feel like it would make life soo much easier
10-30-2009, 04:02 AM
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Not really. PM crush02342002 he tuned my car in open loop. It isn't as easy as you would think on our cars. Any little variance causes a large effect overall. Plus when running the A/C over not you will have variances. Unless you want to change your tune every time you run the A/C you will have a good 1-1.5afr difference across the board.
10-30-2009, 04:12 AM
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Then you probably could do it without a problem. Just cut the o2 wire on your harness so you can reattach if you don't like it. You will throw a P2237 code or something like that. crush02342002 might have a basemap at that tune you could run, just PM him.
10-30-2009, 04:16 AM
#6
i run open loop....i like it....although if i had to go back....i would keep it in closed loop. theres no reason to run open loop. people say you cant partial tune, well you can with the greddy ultimate. you make a base fuel map for wot, then use the airflow adjustment map for partial throttle. only reason why i did it was i didnt have 220 to drop on an o2 sensor but i plan on getting it back on. you will never have as good of gas mileage compared to closed loop. plus you loose cruise control...well not loose it, but say im cruising at 15.0 afr....as soon as i turn cruise on it drops to 11.0.
with all that said....just get someone to tune your car with closed loop running. but if you want a tune thats open loop, i have tons. you have to tune alot more running open loop. i use i think 6 maps compared to using like 2-3 running closed loop.
with all that said....just get someone to tune your car with closed loop running. but if you want a tune thats open loop, i have tons. you have to tune alot more running open loop. i use i think 6 maps compared to using like 2-3 running closed loop.
10-30-2009, 04:20 AM
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10-30-2009, 04:22 AM
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lol and scionfred you were right about safc not being able to do anything with stock injectors i tried to tune on stock injectors today and lets just say only time under OWT that i wasnt seeing a 15.7 afr was at 4k-4.5k then the safc/ airflow was maxed and fuel just couldnt keep getting pumped..
will have 410cc in tomorrow hopefully itll add enough fuel
will have 410cc in tomorrow hopefully itll add enough fuel
10-30-2009, 04:42 AM
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i run open loop....i like it....although if i had to go back....i would keep it in closed loop. theres no reason to run open loop. people say you cant partial tune, well you can with the greddy ultimate. you make a base fuel map for wot, then use the airflow adjustment map for partial throttle. only reason why i did it was i didnt have 220 to drop on an o2 sensor but i plan on getting it back on. you will never have as good of gas mileage compared to closed loop. plus you loose cruise control...well not loose it, but say im cruising at 15.0 afr....as soon as i turn cruise on it drops to 11.0.
with all that said....just get someone to tune your car with closed loop running. but if you want a tune thats open loop, i have tons. you have to tune alot more running open loop. i use i think 6 maps compared to using like 2-3 running closed loop.
with all that said....just get someone to tune your car with closed loop running. but if you want a tune thats open loop, i have tons. you have to tune alot more running open loop. i use i think 6 maps compared to using like 2-3 running closed loop.
10-30-2009, 04:44 AM
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10-30-2009, 05:12 AM
#15
lol and scionfred you were right about safc not being able to do anything with stock injectors i tried to tune on stock injectors today and lets just say only time under OWT that i wasnt seeing a 15.7 afr was at 4k-4.5k then the safc/ airflow was maxed and fuel just couldnt keep getting pumped..
will have 410cc in tomorrow hopefully itll add enough fuel
will have 410cc in tomorrow hopefully itll add enough fuel
10-30-2009, 05:21 AM
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I hope so too. You're just gonna have to adjust your boost level to match the SAFC and injector limitations. Even 200whp will still be a lot more fun than 150whp. You can always upgrade the injectors and EM later. Then you can get your A/C back for those 95F, 95% humidity days in July and August.
yea i have a 4psi spring in the garage if push comes to shove ill throw it in
10-31-2009, 10:40 PM
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lol wasnt tryna bug you about it, anyways a base tune would be nice right now i have 410cc and afr is at 12.2 and then goes to 11.8 im adding about 34% fuel from 4k to 5500...then goes down to about 28% added till redine
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