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Post by Quik5oh on Sept 2, 2017 9:28:37 GMT -5
Can the PiMPxs be setup to utilize mass-air or is it a speed-density only system? |
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Post by Stinger on Sept 2, 2017 14:26:50 GMT -5
It can do MAF but none of our 1000+ users have found a reason to do so and have ran it Speed Density.
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Post by Quik5oh on Sept 2, 2017 15:41:59 GMT -5
It certainly seems that way. Curious, is there a reason why Speed Density is preferred over MAF outside of not having a meter to deal with? My guess is that there are two schools of thought on MAF vs. SD and it's probably a Ford vs. Chevy type discussion. Have been under the impression that MAF allows for the best drivability and most consistent tuning due to the ability to measure airflow instead of computing it like SD, but perhaps technology has narrowed or closed that gap? Does the auto-tune functionality essentially replace the need for MAF and allow a measurement of airflow for constant, accurate recalibration? Is there something measuring airflow with the SD setup?
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Post by Stinger on Sept 2, 2017 16:12:22 GMT -5
When the ECU is not tuneable, MAF is superior as it can adjust for variables you can't tune for (mods, sensors wearing out, engine degradation over time, etc.). When you have an ECU that's completely tuneable that benefit goes away since you can tune for mods, see when sensors are wearing out and replace them, etc.
Nothing is measuring airflow with an SD system. The MAP is measuring pressure/load (vacuum/boost) which is what's used to determine fuel and spark requirements.
As to why our customers haven't used MAF, it's simply a matter of starting with speed density and getting done tuning and it running better than it's ever ran (even when it was MAF before). Once that happens, nobody has decided they needed to spend money on a MAF in hopes of improving something that already runs better than ever and perfect as far as they can tell. From what I've seen, most of the "benefits" people have reported with MAF with a tuneable ECU has been with idle quality but spark is a more responsive way to control idle. So those individuals chose to use MAF to fix idle rather than taking the time to use the features that are available to them to control idle (close loop idle control, idle spark table, etc.).
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Post by Quik5oh on Sept 2, 2017 16:19:12 GMT -5
Thanks for the information and explanation, certainly makes sense as to why a tuneable MAP ECU gets it done! When running MAF on the PiMPxs, does it function similar to the factory MAF setup, but with the ability to make changes?
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Post by Stinger on Sept 2, 2017 16:35:21 GMT -5
Yes, it functions similarly as far as "how it works".
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Post by Quik5oh on Sept 2, 2017 17:04:42 GMT -5
When using the MAF operation, is the MAP still being utilized or is Speed Density essentially switched off and MAF is the sole means of operation? I believe I've heard of some systems using both MAP and MAF, LS (Chevy) setups?
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Post by Stinger on Sept 2, 2017 20:10:38 GMT -5
Factory Fox Body's use a MAP sensor whether they are SD or MAF and our setup is no different in that regard.
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Post by dragtop on Apr 29, 2020 23:07:33 GMT -5
I would love to see a write up about setting up the pimpxs to run on maf. I've been running maf with the aem stand alone with overwhelming success. Sd lacks the accuracy as conditions change. So if I have to be the first one to use maf then I will be honored. Plese explain what the process is to change sd to maf if it is capable. Your help would be greatly appreciated. Thanks
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