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Not enough MAF Points?
Posted: 2022 May 17, 14:58
by Nanserbe
The PMAS MAF I have came with a datasheet that has less points than what is loaded in the A9L2.
How do I get the remaining points?
Spreadsheet attached.
Re: Not enough MAF Points?
Posted: 2022 May 17, 15:06
by decipha
Yeah 7 or 9 points is typical to test a maf sensor its only to show that the sensor works and reads air flow it is not a maf curve.
In order to get an actual maf curve you have to send in your intake manifold complete with the throttle body, inlet piping, air filter assembly and all - 100% identical to how it is in the vehicle.
PMAS makes about 25 different slot sensors that look identical so you'll need to manually dial it in as it could be any of them.
Its easy enough just let tunerpro correct it for you using the histograms
Re: Not enough MAF Points?
Posted: 2022 May 17, 16:47
by Nanserbe
decipha wrote: ↑2022 May 17, 15:06
Yeah 7 or 9 points is typical to test a maf sensor its only to show that the sensor works and reads air flow it is not a maf curve.
In order to get an actual maf curve you have to send in your intake manifold complete with the throttle body, inlet piping, air filter assembly and all - 100% identical to how it is in the vehicle.
PMAS makes about 25 different slot sensors that look identical so you'll need to manually dial it in as it could be any of them.
Its easy enough just let tunerpro correct it for you using the histograms
Can/should I start with the included 7 or 9 points?
Or start with one of the MAF transfer curves from here?:
http://efidynotuning.com/maf.htm
Re: Not enough MAF Points?
Posted: 2022 May 17, 16:54
by dleach1407
You can call pmas and give them the serial on the sensor and they can tell you which sensor you have. Then you go to their site and download the appropriate spreadsheet that calculates the maf curve points.
Re: Not enough MAF Points?
Posted: 2022 May 17, 16:57
by dleach1407
https://www.pmas-maf.com/transfer-function/
If it's a newer style sensor it should be clearly labeled which sensor it is. If it's an early one its harder to identify. The outage listed above should help you identify which you have. Both of mine are 10 years old and still going strong. They are the first generation sensor.
Re: Not enough MAF Points?
Posted: 2022 May 17, 17:52
by Nanserbe
dleach1407 wrote: ↑2022 May 17, 16:57
https://www.pmas-maf.com/transfer-function/
If it's a newer style sensor it should be clearly labeled which sensor it is. If it's an early one its harder to identify. The outage listed above should help you identify which you have. Both of mine are 10 years old and still going strong. They are the first generation sensor.
It's a little older, I don't see it on the website. I'm not sure if this photo will show up or not.
Re: Not enough MAF Points?
Posted: 2022 May 17, 18:42
by dleach1407
That is not a slot maf, thats an old school "tonsil" style maf. You should be able to use a stock maf curve and just multiply the whole curve by .90, maybe .85 to get it close since its calibrated for 24s. Youre going to have to dial it in regardless.
Re: Not enough MAF Points?
Posted: 2022 May 17, 19:19
by Nanserbe
dleach1407 wrote: ↑2022 May 17, 18:42
That is not a slot maf, thats an old school "tonsil" style maf. You should be able to use a stock maf curve and just multiply the whole curve by .90, maybe .85 to get it close since its calibrated for 24s. Youre going to have to dial it in regardless.
Since I have Siemen's 60lb injectors, I'll need to multiply the curve by 2.5, right? (60 / 24)
Re: Not enough MAF Points?
Posted: 2022 May 17, 20:57
by decipha
no, the maf has nothing to do with the injectors.
You simply copy and paste the actual maf curve in your tune from the homepage
fox 24lb curve since ita cald for 24s
Re: Not enough MAF Points?
Posted: 2022 May 17, 21:18
by dleach1407
^^^that works too.