Screencast: MAF and Speed Density - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

jamesm · 02-07-2014, 06:46 PM

[ame="http://youtu.be/VS8lZCNzR5U"]http://youtu.be/VS8lZCNzR5U[/ame]

One thing I forgot to mention in the video is that if you're going to use a charge air temperature sensor (or blow-through MAF's internal IAT sensor), you'll want to zero out the temperature comps by putting '100' in for all of the values.

Another thing i just noticed is that if you were NA you could theoretically still use the MAF's internal sensor and not worry about comps, but then who tunes with speed density while n/a? Nobody lol. For people with no IAT whatsoever (which is none of us), you'll need to use the calibration temperature and compensations.

Other than that it's just a basic primer on MAF and speed density, what they are, how they work and what they're each good for. Also provides a very basic overview of the different options with RaceRom and how to get started setting it up.

More in-depth screencasts covering the tuning of both systems will be available soon.

mrk1 · 02-07-2014, 10:50 PM

Yeah Im going to give this a shot

AZFA20 · 02-07-2014, 11:12 PM

Very generous of you to have taken the time to show some of the basics for individuals to experiment with EcuTek. As EcuTeks portfolio continues to grow of neat things that can be done in some of the advanced mapping features it will be interesting to see what the community comes up with in a year or so now that we have end user access to it.

SmsAlSuwaidi · 02-07-2014, 11:39 PM

James i love you, no homo ! thank you so much for this vid. Slowly grasping more and more about tuning

So to raise the maf limit the only way possible is having a larger pipe ?

jamesm · 02-08-2014, 10:51 AM

Quote:

Originally Posted by SmsAlSuwaidi

James i love you, no homo ! thank you so much for this vid. Slowly grasping more and more about tuning

So to raise the maf limit the only way possible is having a larger pipe ?

Bigger pipe means it can meter more airflow (more air flow for a given voltage) but also that the air slows down, so it becomes harder to meter at low speed. It's not the slam dunk solution that some would suggest, but it works. I wouldn't go bigger than 3" since any larger would require a reducer into the throttle body.

tg_1981 · 02-08-2014, 02:40 PM

@jamesm Love it keep giving away the farm!!!

charged86 · 02-08-2014, 03:19 PM

jamesm for tuning president

02-07-2014, 06:46 PM	#1
jamesm Banned Join Date: Mar 2013 Drives: 2013 FR-S Location: Orlando, FL Posts: 2,929 Thanks: 1,166 Thanked 2,293 Times in 1,180 Posts Mentioned: 313 Post(s) Tagged: 4 Thread(s)	Screencast: MAF and Speed Density [ame="http://youtu.be/VS8lZCNzR5U"]http://youtu.be/VS8lZCNzR5U[/ame] One thing I forgot to mention in the video is that if you're going to use a charge air temperature sensor (or blow-through MAF's internal IAT sensor), you'll want to zero out the temperature comps by putting '100' in for all of the values. Another thing i just noticed is that if you were NA you could theoretically still use the MAF's internal sensor and not worry about comps, but then who tunes with speed density while n/a? Nobody lol. For people with no IAT whatsoever (which is none of us), you'll need to use the calibration temperature and compensations. Other than that it's just a basic primer on MAF and speed density, what they are, how they work and what they're each good for. Also provides a very basic overview of the different options with RaceRom and how to get started setting it up. More in-depth screencasts covering the tuning of both systems will be available soon. Last edited by jamesm; 02-08-2014 at 03:27 PM.

02-07-2014, 10:50 PM	#2
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	Yeah Im going to give this a shot __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

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02-07-2014, 11:39 PM	#4
SmsAlSuwaidi Boosted Join Date: Feb 2013 Drives: Not a supra....yet Location: Riverside,CA/ Abu Dhabi,UAE Posts: 2,925 Thanks: 487 Thanked 1,203 Times in 812 Posts Mentioned: 90 Post(s) Tagged: 2 Thread(s)	James i love you, no homo ! thank you so much for this vid. Slowly grasping more and more about tuning So to raise the maf limit the only way possible is having a larger pipe ?

02-08-2014, 03:19 PM	#7
charged86 Senior Member Join Date: Mar 2013 Drives: whiteout gt86 2015 IS350fsport Location: northern kentucky. cincy Posts: 1,931 Thanks: 2,154 Thanked 697 Times in 437 Posts Mentioned: 42 Post(s) Tagged: 0 Thread(s)	jamesm for tuning president

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