Question about MAF logging in an M6
Question about MAF logging in an M6 If this is stupid, I apologize. Just trying to learn to tune my car as I have time.
I have some questions about driving around getting logs for MAF tweaking in a 6 speed.
1. When I slow down, should I stay off of the clutch, or always push the clutch in? My AFR goes anorexia lean if I stay off of the clutch, but if I keep the clutch in, it seems to recover pretty quick.
2. Is highway or surface street driving better, half and half, 25/75...... ?
3. Is it better to use the HP Tuners "multiply by % minus half" or create a spreadsheet that converts it to take smaller steps, like 1/4, or 1/5, or even 1/10?
I have some questions about driving around getting logs for MAF tweaking in a 6 speed.
1. When I slow down, should I stay off of the clutch, or always push the clutch in? My AFR goes anorexia lean if I stay off of the clutch, but if I keep the clutch in, it seems to recover pretty quick.
2. Is highway or surface street driving better, half and half, 25/75...... ?
3. Is it better to use the HP Tuners "multiply by % minus half" or create a spreadsheet that converts it to take smaller steps, like 1/4, or 1/5, or even 1/10?
TECH Senior Member
Joined: Jun 2016
Posts: 22,291
Likes: 3,616
From: Central Cal.
I'm NO expert here, but my thinking is.... drive it as you normally would, using "correct" driving technique, and then the record will show a true picture of what happens when driven normally. Anything else is pretensive and fabricated. THEN you have a truthful... "Let the record show..."
TECH Enthusiast
Joined: Mar 2005
Posts: 663
Likes: 384
From: South Carolina
Multiply by half.
Make sure DFCO (deceleration fuel cutoff) is disabled.
If enabled on decell the wideband goes off the chart lean reading --- --- ---- dashes which will correlate in the VCM scanners data.
Make sure DFCO (deceleration fuel cutoff) is disabled.
If enabled on decell the wideband goes off the chart lean reading --- --- ---- dashes which will correlate in the VCM scanners data.
TECH Enthusiast
Joined: Mar 2005
Posts: 663
Likes: 384
From: South Carolina
Yes ECT will never see 284* so DFCO is disabled.
As for driving when collecting data for scaling MAF...
I like doing normal driving around town and on the hwy. After I've flashed, rinsed, repeat... I'll go out and do slow acceleration up to where PE is set to kick in, lets say to 3000 RPM through each gear then letting off the throttle. This will hit those cells that you don't hit during normal driving. This data is good for slowly accelerating up without going WOT and into PE.
As for driving when collecting data for scaling MAF...
I like doing normal driving around town and on the hwy. After I've flashed, rinsed, repeat... I'll go out and do slow acceleration up to where PE is set to kick in, lets say to 3000 RPM through each gear then letting off the throttle. This will hit those cells that you don't hit during normal driving. This data is good for slowly accelerating up without going WOT and into PE.
