Stock Maf Limits

COSMO · 10-29-2014, 10:01 AM

Did some logs yesterday and it seems my stock maf's are almost maxed out right at 17psi with the gtm tt kit. 3" intake tubes. GTM knew that, that's why they went with bigger intakes..

Patrick@AAMComp · 10-29-2014, 10:25 AM

If any of you need upgrades, I can get you a good deal on our Z-MAFs.

BBRSpeedWorks · 10-29-2014, 12:49 PM

Quote:

Originally Posted by COSMO

Did some logs yesterday and it seems my stock maf's are almost maxed out right at 17psi with the gtm tt kit. 3" intake tubes. GTM knew that, that's why they went with bigger intakes..

I plan to be pushing 18psi in the next couple of weeks. I'll let you know how my setup works with the tall maf stand offs

Mitco39 · 10-29-2014, 12:57 PM

Since this got bumped up today ill post something I noticed.

Does anyone see that even though the MAF voltage is not maxed out the flow rate max's out within Uprev? Is this a limitation to Uprev or the ECU itself? I want to say off the top of my head that the max flow it will read is something like 268 or something like that, but there is still plenty of voltage to go.

ANMVQ · 10-29-2014, 01:42 PM

I can verify that that's the MAFgm's I'm seeing NA (268.79) with MAF volts mid low 4's 4.2's-3's

Mitco39 · 10-29-2014, 01:46 PM

Yeah and it does not increase if you go with a higher voltage than 4.2.I dont know if this is a limitation to the logging software in Uprev or what.

COSMO · 10-29-2014, 02:55 PM

Mine are right at 4.8v right at 17psi in the upper rpm range..

Mitco39 · 10-29-2014, 03:37 PM

Quote:

Originally Posted by COSMO

Mine are right at 4.8v right at 17psi in the upper rpm range..

But what does your flow rate do right around there? Mine maxx's out even though there is still breathing room in terms of voltage.

COSMO · 10-29-2014, 05:11 PM

More than happy to post up my log if you guys have the program to view it.?

BBRSpeedWorks · 10-29-2014, 06:11 PM

i got it...

Mitco39 · 10-29-2014, 06:37 PM

Post it up its all done in CSV format anyway. Or if you could confirm that lets say above 4.5 volts that the maf flow rate continues to rise after 4.5 volts?

COSMO · 10-29-2014, 07:45 PM

Trying to upload but it keep coming back saying invalid file.. ideas?

BBRSpeedWorks · 10-29-2014, 08:07 PM

screen shot or pic off your phone

ANMVQ · 10-30-2014, 10:24 AM

I wouldn't expect mine to be maxing at 5 NA but heres mine at 4.9Vlts and the 268.79 MAFgm's

MAS A/F -B1 (V) 4.26

MAS A/F -B2 (V) 4.49

B-FUEL SCHDL (ms) 19.7

MAF GM/S (gm/s) 268.79

Mitco39 · 10-30-2014, 07:47 PM

Yeah that 268.79 will stay there at like anything after 4.1 volts if I recall correctly. I dont know if thats a limitation on the car or in the uprev package. I guess the way to find out is call and ask them about it.

10-29-2014, 10:25 AM	#122 (permalink)
Patrick@AAMComp Base Member Join Date: Sep 2014 Location: Maryland Posts: 160 Drives: with steering wheel Rep Power: 19	If any of you need upgrades, I can get you a good deal on our Z-MAFs. __________________ Luis R. aamcompetition.com

10-29-2014, 12:57 PM	#124 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 131	Since this got bumped up today ill post something I noticed. Does anyone see that even though the MAF voltage is not maxed out the flow rate max's out within Uprev? Is this a limitation to Uprev or the ECU itself? I want to say off the top of my head that the max flow it will read is something like 268 or something like that, but there is still plenty of voltage to go. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

10-29-2014, 01:42 PM	#125 (permalink)
ANMVQ A True Z Fanatic Join Date: Mar 2011 Location: Framingham MA Posts: 2,732 Drives: 2014 Q50 AWD Rep Power: 19	I can verify that that's the MAFgm's I'm seeing NA (268.79) with MAF volts mid low 4's 4.2's-3's __________________ 14 Q50 AWD, ARK, ECUTEK (SEB), Takda, Last edited by ANMVQ; 10-29-2014 at 01:47 PM.

10-29-2014, 01:46 PM	#126 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 131	Yeah and it does not increase if you go with a higher voltage than 4.2.I dont know if this is a limitation to the logging software in Uprev or what. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

10-29-2014, 02:55 PM	#127 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 19	Mine are right at 4.8v right at 17psi in the upper rpm range.. Merv likes this.

10-29-2014, 10:01 AM	#121 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 19	Did some logs yesterday and it seems my stock maf's are almost maxed out right at 17psi with the gtm tt kit. 3" intake tubes. GTM knew that, that's why they went with bigger intakes..

10-29-2014, 05:11 PM	#129 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 19	More than happy to post up my log if you guys have the program to view it.?

10-29-2014, 06:11 PM	#130 (permalink)
BBRSpeedWorks Premium Member Join Date: Dec 2013 Location: Ft. Stwart Posts: 366 Drives: 370z,350z,300z,talon Rep Power: 11	i got it... __________________ God'Z Gift.

10-29-2014, 06:37 PM	#131 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 131	Post it up its all done in CSV format anyway. Or if you could confirm that lets say above 4.5 volts that the maf flow rate continues to rise after 4.5 volts? __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

10-29-2014, 07:45 PM	#132 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 19	Trying to upload but it keep coming back saying invalid file.. ideas?

10-29-2014, 08:07 PM	#133 (permalink)
BBRSpeedWorks Premium Member Join Date: Dec 2013 Location: Ft. Stwart Posts: 366 Drives: 370z,350z,300z,talon Rep Power: 11	screen shot or pic off your phone __________________ God'Z Gift.

10-30-2014, 10:24 AM	#134 (permalink)
ANMVQ A True Z Fanatic Join Date: Mar 2011 Location: Framingham MA Posts: 2,732 Drives: 2014 Q50 AWD Rep Power: 19	I wouldn't expect mine to be maxing at 5 NA but heres mine at 4.9Vlts and the 268.79 MAFgm's MAS A/F -B1 (V) 4.26 MAS A/F -B2 (V) 4.49 B-FUEL SCHDL (ms) 19.7 MAF GM/S (gm/s) 268.79 __________________ 14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

10-30-2014, 07:47 PM	#135 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 131	Yeah that 268.79 will stay there at like anything after 4.1 volts if I recall correctly. I dont know if thats a limitation on the car or in the uprev package. I guess the way to find out is call and ask them about it. BBRSpeedWorks likes this. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

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