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07-17-2004, 12:29 AM
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#1 |
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Registered User
Join Date: Nov 2002
Location: Lake Stevens Wa.
Posts: 25
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mass airflow sensor
does anyone recomend buying a suposedly slightly used granatelli MAS for $75? What kind of lifespan do these have? thanks.
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'72 Cheyenne/Super 20 4X4 (350) '97 Silverado Ext. Cab Z71 (350,6"susp,35"Mud TA's,Hypertech). '77 C10 stepside (402) '72 Lemans Endura conv. |
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07-17-2004, 11:04 AM
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#2 |
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Registered User
Join Date: Oct 2003
Location: Broken Bow, OK
Posts: 1,385
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I have never heard anybody actually say that they were happy with a Granitelli unit. I have heard a lot of people say that they have had prblems with them though.
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95 K3500 SRW 5.7L Vortec 4L80e 4.10 G80 2001 GMC C3 6.0 AWD, Volant, 3/5 drop TBSS intake, HP tuners, pullies, 05 efans, 05 front brakes, etc. 2003 Tahoe Z71 Silverado front clip |
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07-21-2004, 10:15 PM
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#3 |
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Registered User
Join Date: Mar 2003
Location: Columbus Ohio
Posts: 1,413
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I have one on my 98, and it works well. I dropped almost 2 tenths in the quarter, and have had it for a year with no problems. It is quite expensive new, but I figured that I might need it when I put a new throttle body on. New 80mm throttle body will be installed this coming weekend, which is much later than I hoped.
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07-22-2004, 01:25 PM
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#4 |
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Registered User
Join Date: Oct 2003
Location: Broken Bow, OK
Posts: 1,385
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Hmm, maybe this is a case of only hearing about the bad side of something.
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95 K3500 SRW 5.7L Vortec 4L80e 4.10 G80 2001 GMC C3 6.0 AWD, Volant, 3/5 drop TBSS intake, HP tuners, pullies, 05 efans, 05 front brakes, etc. 2003 Tahoe Z71 Silverado front clip |
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07-22-2004, 07:25 PM
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#5 |
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Registered User
Join Date: Jun 2004
Location: Gilbert, AZ
Posts: 67
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What is the Mass Airflow system? Where does it go and what does it do?
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'98 Chevy Silverado Ex Cab Z-71 '02 GMC Yukon SLE 4x4 |
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07-22-2004, 09:30 PM
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#6 | |
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Registered User
Join Date: Oct 2003
Location: Broken Bow, OK
Posts: 1,385
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Quote:
EFI uses either a MAFS or MAPS (Manifold absolute pressure sensor) to determine air intake. The MAFS is much more adaptable and reads true airflow, while the MAPS can only guess airflow based on a set table in the ECM that corresponds to pressure in the manifold. Vortec engines use Mass Air Flow with a MAP back-up system.
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95 K3500 SRW 5.7L Vortec 4L80e 4.10 G80 2001 GMC C3 6.0 AWD, Volant, 3/5 drop TBSS intake, HP tuners, pullies, 05 efans, 05 front brakes, etc. 2003 Tahoe Z71 Silverado front clip |
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07-23-2004, 10:44 AM
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#7 |
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Registered User
Join Date: Jun 2004
Location: Gilbert, AZ
Posts: 67
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Thanks for the info. One more thing to look at.
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'98 Chevy Silverado Ex Cab Z-71 '02 GMC Yukon SLE 4x4 |
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