MAf Differences 86-87 & 88-89
03-27-2003, 03:36 PM
#1
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MAf Differences 86-87 & 88-89
Does anyone know what the difference between the 86-87 MAF and 88-89 MAF? All I know is the part number is different.
03-27-2003, 04:09 PM
#3
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Re: MAf Differences 86-87 & 88-89 (dgoodhue)
I thought '85 had a little different electronics and '86-89 were the same.
I'm running the MAF from my '86 IROC-Z LB9 motor in the '88 Vette L98 with no problems.
I see mad has a price difference and an different part number, hmmm.
I'm running the MAF from my '86 IROC-Z LB9 motor in the '88 Vette L98 with no problems.
I see mad has a price difference and an different part number, hmmm.
03-27-2003, 04:21 PM
#4
Race Director
Re: MAf Differences 86-87 & 88-89 (65Z01)
http://www.c4vettes.com/maf.htm
Most of the C4 Corvettes used a MAF (Mass Air Flow) sensor to determine how much air is being pulled into the intake manifold. The exceptions are the 1984 Corvette that used a speed density system--a sort of predictive method of measurement---and the 1990 through 1993 C4 models which were also speed density based. In 1994, Corvette went back to the MAF based system but used the speed density approach as a back up. (1989 Bosch MAF installation shown at right).
A Mass Air Flow sensor has an extremely fine wire inside its bore. The 1985 through 1989 C4 engines used a Bosch MAF sensor that heated the wire to 100 C. The 1994 and later C4 models used a AC/Delco MAF that heated the wire to 200 C. The amount of current required to reach the temperature is measured in each case. (Note: the LT-5 engine used in the ZR-1 used a speed density system and continued to use that system in 1994 and 1995 since the engines had already been made prior to the last two years of production. The ZR-1 therefore has no MAF even after Corvette went back to the MAF based system).
Most of the C4 Corvettes used a MAF (Mass Air Flow) sensor to determine how much air is being pulled into the intake manifold. The exceptions are the 1984 Corvette that used a speed density system--a sort of predictive method of measurement---and the 1990 through 1993 C4 models which were also speed density based. In 1994, Corvette went back to the MAF based system but used the speed density approach as a back up. (1989 Bosch MAF installation shown at right).
A Mass Air Flow sensor has an extremely fine wire inside its bore. The 1985 through 1989 C4 engines used a Bosch MAF sensor that heated the wire to 100 C. The 1994 and later C4 models used a AC/Delco MAF that heated the wire to 200 C. The amount of current required to reach the temperature is measured in each case. (Note: the LT-5 engine used in the ZR-1 used a speed density system and continued to use that system in 1994 and 1995 since the engines had already been made prior to the last two years of production. The ZR-1 therefore has no MAF even after Corvette went back to the MAF based system).
03-27-2003, 04:58 PM
#5
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Re: MAf Differences 86-87 & 88-89 (ld85)
all the mafs from 85-89 are interchageable the only difference is part numbers i ran all years :cheers:
