North American Turbocoupe Organization



86 questiion
tgriffith360 Offline
Junior Member
#1
Ive got my 86 tore apart and looking at the induction system,,,,,it apears that the air intake system has some type of "flap" with wires ,,,its this some type of early mass air meter,,,,,,is itvery efficent and anyone know exactly how it works
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Pete D Offline
Administrator
#2
It called a VAM - vane air meter. It's a flow meter of sorts but not Mass air. The computer calculates "load" based on the flap opening, the air temp (sensor is on the VAM, TPS position etc. (Thats the simple version) The VAM works like a variable rheostat. The EEC reads return line voltage to know the flap opening
Pete Dunham


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tgriffith360 Offline
Junior Member
#3
any upgrades to change it to a mass air OR are the vam`s a fairly good system,,,,,dont know for sure,,,but they dont look that reliable,,,,,,the biggest complaint I hear from other turbo racers is that,,the cars arent very consistent
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Pete D Offline
Administrator
#4
Several people have converted to MAF. VAM are limited in their rated flow capability. Some people are running blow through on VAMs
Pete Dunham


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tgriffith360 Offline
Junior Member
#5
explain the blow thru on the Vam`s
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turbo86xrseven Offline
Junior Member
#6
The 87-88 turbo t birds had a bigger vam, but to use u must upgrade to the same year ecm
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Pete D Offline
Administrator
#7
Quote:explain the blow thru on the Vam`s
The VAM is relocated after the turbo instead of before the turbo.
Pete Dunham


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tgriffith360 Offline
Junior Member
#8
is this a better way of doing it???? also,,,whay type of computer does the 86 have,,,,Im finding all sorts of stuff for the 87 and up,,,,are the computers 2 completely different critters
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Jeff K Offline
Administrator
#9
87-88 and pre 87 computers are totally different. Pre 87 were 8 MHz processors and had 16K memory, 87-88 are 15 MHz, and 32K memory. Pinouts are somewhat different. EEC, injectors, and VAM must all match.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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tgriffith360 Offline
Junior Member
#10
is an 86 PE computer out of an svo better than the 86 thunderbird,,,,,will it work???
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