differences between 89 plenum and 91 plenum ??
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Drifting
Joined: Aug 2000
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From: West Islip New York
differences between 89 plenum and 91 plenum ??
I want to have my plenum ported to use large tube runners with my Accel base. The stock 89 plenum is on the car, and I have a 91 plenum from a friend which I wanted to send out for porting (so I could keep the car on the road).
Both TPIS and Ligenfelter catalogs need the year of the plenum, so when I called, I got different answers from both of them. TPIS said no problem, theres an extra tap for the MAP on the 91 which I could block and use it. Ligenfelter told me I should use the 89 plenum because theres an extra hole under the throttle body on the 89 that I need for the IAC.
Since the 89 plenum is on the car I can't confirm that. On the 91 plenum, there is an additional port on the passenger side that should be what TPIS is speaking of.
Does anybody know of any other differences between these two plenums.
The casting number on the 91 is 10077151 and there is a 91 in stamp on the bottom.
Both TPIS and Ligenfelter catalogs need the year of the plenum, so when I called, I got different answers from both of them. TPIS said no problem, theres an extra tap for the MAP on the 91 which I could block and use it. Ligenfelter told me I should use the 89 plenum because theres an extra hole under the throttle body on the 89 that I need for the IAC.
Since the 89 plenum is on the car I can't confirm that. On the 91 plenum, there is an additional port on the passenger side that should be what TPIS is speaking of.
Does anybody know of any other differences between these two plenums.
The casting number on the 91 is 10077151 and there is a 91 in stamp on the bottom.
