TPI Plenum Differences
Thread Starter
Team Owner
Joined: Sep 2003
Posts: 20,179
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From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
TPI Plenum Differences
I'm trying to determine how the early TPI plenum (MAF) differs from the SD plenum. Side by side, the two parts appear to be the same.
Anyone have any clues?
-JRC-
Anyone have any clues?
-JRC-
Race Director
Joined: Sep 2003
Posts: 16,838
Likes: 341
From: Database Error Indiana
Saw pics on here one time that showed a difference in the vacuum ports, the ones above injectors 6&8, and map cars have the map sensor in that area. Not sure of any differences that would really matter.
Team Owner
Joined: Dec 2000
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From: SE NY
Cruise-In II Veteran
The '89-'91 L98 use a simplified plenum style whereas the '85-'88 plenum have a cold start passage under the plenum front left side and a diamond shaped EGR opening in the front center below the two TB openings.
In addition the '90-'91 plenum has a hole in the right rear for the MAP sensor.
In addition the '90-'91 plenum has a hole in the right rear for the MAP sensor.
Drifting
Joined: Jul 2002
Posts: 1,488
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From: Frostburg MD
Thread Starter
Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Originally Posted by shotchkiss
Pics in the middle of this page http://www.hotrodlane.cc/Streetstories/choosingtpi2.htm
Thanks for the link shotchkiss!!!!!!
-JRC-
Last edited by JrRifleCoach; Jan 9, 2005 at 11:19 PM.
