TPI Plenum Differences
01-09-2005, 07:51 PM
#1
Team Owner
Thread Starter
Member Since: Sep 2003
Location: Freedom is never more than one generation away from extinction.
Posts: 20,161
Received 640 Likes
on
444 Posts
St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21-'22-'23-'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-
01-09-2005, 08:57 PM
#2
Race Director
Member Since: Sep 2003
Location: Database Error Indiana
Posts: 16,615
Received 230 Likes
on
162 Posts
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.
01-09-2005, 09:10 PM
#3
Team Owner
Member Since: Dec 2000
Location: SE NY
Posts: 90,675
Likes: 0
Received 300 Likes
on
274 Posts
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.
01-09-2005, 10:40 PM
#4
Drifting
01-09-2005, 11:15 PM
#5
Team Owner
Thread Starter
Member Since: Sep 2003
Location: Freedom is never more than one generation away from extinction.
Posts: 20,161
Received 640 Likes
on
444 Posts
St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21-'22-'23-'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; 01-09-2005 at 11:19 PM.
