Visual differences between 85-88 and 89-92 tpi setups
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Joined: Jul 2003
Posts: 2,017
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From: Troup, Texas
Car: 1989 Camaro IROC-Z
Engine: ZZZ# 0607 of 1200 produced
Transmission: Pro-Built 700R4/Vig.2400
Axle/Gears: 3.27 BW 9 Bolt PBR Disc
Visual differences between 85-88 and 89-92 tpi setups
I found a tpi setup that I might p/u for a project, but I am weary as to the validity of the sellers statements. He claims it is off a 92 IROC which thew up a red flag for me already. But what I would like to know is if there are things I can look for on the runners, plenum, and what not to indicate whether it is the earlier MAF setup, or the 90-92 SD setup. The lower intake is not included so I will not be able to go on that. Thanks fellas, I appreciate it
Will
Will
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From: Irmo, SC
Car: 1992 Pontiac GTA
Engine: 305TPI
Transmission: 700R4
Axle/Gears: 10-bolt, 2.73
Besides what Vader alluded to, look for the MAP sensor holes on the right side of the plenum. Earlier plenums did not have the holes.
I think I stole this picture from a Hot Rod technical article. I also have one showing the difference between the throttle body openings. The 3 arrow shows the area for the MAP boss on the '90-'92 SD systems.
I think I stole this picture from a Hot Rod technical article. I also have one showing the difference between the throttle body openings. The 3 arrow shows the area for the MAP boss on the '90-'92 SD systems.
Last edited by Jade Grey; Mar 2, 2005 at 01:43 AM.
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