lt1???
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
LT1 is the engine code for the 5.7L engine in 92-96 Corvettes and 93-97 F-bodies.
------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-
------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-
Moderator
Joined: Jan 2000
Posts: 19,660
Likes: 311
AF,
Welcome aboard!
GM commonly uses three-character codes to identify subassemblies and systems in their vehicles. These three-character codes, or "Regular Production Option" codes (RPO codes, for short) are listed on the build sheets that travel along the assembly line with every vehicle. This system has been in use for years, and will likely continue to be used.
Most of these codes are also printed on the RPO label found in the center console or rear cargo storage compartment in ThridGens. Other vehicles have them applied to other areas, but all GM vehicles have an RPO label when they leave the assembly line. the build sheet also contains the other, less common, codes to further identify subassemblies, called "Alpha" codes. These can be found inked or painted on many components, or printed on self adhesive labels. Torque converters, springs, transmissions, fuel tanks, brake master cylinders, differentials, and many other parts that can vary from option to option will have labels. Many of these will have already worn off from a ten year old car, but many will also still be there.
Engines typically have codes that begin with the letter "L". Suspension packages most often use the letter "W", while individual springs use the numbers "6" or "9". Marketing packages often use the letter "Z", and sound systems start with the letter "U". Transmissions are usually "M" codes, and drive axles are often "G" codes.
Because of the RPO codes, most people use that identifier for their engine. The LT1 is a 350 CID, sequential fuel injected V-8. An LB9 was a 305CID, tuned port injected V-8. The 3.1L V-6 most commonly found in earlier ThirdGens was identified as the LH0, while the 2.8L V-6 was an LB8. The L98 was the 350CID version of the TPI V-8.
If you want a fairly complete listing of RPO and Alpha codes used at GM through 1992, check this file:
GM RPO Codes.pdf
You'll need Adobe Acrobat Reader to view and print the file (See Below).
------------------
Later,
Vader
------------------
"Click - Click - BOOM!"
Adobe Acrobat Reader
Welcome aboard!
GM commonly uses three-character codes to identify subassemblies and systems in their vehicles. These three-character codes, or "Regular Production Option" codes (RPO codes, for short) are listed on the build sheets that travel along the assembly line with every vehicle. This system has been in use for years, and will likely continue to be used.
Most of these codes are also printed on the RPO label found in the center console or rear cargo storage compartment in ThridGens. Other vehicles have them applied to other areas, but all GM vehicles have an RPO label when they leave the assembly line. the build sheet also contains the other, less common, codes to further identify subassemblies, called "Alpha" codes. These can be found inked or painted on many components, or printed on self adhesive labels. Torque converters, springs, transmissions, fuel tanks, brake master cylinders, differentials, and many other parts that can vary from option to option will have labels. Many of these will have already worn off from a ten year old car, but many will also still be there.
Engines typically have codes that begin with the letter "L". Suspension packages most often use the letter "W", while individual springs use the numbers "6" or "9". Marketing packages often use the letter "Z", and sound systems start with the letter "U". Transmissions are usually "M" codes, and drive axles are often "G" codes.
Because of the RPO codes, most people use that identifier for their engine. The LT1 is a 350 CID, sequential fuel injected V-8. An LB9 was a 305CID, tuned port injected V-8. The 3.1L V-6 most commonly found in earlier ThirdGens was identified as the LH0, while the 2.8L V-6 was an LB8. The L98 was the 350CID version of the TPI V-8.
If you want a fairly complete listing of RPO and Alpha codes used at GM through 1992, check this file:
GM RPO Codes.pdf
You'll need Adobe Acrobat Reader to view and print the file (See Below).
------------------
Later,
Vader
------------------
"Click - Click - BOOM!"
Adobe Acrobat Reader
Thread
Thread Starter
Forum
Replies
Last Post
88SS6SPEED
Engine/Drivetrain/Suspension Parts for Sale
7
Nov 11, 2015 07:05 AM
