What's the difference between the LT1 and Vortec 350? - Page 2
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Page 2 of 2 FirstFirst 1 2
Results 16 to 22 of 22
5.0 and 5.7 Discussion, What's the difference between the LT1 and Vortec 350? in Cadillac Engine Technical Discussion; A guy on the FullSizeChevy forums just dynoed his L29 454, we are all quite dissappointed in the numbers though. ...
  1. #16
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
    Join Date
    Aug 2004
    Location
    Rockford, IL
    Age
    47
    Posts
    7,490

    Re: What's the difference between the LT1 and Vortec 350?

    A guy on the FullSizeChevy forums just dynoed his L29 454, we are all quite dissappointed in the numbers though.

    stock 252.3 rwhp 380.5 rwtq
    tune 258.2 rwhp 386 rwtq
    tune and intake 260.4 rwhp 389 rwtq

    We expected at least 290-300 rwhp tuned. This was a stickshift truck that was tested.

    http://www.fullsizechevy.com/forums/...42#post2514942

  2. #17
    I~LUV~Caddys8792's Avatar
    I~LUV~Caddys8792 is offline Moderator
    Automobile(s): 1992 Town Car Cartier & 2014 Accord LX MTX
    Join Date
    Dec 2004
    Location
    Roseville, MN.
    Age
    27
    Posts
    34,087

    Re: What's the difference between the LT1 and Vortec 350?

    Stick 7.4L K2500? Wow, never seen a 5 speed 454!
    "They call Alabama the Crimson Tide, call me Deacon Blues."

    Current:
    1992 Lincoln Town Car Cartier Edition (5/14- ?)
    2014 Honda Accord LX MTX Sedan (1/14 -?)

    Past:
    1995 Buick Roadmaster Limited (4/04-12/04)
    1992 Cadillac Sedan deVille (12/04-9/07)
    1999 Mercedes Benz S320 (8/07-7/09)
    2000 Buick Regal GS (7/09-4/12)
    2003 Mercury Marauder (4/12-10/13)
    1991 Buick LeSabre Custom Sedan (9/12-6/13)
    2013 Honda Accord LX Sedan (6/13-1/14)

  3. #18
    I~LUV~Caddys8792's Avatar
    I~LUV~Caddys8792 is offline Moderator
    Automobile(s): 1992 Town Car Cartier & 2014 Accord LX MTX
    Join Date
    Dec 2004
    Location
    Roseville, MN.
    Age
    27
    Posts
    34,087

    Re: What's the difference between the LT1 and Vortec 350?

    I still gotta wonder why they made the Vortec 5.7 and LT1 at the same time.
    "They call Alabama the Crimson Tide, call me Deacon Blues."

    Current:
    1992 Lincoln Town Car Cartier Edition (5/14- ?)
    2014 Honda Accord LX MTX Sedan (1/14 -?)

    Past:
    1995 Buick Roadmaster Limited (4/04-12/04)
    1992 Cadillac Sedan deVille (12/04-9/07)
    1999 Mercedes Benz S320 (8/07-7/09)
    2000 Buick Regal GS (7/09-4/12)
    2003 Mercury Marauder (4/12-10/13)
    1991 Buick LeSabre Custom Sedan (9/12-6/13)
    2013 Honda Accord LX Sedan (6/13-1/14)

  4. #19
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
    Join Date
    Aug 2004
    Location
    Rockford, IL
    Age
    47
    Posts
    7,490

    Re: What's the difference between the LT1 and Vortec 350?

    The LT1 came first, the Vortec was the cost reduced. The LT1 was already emissions certified in the B/D Body, and being the Vortec didn't come out until 1996, the B/D was on its death bed by then, so not worth the $ recertifying emissions all over again. AND who would want to buy a Cadillac with a TRUCK engine? Just sounds like the old 366's that they used to use in the medium duty trucks in the late 60's early 70's that were so loud and weak.

    I think it was simply cost.

    Yup, the C/K3500's were somewhat common with 5 speeds.

  5. #20
    I~LUV~Caddys8792's Avatar
    I~LUV~Caddys8792 is offline Moderator
    Automobile(s): 1992 Town Car Cartier & 2014 Accord LX MTX
    Join Date
    Dec 2004
    Location
    Roseville, MN.
    Age
    27
    Posts
    34,087

    Re: What's the difference between the LT1 and Vortec 350?

    Ah, that makes sense. But then why didn't GM put the LT1 in the trucks when they introduced it in '92?
    "They call Alabama the Crimson Tide, call me Deacon Blues."

    Current:
    1992 Lincoln Town Car Cartier Edition (5/14- ?)
    2014 Honda Accord LX MTX Sedan (1/14 -?)

    Past:
    1995 Buick Roadmaster Limited (4/04-12/04)
    1992 Cadillac Sedan deVille (12/04-9/07)
    1999 Mercedes Benz S320 (8/07-7/09)
    2000 Buick Regal GS (7/09-4/12)
    2003 Mercury Marauder (4/12-10/13)
    1991 Buick LeSabre Custom Sedan (9/12-6/13)
    2013 Honda Accord LX Sedan (6/13-1/14)

  6. #21
    N0DIH's Avatar
    N0DIH is offline Cadillac Owners Master
    Automobile(s): 94 Fleetwood Brougham
    Join Date
    Aug 2004
    Location
    Rockford, IL
    Age
    47
    Posts
    7,490

    Re: What's the difference between the LT1 and Vortec 350?

    From what I can guess, the L03/L05 was fairly new at the time, and they probably had a lot of $$ tied up in tooling (tooling=millions of $$, it is a BIG deal) so they probably had to get a min quantity of parts out of it. Being the L05 and Vortec 350 are probably the same, there isn't much there, but in the heads and intakes, there is.

    And the LT1 was not emissions certified in the truck, and likely the short runners weren't quite what the trucks want for low end power. And more importantly it was an expensive engine compared to the L05 and soon to come Vortec 350. But they probably hadn't planned on the Vortec until 1993, at latest, 1994. They have to tool up, and then start to build up, get protos out to validate reliability, power, emissions, etc. So probably the work started in 1992 would be my guess. And being the LT1 had already had some awesome heads, so likley the team that did those heads probably did the Vortec heads, and they had some tall shoes to fill for power.

    Again, all a guess, but being I work in Engineering, I see it on a daily basis. I see teams do new programs (what I work) and teams doing refresh programs, and then platform teams doing all new stuff that is for future designs.

    I am sure GM works much in the same way....

  7. #22
    I~LUV~Caddys8792's Avatar
    I~LUV~Caddys8792 is offline Moderator
    Automobile(s): 1992 Town Car Cartier & 2014 Accord LX MTX
    Join Date
    Dec 2004
    Location
    Roseville, MN.
    Age
    27
    Posts
    34,087

    Re: What's the difference between the LT1 and Vortec 350?

    That makes logical sense, and I love logic.
    "They call Alabama the Crimson Tide, call me Deacon Blues."

    Current:
    1992 Lincoln Town Car Cartier Edition (5/14- ?)
    2014 Honda Accord LX MTX Sedan (1/14 -?)

    Past:
    1995 Buick Roadmaster Limited (4/04-12/04)
    1992 Cadillac Sedan deVille (12/04-9/07)
    1999 Mercedes Benz S320 (8/07-7/09)
    2000 Buick Regal GS (7/09-4/12)
    2003 Mercury Marauder (4/12-10/13)
    1991 Buick LeSabre Custom Sedan (9/12-6/13)
    2013 Honda Accord LX Sedan (6/13-1/14)

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting