LD8 and L37?
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
Results 1 to 5 of 5
Northstar Engines and System Technical Discussion Discussion, LD8 and L37? in Cadillac Engine Technical Discussion; Which is the 300hp and which is not?...
  1. #1
    Devil_concours is offline Cadillac Owners Connoisseur
    Join Date
    Jan 2003
    Location
    Alexandria, VA
    Age
    32
    Posts
    3,684

    LD8 and L37?

    Which is the 300hp and which is not?

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Dutch is offline Cadillac Owners Member
    Join Date
    Jan 2003
    Location
    Detroit, Michigan
    Posts
    6
    The L37 is rated at 295/300 depending on the year. The LD8 is rated at 270/275 and has more low end torque. I think the difference is mainly in the cams.

  4. #3
    Devil_concours is offline Cadillac Owners Connoisseur
    Join Date
    Jan 2003
    Location
    Alexandria, VA
    Age
    32
    Posts
    3,684
    Thread Starter
    Thank you

  5. #4
    kd4awq is offline Cadillac Owners Member
    Join Date
    Feb 2003
    Location
    Louisville, Kentucky
    Age
    53
    Posts
    2
    Strangely, the two engines have slightly different displacements. Maybe the cylinder heads are different?

  6. #5
    jadcock's Avatar
    jadcock is offline Cadillac Owners Connoisseur
    Automobile(s): White Diamond 2001 STS
    Join Date
    Jan 2003
    Location
    North Carolina
    Age
    35
    Posts
    1,320
    This is not true. Cylinder heads are the same. The only difference between the two, mechanically, are the intake camshafts (higher lift on the L37) and with the earlier engines, stiffer valve springs for the L37. Apparently, starting in mid 1996, all engines began to use the stiffer valve springs.

    There is no change in displacement. Engines are exactly the same except for what's mentioned above. Any discrepancy is a typographical error in what you read.

    Displacement is a function of crankshaft stroke and cylinder bore. The COMPRESSION RATIO is slightly different between a 1999 Northstar and a 2000 Northstar because in 2000, the heads were redesigned to recommend 87 octane fuel. I think the compression ratio went from 10.3 in 1999 (for both the L37 and LD8) to 10.0 in 2000 (again, for both the L37 and LD8). Changes made for 2000 are across the board and again, the only difference between the two engines is the intake cam profile.

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