HT4100 4.1, 4.5, 4.9
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HT4100 4.1, 4.5, 4.9 in Cadillac forums : Cadillac Owners Forum, This forum is to discuss the newer aluminum block Cadillac engines.
  1. Sticky Thread Sticky: The "4.9 liter turbocharger, stage 1" thread.

    Started by illumina‎, 03-12-05 12:05 AM
    16 Pages
    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
    • Replies: 238
    • Views: 92,615
    02-24-11, 01:56 PM Go to last post
  2. Sticky Thread Sticky: Safety Safety Safety !

    Started by Stoneage_Caddy‎, 06-11-04 06:53 PM
    3 Pages
    1 2 3
    • Replies: 34
    • Views: 13,806
    12-15-13, 10:54 AM Go to last post
  3. Sticky Thread Sticky: OBD I codes for 4.x Engines

    Started by DaveSmed‎, 09-20-04 01:50 AM
    • Replies: 0
    • Views: 42,601
    09-20-04, 01:50 AM Go to last post
  1. I'm going to try the 4.1->4.9 conversion

    Started by ehall‎, 01-13-08 01:49 AM
    11 Pages
    1 2 3 4 5 6 7 8 9 10 11
    • Replies: 151
    • Views: 16,368
    09-19-11, 04:42 PM Go to last post
  2. 1992 DeVille Misfiring, or something.

    Started by Mahalaleel‎, 02-13-05 10:44 PM
    7 Pages
    1 2 3 4 5 6 7
    • Replies: 103
    • Views: 7,467
    12-15-05, 10:47 PM Go to last post
  3. Talking 4.1vs4.9

    Started by kdaddy‎, 10-20-04 12:46 PM
    7 Pages
    1 2 3 4 5 6 7
    • Replies: 94
    • Views: 3,308
    01-19-05, 11:21 PM Go to last post
  4. Power improvement... from a carburator?

    Started by Night Wolf‎, 01-16-06 05:07 PM
    7 Pages
    1 2 3 4 5 6 7
    • Replies: 93
    • Views: 6,189
    01-24-06, 11:59 AM Go to last post
    • Replies: 89
    • Views: 2,338
    01-27-06, 02:11 AM Go to last post
  5. 4.9 cadillac external upgrades

    Started by illumina‎, 04-07-04 01:26 PM
    6 Pages
    1 2 3 4 5 6
    • Replies: 84
    • Views: 5,948
    05-11-04, 04:25 PM Go to last post
  6. Mobil 1 Extended Performance? BBob!

    Started by 99Zee28‎, 02-22-05 05:15 PM
    6 Pages
    1 2 3 4 5 6
    • Replies: 84
    • Views: 8,589
    11-30-05, 03:42 PM Go to last post
  7. 4.1 vs 4.9

    Started by Stoneage_Caddy‎, 01-12-05 09:36 PM
    6 Pages
    1 2 3 4 5 6
    • Replies: 83
    • Views: 5,640
    01-16-06, 12:19 AM Go to last post
    • Replies: 80
    • Views: 9,880
    10-08-13, 09:05 PM Go to last post
  8. 4.9 Potential? (Split from "4.9 to a 5.0?")

    Started by bbbnickledimer‎, 09-29-06 09:20 PM
    6 Pages
    1 2 3 4 5 6
    • Replies: 79
    • Views: 3,156
    11-20-06, 04:16 PM Go to last post
  9. Extra HP & Torque

    Started by Sporty883‎, 01-07-09 02:57 PM
    6 Pages
    1 2 3 4 5 6
    • Replies: 79
    • Views: 6,318
    06-24-09, 01:20 PM Go to last post
  10. Cone Filter & Cold Air Intake

    Started by 92EldoTC‎, 07-05-06 10:36 PM
    6 Pages
    1 2 3 4 5 6
    • Replies: 77
    • Views: 5,829
    09-12-06, 12:41 PM Go to last post
  11. 4.9 performance

    Started by Night Wolf‎, 05-21-03 05:49 PM
    6 Pages
    1 2 3 4 5 6
    • Replies: 76
    • Views: 14,525
    04-02-04, 04:16 PM Go to last post
  12. HT4100 Check In

    Started by caddeville‎, 06-07-06 03:03 PM
    5 Pages
    1 2 3 4 5
    • Replies: 74
    • Views: 11,305
    02-23-10, 11:51 PM Go to last post
  13. Engine Swap Process

    Started by Cristofo‎, 03-07-11 09:06 PM
    5 Pages
    1 2 3 4 5
    • Replies: 74
    • Views: 4,157
    04-06-11, 03:14 PM Go to last post
  14. Stoneys Main Bearing Diary

    Started by Stoneage_Caddy‎, 12-03-05 04:58 PM
    5 Pages
    1 2 3 4 5
    • Replies: 73
    • Views: 3,636
    HUF
    12-20-05, 01:23 PM Go to last post
  15. Fuel Injectors 94 Deville 4.9L

    Started by Cadillac_Scout‎, 04-01-05 10:41 AM
    5 Pages
    1 2 3 4 5
    • Replies: 72
    • Views: 7,917
    07-29-12, 12:34 AM Go to last post
  16. chugging and backfiring intermittently. No codes

    Started by red_ghost‎, 04-22-10 09:25 AM
    5 Pages
    1 2 3 4 5
    • Replies: 70
    • Views: 7,915
    09-21-10, 10:56 AM Go to last post
  17. My engine build up

    Started by red_ghost‎, 01-16-09 11:42 AM
    5 Pages
    1 2 3 4 5
    • Replies: 68
    • Views: 7,637
    05-28-09, 09:04 AM Go to last post
  18. 4.1,4.5,4.9..Which You Prefer?

    Started by JoJo_Brand_Star‎, 11-28-09 12:44 PM
    5 Pages
    1 2 3 4 5
    • Replies: 65
    • Views: 5,488
    04-26-11, 04:21 AM Go to last post
  19. e23 and e27

    Started by Reverend Hearse‎, 10-24-10 11:42 AM
    5 Pages
    1 2 3 4 5
    • Replies: 65
    • Views: 5,308
    01-21-11, 05:43 PM Go to last post
  20. 4.9 Will Not Idle Below 2500rpm!

    Started by skor‎, 07-02-07 04:30 PM
    5 Pages
    1 2 3 4 5
    • Replies: 63
    • Views: 5,954
    01-02-11, 02:36 PM Go to last post
  21. Spark Plugs: What do YOU run?

    Started by Sevillian273‎, 02-18-10 10:27 PM
    5 Pages
    1 2 3 4 5
    • Replies: 62
    • Views: 6,313
    03-16-13, 11:23 PM Go to last post
  22. Your best 4.X MPG?

    Started by drewsdeville‎, 07-06-09 03:49 PM
    4 Pages
    1 2 3 4
    • Replies: 59
    • Views: 3,395
    09-04-09, 09:23 AM Go to last post
  23. Idle Relearn Debate

    Started by cadillactech‎, 02-01-05 09:54 PM
    4 Pages
    1 2 3 4
    • Replies: 56
    • Views: 4,812
    02-06-05, 05:43 PM Go to last post

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