Engine Performance + Maintenance

If it's under the hood, its in here.

  1. 96+ Vortec Performance + Computer Swaps

    If you want to do the 0411 PCM swap or have a 1996+ Vortec motor this is your forum!
    805
    Discussions
    9,731
    Messages
    Latest: Vortec 350 Swap Advice badco, Aug 8, 2020 at 7:14 AM

  2. LSX + Carb Swaps

    This section is for info on LSX or carburetor swaps into the OBS trucks.
    414
    Discussions
    5,275
    Messages
    Latest: 91 5.7 Roller engine intermittent knock at idle Hipster, Aug 7, 2020 at 12:01 PM

  3. Exhaust

    Anything exhaust - from headers cats and pipes to tips.
    849
    Discussions
    10,104
    Messages
    Latest: Header bolts Tim W, Aug 8, 2020 at 1:14 AM
Car Parts
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  1. shelbyt.67

    ULTIMATE TBI mods stage 1

    shelbyt.67, Jun 28, 2012 ... 24 25 26
    Replies:
    255
    Views:
    230,217
    badco
    Aug 8, 2020 at 7:18 AM
  2. Mike

    The Stupid Engine Questions Thread

    Mike, Dec 3, 2009 ... 125 126 127
    Replies:
    1,263
    Views:
    195,148
    east302
    Aug 2, 2020 at 9:56 PM
  3. Greg

    GMT400 History

    Greg, Mar 16, 2010 ... 22 23 24
    Replies:
    231
    Views:
    222,689
    Pinger
    Jul 27, 2020
  4. Bighead38

    Putting A Chip In A TBI Truck

    Bighead38, Dec 3, 2009 ... 18 19 20
    Replies:
    191
    Views:
    184,762
    PlayingWithTBI
    Jun 8, 2020
  5. Ginger

    Intake Gasket Replacement

    Ginger, Dec 4, 2009 ... 10 11 12
    Replies:
    115
    Views:
    77,602
    someotherguy
    Jun 6, 2020
  6. Ginger

    Water Pump Relacement

    Ginger, Dec 4, 2009 ... 6 7 8
    Replies:
    77
    Views:
    54,814
    54vicky
    Feb 28, 2020
  7. Greg

    Maintenance: RPO Code Database & Decoder

    Greg, Dec 4, 2009 ... 2 3
    Replies:
    23
    Views:
    29,677
    dAT OBS
    Feb 28, 2020
  8. Devs93

    The Ultimate 88-98 Performance Toolbox

    Devs93, Aug 1, 2012 ... 2 3
    Replies:
    28
    Views:
    150,644
    spolly74
    Feb 26, 2020
  9. monstar_est87

    How to MarkVIII your OBS on a budget..!

    monstar_est87, Apr 30, 2012 ... 15 16 17
    Replies:
    164
    Views:
    110,203
    McBroom
    Dec 26, 2019
  10. supjim12

    Tune Up Parts Numbers

    supjim12, Dec 22, 2009 ... 2 3 4
    Replies:
    34
    Views:
    43,600
    Donald Mitchell
    Dec 26, 2019
  11. Hodges87

    How to Replace oil filter adapter gasket & o-ring

    Hodges87, Dec 14, 2009 ... 3 4 5
    Replies:
    46
    Views:
    120,074
    Chevy blood
    Aug 16, 2018
  12. Mike

    LS Swapping and Performance FAQ

    Mike, Aug 3, 2013
    Replies:
    9
    Views:
    22,316
    Fedeleon11
    Sep 24, 2016
  13. 88GMCtruck

    Engine Oil Cooler Upgrade: Add 2 quarts! (SAS guys you'll want to see this)

    88GMCtruck, Apr 14, 2010 ... 2 3
    Replies:
    21
    Views:
    53,601
    txgp17
    Oct 24, 2013
  1. Godholio

    TBI 454 idle problem

    Godholio, Aug 4, 2020 at 3:38 PM ... 2
    Replies:
    14
    Views:
    313
    RawbDidIt
    Aug 8, 2020 at 3:34 PM
  2. obsguy124

    Truck cranks but doesnt start

    obsguy124, Aug 5, 2020 at 11:05 AM ... 5 6 7
    Replies:
    67
    Views:
    1,220
    Jdoggat22
    Aug 8, 2020 at 12:11 PM
  3. Curt

    ACDelco 2173029 v. ACDelco 19210687

    Curt, Aug 7, 2020 at 8:19 PM ... 2
    Replies:
    10
    Views:
    204
    jaywestfall
    Aug 8, 2020 at 11:58 AM
  4. bcjjones

    Anyone running a 2wd 355 that has dyno?

    bcjjones, Aug 3, 2020 at 7:01 PM ... 2
    Replies:
    12
    Views:
    421
    arrg
    Aug 8, 2020 at 10:19 AM
  5. DeputyPelican

    A/C Help...

    DeputyPelican, Jul 28, 2020 ... 2 3 4
    Replies:
    32
    Views:
    1,192
    man-a-fre
    Aug 8, 2020 at 9:36 AM
  6. DustyRoads

    Found a strange intake modification. Why?

    DustyRoads, Aug 3, 2020 at 3:09 PM
    Replies:
    7
    Views:
    306
    b454rat
    Aug 8, 2020 at 7:08 AM
  7. PlayingWithTBI

    Swapping the Clutch on an R4 A/C Compressor

    PlayingWithTBI, Aug 5, 2020 at 2:31 PM ... 2
    Replies:
    18
    Views:
    310
    PlayingWithTBI
    Aug 7, 2020 at 10:41 PM
  8. eddie7644

    EFI conversion???????

    eddie7644, Aug 6, 2020 at 9:17 PM
    Replies:
    8
    Views:
    277
    b454rat
    Aug 7, 2020 at 6:01 AM
  9. BhutJolokia

    Best Distributor and ones to avoid

    BhutJolokia, Aug 2, 2020 at 11:46 AM ... 2
    Replies:
    17
    Views:
    837
    bobby v
    Aug 6, 2020 at 5:08 PM
  10. Texvet

    UPDATE: Code 33 - no fuel - no start

    Texvet, Aug 1, 2020
    Replies:
    5
    Views:
    223
    Schurkey
    Aug 6, 2020 at 1:35 AM
  11. Guido

    6.2 diesel instruction manual

    Guido, Aug 5, 2020 at 4:37 PM
    Replies:
    0
    Views:
    57
    Guido
    Aug 5, 2020 at 4:37 PM
  12. Pinger

    Vortec 350 PCV positive crankcase ventilation question.

    Pinger, Jul 31, 2020 ... 2 3 4
    Replies:
    33
    Views:
    854
    Pinger
    Aug 5, 2020 at 5:28 AM
  13. Beezil007

    ABS Brake Issues Code 67 and 68 and Spongy brakes

    Beezil007, Aug 3, 2020 at 7:29 PM
    Replies:
    7
    Views:
    183
    delta_p
    Aug 4, 2020 at 9:59 PM
  14. bobby v

    High Temps Solved???? Finally???

    bobby v, Aug 1, 2020
    Replies:
    9
    Views:
    483
    96-2D-Hoe
    Aug 4, 2020 at 3:34 PM
  15. Motorsports-X

    O2 Sensor failover???

    Motorsports-X, Jul 31, 2020 ... 2 3
    Replies:
    21
    Views:
    567
    Motorsports-X
    Aug 3, 2020 at 5:25 PM
Showing threads 1 to 15 of 8,420

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