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Engine Performance + Maintenance
If it's under the hood, its in here.
96+ Vortec Performance + Computer Swaps
If you want to do the 0411 PCM swap or have a 1996+ Vortec motor this is your forum!
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99 L29 454 build
9 minutes ago
Keeper
LSX + Carb Swaps
This section is for info on LSX or carburetor swaps into the OBS trucks.
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634
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7.9K
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634
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T
How To: Ditch EFI and keep TBI PCM for 4L60E Control.
Today at 2:04 PM
tayto
Exhaust
Anything exhaust - from headers cats and pipes to tips.
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E
Long tube headers
Today at 12:14 PM
EKOBS
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Sticky
The Stupid Engine Questions Thread
Mike
Dec 3, 2009
207
208
209
Replies
2K
Views
370K
Sunday at 4:14 PM
FighterOfTheFoo
S
Sticky
ULTIMATE TBI mods stage 1
shelbyt.67
Jun 28, 2012
26
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28
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273
Views
328K
May 5, 2022
PlayingWithTBI
Sticky
GMT400 History
Greg
Mar 16, 2010
23
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25
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245
Views
327K
Feb 27, 2023
Will Fuller
W
Sticky
Putting A Chip In A TBI Truck
Bighead38
Dec 3, 2009
19
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21
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202
Views
295K
Jul 10, 2023
mwilliams55555
D
Sticky
The Ultimate 88-98 Performance Toolbox
Devs93
Aug 1, 2012
2
3
4
Replies
35
Views
250K
Mar 12, 2023
jpcedotal
Sticky
88-98 Service Manuals
hatzie
Dec 15, 2018
13
14
15
Replies
144
Views
244K
Apr 20, 2024
BeautyandtheBeast
Sticky
How to Replace oil filter adapter gasket & o-ring
Hodges87
Dec 14, 2009
4
5
6
Replies
55
Views
159K
Jun 20, 2023
Illbedipped
Sticky
How to MarkVIII your OBS on a budget..!
monstar_est87
Apr 30, 2012
16
17
18
Replies
171
Views
145K
Sep 23, 2023
Casey916
Sticky
Intake Gasket Replacement
Ginger
Dec 4, 2009
11
12
13
Replies
124
Views
120K
Dec 9, 2022
mary7654
M
Sticky
Water Pump Relacement
Ginger
Dec 4, 2009
7
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9
Replies
86
Views
85K
Jun 7, 2021
HotWheelsBurban
Sticky
How to Put a Vortec Motor in a TBI Truck
Erik the Awful
Jun 17, 2020
10
11
12
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113
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74K
Mar 26, 2024
rebelyell
R
Sticky
Engine Oil Cooler Upgrade: Add 2 quarts! (SAS guys you'll want to see this)
88GMCtruck
Apr 14, 2010
2
3
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28
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73K
Dec 27, 2023
pgutier1
S
Sticky
Tune Up Parts Numbers
supjim12
Dec 22, 2009
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4
Replies
37
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65K
May 15, 2022
Erik the Awful
Sticky
Maintenance: RPO Code Database & Decoder
Greg
Dec 4, 2009
2
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33
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50K
Jul 3, 2023
GoToGuy
Sticky
GMT400 - Community Scan Tool
studigggs
Jan 9, 2023
30
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314
Views
33K
Wednesday at 11:07 AM
Bob2650
B
Sticky
TBI small block intake gasket replacement (PIC HEAVY)
someotherguy
Dec 25, 2022
3
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5
Replies
41
Views
13K
Feb 16, 2024
95OBSMan
Sticky
Let's get connected!!!
Scooterwrench
Oct 1, 2023
4
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59
Views
6K
Apr 1, 2024
Scooterwrench
R
TBI on a dual plane Manifold??
racprops
May 21, 2020
2
3
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26
Views
383K
Sep 8, 2020
Erik the Awful
Delete Oil Cooler lines?
Old77
Nov 29, 2014
3
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5
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43
Views
161K
Jan 4, 2021
Ruger_556
Setting distributor timing without $$$$ scan tool? 1999 5.7 Suburban
redfishsc
Jan 15, 2017
2
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35
Views
157K
Mar 15, 2022
454cid
EGR Delete - Will I benefit?
Nathaniel2g
Nov 9, 2017
6
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8
Replies
72
Views
155K
Mar 22, 2024
L31MaxExpress
can ya remove egr on an 88 tbi w/o working on the computer?
Swims350
May 19, 2010
6
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77
Views
139K
Jun 7, 2021
fixit
F
5.7 vortec which Programmer to buy?
AJKZ71
Dec 26, 2011
2
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21
Views
135K
Jan 28, 2012
Tempted
Torque Specs Thread
SkyHighColorado
Feb 16, 2014
2
3
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22
Views
122K
Jul 7, 2021
df2x4
CODE 44 - Lean Exhaust? Low oxygen sensor voltage..350 TBI code
Southern Pride
Aug 14, 2011
5
6
7
Replies
62
Views
121K
Aug 27, 2011
Swaggerwagon
How much fuel pressure for a 5.7 vortec?
Fast 95
Mar 24, 2010
2
Replies
16
Views
117K
Mar 26, 2010
RSTahoe99
R
5.7L Cold Air Intakes?
flyboy1294
Jul 29, 2011
5
6
7
Replies
66
Views
116K
Sep 20, 2023
ccreddell
replace clutch fan with Electric fan
94chevy4x4
Oct 9, 2010
11
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13
Replies
123
Views
113K
Mar 11, 2015
EmeraldGreenVortec
"Engine Swap"... Vortec 4.3L V6 to Vortec 5.7L V8
severedchris
Feb 22, 2012
2
3
Replies
25
Views
112K
Oct 4, 2023
jasonhyde28
J
turbo kit for my 91 tbi 350?
superninja427
Feb 9, 2012
2
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4
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32
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107K
Apr 1, 2012
stevehayes01
S
V
Poll
What kind of mileage do you get?
Vortec Lover
Oct 10, 2012
99
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1K
Views
106K
May 10, 2017
DerekTheGreat
My documented TBI-to-Vortec 350 conversion!
jdyates
Jun 21, 2013
23
24
25
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242
Views
104K
Nov 26, 2023
jdyates
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