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u/Low-Concern-5905

r/GMT900 r/ChevyTahoe
Image 1 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 2 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 3 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 4 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 5 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 6 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 7 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 8 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 9 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 10 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 11 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 12 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 13 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 14 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 15 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 16 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 17 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
Image 18 — 2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.
▲ 142 r/GMT900+1 crossposts

2011 Z71_215k mile 5.3 pulled for a new 383 and DOD delete kit.

Lifters starting failing so I swapped for a 383

Texas Speed 383 CID forged-iron short block
TSP 4340 Forged crankshaft
TSP H-beam forged connecting rods
Wiseco forged pistons/rings — 3cc
Melling 10355 performance oil pump
IWIS timing chain
LS2 chain damper
TSP Stage 2 truck cam
212° / 218° duration
.600” / .600” lift
PAC 1219 beehive valve springs
.625” maximum lift capability
Johnson Racing slow-leakdown link-bar lifters
Johnson lifter trays
Upgraded pushrods
CHE rocker-arm trunnion upgrade
new 6L80 transmission
Circle D billet torque converter_1,800–2,200 RPM stall
Heavy-duty 40k transmission cooling
OEM head, headers and exhaust

Performance dyno tune

🔴 Previous run: 254.8 WHP / 283.1 WTQ.
215k mile 5.3 before tune
🔵 Previous run: 262.8 WHP / 290.3 WTQ
215k mile 5.3 after tune
🟢 TSP 383: 317.7 WHP / 356.1 WTQ
383 peak torque: 356 WTQ @ ~4,070 RPM
383 peak power: 318 WHP @ ~5,320 RPM

Using an ~18% drivetrain-loss estimate, that puts the 383 around 387 HP / 434 lb-ft at the crank.

Now ready for a supercharger

u/Low-Concern-5905 — 5 days ago
▲ 65 r/ChevyTahoe

208k miles 2011_Z71 Fully Loaded

Got my hoe back yesterday with new 6L80 trans, Circle D Billet Torque Converter and 40k trans cooler. Super tuned to delete the AFM and delay the gear shift a bit for better acceleration.

I will hard delete the AFM next year with new lifters etc. Needed to replace trans first cause it was original and going out.

Trans is the most recent work done that followed a full suspension replacement with leveling kit, loaded struts, ball joints, rear shocks, tie rods, sway bar links, brakes and rotors, motor mounts, driver side header, exhaust manifold, fuel pump, EVAP system, battery, radiator, alternator, new dash (cause you know it cracked) and new rubbers all the way around the doors.

Now it’s time for new shoes to fill in the wheel well a bit.

Drives like a dream!

u/Low-Concern-5905 — 4 months ago