2015 Chevrolet Silverado 5.3 4x4 - L8T Swap - Custom Dyno Tune

2015 Chevrolet Silverado 5.3 4x4
The goal of this project was to get a little more towing power out of this 5.3 based ½ ton.
We explored multiple options from Headers, Cam Packages, Positive Displacement Blowers, 6.2 Engine Swaps Etc. When pricing and planning the 6.6 L8T crate motor from GM was the most attractive.
From a cost perspective it actually works out to be the best option and here is why:
OEM Crate Motor 3 Year/ 36 k Mile Warranty - GM Nationwide
Runs On 87 Octane
Displacement - Displacement - Displacement - NON DOD/AFM from GM
As Much TQ as the LT1
No Core Charge - Gives you the Ability to Sell your Long block - Intake to Oil Pan
Best of all this thing produces gobs of TQ!
This truck baselined at:
282 RWHP & 340 RWTQ SAE
With the 6.6 it produced:
340 RWHP & 462 RWTQ SAE
This Combo Picked up 58 RWHP and 122 RWTQ SAE in a full factory 5.3 exhaust!
We couple this with OEM Reliability, Warranty, and now the TQ to Tow and the Power to GO all while using 87 Octane!
#lmdmafia #latemodeldomestics #mustangdyno #hptuners #virginiabeach #virginia #silverado #l8t

[@Ilovegirlfights2]

How involved was this conversion? Mounts ? Any cutting?

[@latemodeldomestics6153]

Standard swap - few sensors that need rewiring - fuel system harness - we utilized the 5.3 accessories

[@optimuscrime608]

So the factory 6.6 L8T picked up that much more power with an exhaust change?

[@latemodeldomestics6153]

@@optimuscrime608yes / this has the full factory exhaust on 87 octane. We are finishing another one next week that will
Use 93 octane and has long tube headers / check that one out when we post.

[@thegonz7833]

5.3 to 6.6 122 RWTQ. gain with cubic inches and tune only.