| PROJECT: TBMSport SILVERADO RS (GMT800 6L80) |
BECAUSE YOUR POLL RESULTS ASKED FOR IT!
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| With nearly 400K under its rust free South Carolina belt, our 2WD, fully loaded, 1999 Chevy Silverado LT with 5.3L and 4L60E was showing its age. She drank oil as much as she consumed gas. Sometime shortly before we got her someone treated her to a reman'd transmission. But after 2 fuel pumps gave up the ghost and rendered her immobile for over a year, it was time to bring her to the forefront of the project list and treat her to some TLC, TBM-style.
Project direction include either Boosted 4.8L or tweeked LS2 to compliment the 6L80. As soon as Project GTO-X 3.0 is done, get ready for Project Silverado RS.
Stay tuned!
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UPDATE: 10/1/2019 This project has been heartbreaking. Intended to give a nearly 400k mile clean, rust free SC work truck a new lease on life as a performance vehicle, sadly another commissioned shop screwed us over. The goal was simple. Replace the tired LM7 5.3l with a 2000 LQ4 6.0. Add a TBSS intake manifold, CAI, 50lb injectors, and shorty headers to the already installed dual exhaust, and would be ready to have fun. But no. The shop who did the engine swap failed to inform us that the brakes were shot and the whole front suspension, including steering rack, was not going to pass inspection. So, we had to retro repair all of that once we got the No-Go from the state inspector. A few hundred miles of tuning later and the junkyard LQ4 decided to drop a cylinder. Engine is in teardown to determine if it's a press-fit wrist pin that worked out or the connecting rods bolts.
Either way, we have new flat top pistons, full floating rods, and 1.9 rocker arms at the ready to turn this into an iron block LS2 that will eat up that reman'd 4L60 transmission. Which is also ok, bc that means the lonely 6L80 in the corner that is itching to go in will have its day.
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