Quote:
Originally Posted by RatRod68
The mileage is extremely respectable considering the weight and aerodynamics of this rig.
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Cost for the swap is ever evolving. My first mistake was starting with a GM Performance Parts MEFI-4 ECM which is the ECM used on RamJet engines and Marine applications. I could never get that system to run right so after running that for over a year I replaced that engine management system with a Howell Harness to move to a MAF system running a GM P59 ECM. The cost for the 8.1L swap was around $1800 including the old MEFI-4 system then later changing it to a P59 as well as the recent change in the air induction piping. Had I started with a Howell Harness in the beginning, the cost would have been about half. I reused all of my old accessories from a 454HO so there was no expense there.
Hehe, my experience with towing with a 6.0L was more like a snail. A few years ago I bought a used beater 2005 2500HD 4x4 bare bones regular cab truck for half of what NADA value was listed at the time. The sole purpose was to fix it and flip it, which I eventually did and made a little money on it. With having both a 6.0L and an 8.1L Silverado at the same time it was easy to compare the two. Both even had the same gear ratio (4:10 and tire diameter but the 6.0L truck was an automatic). I towed a Jeep Grand Cherokee on a car trailer from COS to Pueblo with the 6.0L truck one day. It was a snail that would barely hold overdrive on the highway and drank gas like crazy. It had very little low end grunt where it really didn’t make any usable power until ridiculous high RPMs...unloaded it was a different story, the truck would run circles around the 8.1L Silverado from stop light to stop light. Towing, not so much.
I hear you on the different brackets for the LS, my point was there isn’t any major differences in LS bracketry to move the A/C compressor. The differences between truck, van and car LS engine brackets is pretty small where only the alternator moves a bit.
Check out this cool label my buddy BeamN7 made! He made the artwork then I found a graphic supplier to make the decals. Everybody that sees this has to take a double take
