I had a cousin of mine let one of his Gm techs install my comp 918 springs. I figured it would be Ok since he had been "the man" around here for performance vettes. When I picked up my truck he informed me he had "done me a favor" by updating my computer with all the new updtaes from GM. Needless to say my 8psi STS set up with injectors and fuel pump did NOT like this. I barely made it home. I immediately called Allen @ Nelson perf and he is sending me a new tune. I was planning on getting a retune after the springs, but not this way. Oh well, at least we have good resources..
Sucks to be me!
2013 2wd Z71 6.2 crew cab
Old Truck: '04 Chevy crew cab stroked/bored 6.0 to 408ci. forged internals, patriot 68cc stage 3 heads (11.1:1cr), comp 244/246 .600 115lsa cam, 3000 yank tc, built 4L60E, walbro 255, 60# mototron injectors, pacesetter lt's 4" single no-cat exhaust
best time 12.93 1/4 mi @ 103 in the turbo truck.
1968 Camaro Convertible, super sweet!