i have been flip flopping back and forth between just dropping another 5.3 back in or going up to a 6.0. and the reason is because i dont plan on modding whatever i get too much. so if thats the idea why not put a 8.1 in? i see tehm going for the same thing 6.0's go for. and they make tremendous torque. in a 1500 it would be nasty wouldnt it. its probably not a straight swap is it? probably need motor mounts at least. so whats the deal on the BB would the wiring not even be the same?
2008 Trailblazer SS LS2, K&N CAI, flowmaster 40 series, hp tuned
2004 Trailblazer 4.2, K&N CAI, hp tuned
2002 Camaro Z28 5.7 ls1, lid, slp loudmouth, bbk longtube headers, ory, hp tuned, tr224 cam, ported 243 heads, moser 12 bolt w/ 3.73's and full spool, and a 100 shot just in case. 463whp, 458 wtq 11.32@ 120 1.52 60' on motor no spray times yet
i'm right there with ya bro 8.1! but at 7mpg ouch!
2009 CHEVROLET 1500 with a MONSTER 4.8 between the frame rails!!
Tuned by LSX Powersports ~ 4.10 ~ JBA Shorties ~ 4" Inlet/Outlet Spintech ~ Airaid Coldair
CST 3.5" Spindles ~ Camburg Upper Control Arms ~ 2.5" CCM ~ FFR Tie Rods
Full Throttle Suspension 3" Lift Blocks ~ Soft 8s wrapped in LT285/70/17 Silent Armors
maybe in a 1500 but i rode in a 8.1 in a duellie with an big exhaust kit and a few other goodies and i got too tell ya ,when i had a stock 4.8 in my truck it would of walked it ,it felt doggy to me.but also consider i believe that thay probably weigh quite a bit more ,im not sure how much.i think id still go 6.0 especially cause everyone on her mods the crap out of them and you can get alot of hands on expierience from us guys, were im not so sure i hear much 8.1 talk.just a thought
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
I'd do a 502 long before an 8.1. It may be tough to pass an emissions test with one but the 8.1 is a dog an when was the last time you saw any performance parts for one?
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
im with red fo sho!Originally Posted by RedHeartbeat
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
MONEY PIT !LOL
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
6.0 + cam and be done with it.
Gone, but not forgotten!
easy for you to say you have a 408!lol
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
Speaking from experience.
I should have kept the Procharger and built a forged 370.
In hind sight, I should have left it stock...but where is the fun in that???
Gone, but not forgotten!
Try to get a 6.0L, but don't wait around too long. If nothing decent shows up, just get a 5.3L. Since you already have a 5.3L with a bunch of mods, it might be better for you if you go with a 5.3L again. But a big Hell No the the 8.1L. If you plan on staying N/A, do a forged 370... I am with SC on this!
2000 ECSB 6.0L
TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's
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