performance suggestions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davecarney2 · 04-27-2013, 04:36 PM

I have a 2003 6.0 out of a 2003 SS Silverado and a 4L80E trans. Any performance suggestions I should do prior to installing it. The engine has 80K on it and the trans has 107K on it. Think I should have em freshened up a little prior to install or just get it on the road for now? I know I wont be the fastest so not worried about big HP #'s jsut would like a good sounding engine with 350-400hp in my 59' This engine is supposed to be 345 so the hp isnt bad just not sure if I should put a thumper cam or something in it. Any suggestions would be appreciated.

BR3W CITY · 04-27-2013, 06:28 PM

4l80e's are pretty stout, and unless there is some obvious mechanical defect, I'd leave it alone for a "driver". Might not be a bad idea to get a better stall convertor (suited to your needs and the cam you choose) just to get a little more performance out of whats there.

With 80k on the engine (again assuming there are no obvious mechanical problems), I'd just put a new oil pump and timing chain kit on it, do whatever cam you wanted, and you'll need a new set of exhaust manifolds since the truck manifolds don't fit between the rails and motor mounts on these older trucks. That will be enough to get you on the road safely and pretty reliably.

Custom 68 · 04-27-2013, 09:58 PM

These motors like a cam change. Get that and a good tune and you will be set.
Posted via Mobile Device

davecarney2 · 04-27-2013, 10:07 PM

Any idea what they did different to get the 50 extra hp for the trailblazer SS v/s the Silverado SS???
Posted via Mobile Device

Super73 · 04-27-2013, 10:42 PM

Yes, they use an LS2 block which has a bit more compression paired with LS6 heads and LS6 cam. Not to mention a better intake and throttle body.
Posted via Mobile Device

1969x11 · 04-28-2013, 09:59 AM

Mid 220 to 230 duration cam, valve springs matched for cam lift , hardned pushrods. Circle-d budget 278mm 4l80e converter.Should get you around 375rwhp with a good tune.

**truckdude239** · 04-28-2013, 11:03 AM

MKe sure you have the torque management turned off in the computer
Posted via Mobile Device

davecarney2 · 04-29-2013, 07:45 AM

thanks guys

Wasted Income · 04-29-2013, 11:19 AM

Lots of good info from the guys in this thread.

I built this car for my brother last year.

LQ4 / 4L80E
228/230, .571"/.573" - 112 LSA
317 Heads
LS6 Intake
Longtubes with dual 3"
Revmax 9.5" 3400 stall, 3.42 rear gear
EFI Live Speed Density tune by me
150 shot of spray

536 to the wheels.

LSX Monte SS - 536 RWHP

04-27-2013, 04:36 PM	#1
davecarney2 Registered User Join Date: Jun 2012 Location: Catawba NC Posts: 230	performance suggestions I have a 2003 6.0 out of a 2003 SS Silverado and a 4L80E trans. Any performance suggestions I should do prior to installing it. The engine has 80K on it and the trans has 107K on it. Think I should have em freshened up a little prior to install or just get it on the road for now? I know I wont be the fastest so not worried about big HP #'s jsut would like a good sounding engine with 350-400hp in my 59' This engine is supposed to be 345 so the hp isnt bad just not sure if I should put a thumper cam or something in it. Any suggestions would be appreciated.

04-27-2013, 06:28 PM	#2
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: performance suggestions 4l80e's are pretty stout, and unless there is some obvious mechanical defect, I'd leave it alone for a "driver". Might not be a bad idea to get a better stall convertor (suited to your needs and the cam you choose) just to get a little more performance out of whats there. With 80k on the engine (again assuming there are no obvious mechanical problems), I'd just put a new oil pump and timing chain kit on it, do whatever cam you wanted, and you'll need a new set of exhaust manifolds since the truck manifolds don't fit between the rails and motor mounts on these older trucks. That will be enough to get you on the road safely and pretty reliably. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

04-27-2013, 09:58 PM	#3
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,939	Re: performance suggestions These motors like a cam change. Get that and a good tune and you will be set. Posted via Mobile Device __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

04-27-2013, 10:07 PM	#4
davecarney2 Registered User Join Date: Jun 2012 Location: Catawba NC Posts: 230	Re: performance suggestions Any idea what they did different to get the 50 extra hp for the trailblazer SS v/s the Silverado SS??? Posted via Mobile Device

04-27-2013, 10:42 PM	#5
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: performance suggestions Yes, they use an LS2 block which has a bit more compression paired with LS6 heads and LS6 cam. Not to mention a better intake and throttle body. Posted via Mobile Device __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

04-28-2013, 09:59 AM	#6
1969x11 Registered User Join Date: Sep 2006 Location: cedar bluff,al Posts: 29	Re: performance suggestions Mid 220 to 230 duration cam, valve springs matched for cam lift , hardned pushrods. Circle-d budget 278mm 4l80e converter.Should get you around 375rwhp with a good tune.

04-28-2013, 11:03 AM	#7
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: performance suggestions MKe sure you have the torque management turned off in the computer Posted via Mobile Device __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

04-29-2013, 07:45 AM	#8
davecarney2 Registered User Join Date: Jun 2012 Location: Catawba NC Posts: 230	Re: performance suggestions thanks guys



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