KyleODaniel Posted June 18, 2013 Report Share Posted June 18, 2013 I've been searching for a year or so now to find the perfect truck to hopefully one day start a rcsb, I was dead set on finding a 5.3Lengine in a single cab either black or white, with all the options possible, and let me tell you, they don't pop up often. Anyways the other day I was looking at a local dealer here in town and they had my truck, 05, black, almost every option I was looking for, but one issue, it was only a 4.8, so I got to looking up the specs on the motors, and I couldn't believe that its said the 5.3 was only making (give or take) 25 more hp than the 4.8, so my question here is, is there really that big of a gain with getting the 5.3, I've heard that the 4.8's hold up great to turbos and really show a huge gain, Im just looking for someone who has any info on either motor. Thanks- Kyle Quote Link to comment Share on other sites More sharing options...
Aldofashow Posted June 18, 2013 Report Share Posted June 18, 2013 5.3 has noticeably more power but if the truck is right just swap motors get a 2004 ls6 400 horse I've seen them for around 2000 as a salvage crate motor put a turbo to that and you'll be driving a monster Quote Link to comment Share on other sites More sharing options...
chawkins6789 Posted June 18, 2013 Report Share Posted June 18, 2013 I had a 4.8 and it was a great engine. I just wanted more power while staying CA legal Sent from my DROID RAZR MAXX using Xparent Red Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
1BAD2K Posted June 18, 2013 Report Share Posted June 18, 2013 4.8 would be nice if you were gonna boost it. I bought an 06 with a flexfuel 5.3 then yanked it for an LS6 like recommended earlier lol. Quote Link to comment Share on other sites More sharing options...
Aldofashow Posted June 18, 2013 Report Share Posted June 18, 2013 How much did you get the ls6 for was I close I seen one and haven't really looked in awhile Quote Link to comment Share on other sites More sharing options...
chawkins6789 Posted June 18, 2013 Report Share Posted June 18, 2013 How much did you get the ls6 for was I close I seen one and haven't really looked in awhile It came out of his totaled CTS-V Sent from my DROID RAZR MAXX using Xparent Red Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
silverado777 Posted June 18, 2013 Report Share Posted June 18, 2013 The main difference in the 4.8 vs the 5.3 is the torque. The 5.3 has quite a bit more torque than the 4.8 which is always good when moving these heavy trucks around. It depends on what your goals are. If you're going to stay NA I would wait out for a 5.3 or swap a 6.0 in it. If you're gonna go FI then I say the 4.8 would work pretty well. Quote Link to comment Share on other sites More sharing options...
Muggs Posted June 19, 2013 Report Share Posted June 19, 2013 Yeah the torque is noticeable between a 4.8 and 5.3 when stock Quote Link to comment Share on other sites More sharing options...
LSR Mike Posted June 20, 2013 Report Share Posted June 20, 2013 4.8 and a 5.3 are the same block, just a different crank, kinda like a 350 vs a 383 in the old days. Quote Link to comment Share on other sites More sharing options...
zachm89 Posted June 20, 2013 Report Share Posted June 20, 2013 4.8 and turbo it...you wont be disappointed Quote Link to comment Share on other sites More sharing options...
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