So the only difference I've found between the 4.8 and 5.3 is 9mm of stroke. What all separates the 4.8 and 5.3?????
So the only difference I've found between the 4.8 and 5.3 is 9mm of stroke. What all separates the 4.8 and 5.3?????
~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~
rod length also, im sure cam is diff. thats about it. other than crank rods and pistons think the same. maybe heads too... not sure about heads.
single digit street truck
for build info
http://www.ls1truck.com/forums/my-ga...cs-garage.html
The best advice I have ever heard:... Only take B( . Y . )ST advice from someone that is CURRENTLY running a turbo setup close to, or bigger than what you want......
cam is same.
stroke is shorter, so of course crank and rods are different.
I think the 4.8's run a flat top piston too, to keep compression ratio
the same as 5.3's.
2002 Tahoe 4.8 - soon to be turbo'd - SOLD
1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
2012 Raptor - 497rwhp at 10psi
If you aint breaking - you aint going fast enough
4.8= short stroke long rod [great for high rpms use]
5.3= long stroke short rod
4.8= flat tops
5.3= dish
besides that the motors are identical, cam, heads, intake, exhaust manifolds and etc
the 4.8 is sorta like the modern day DZ302
2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
2002 Silverado - 427Lsx w/ Twin gt4202s
2010 Silverado crewcab Z71 - 5.3litre w/ procharger
2000 Wrangler - 5.3litre with some stance
2014 Xsport- 3.5 Eco boost
412 Motorsports
it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference
Wasn't the 4.8 built to replace the 305?
Step 1. crus at it.
Step 2. get a hammer.
Step 3. torch it.
So basically the pistons, rods, and crank are the only differences??? By the way this is just a big curiosity thing
~ Forged engine of some type ~ Ball bearing turbo of an unconfirmed size ~ 4L8000 trans ~ Beefy fuel system ~
Correct.Originally Posted by jetmech
The whole Gen-III series of engines was designed to replace the 1950's designed 305/350-SBC
Good little engine, buts its day had come and gone back in the 70's, Chevy kept jacking with it
well into the 90's for some dumb reason.
Last edited by r.barn; 04-27-2009 at 04:55 PM.
2002 Tahoe 4.8 - soon to be turbo'd - SOLD
1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
2012 Raptor - 497rwhp at 10psi
If you aint breaking - you aint going fast enough
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