turn 4.8 into 5.3
#1
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Hey Guys,
I bought a motor a few months back for a project off craigslist, was told it was a 5.3....ended up after swapping a new cam, springs, oil pan, and intake manifold that i have a 4.8.
From what I have read so far, the only difference in the two is the stroke...Rather than undo all the work I have put into this motor so far, is it possible to put in a 5.3 crank and connecting rods and leave everything else?
Thanks for any advice, this is in an attempt NOT to have to buy another motor and put all my parts and stuff on that one. Dont have the space for it and I found rods and a crank relatively cheap locally.
Thank you
I bought a motor a few months back for a project off craigslist, was told it was a 5.3....ended up after swapping a new cam, springs, oil pan, and intake manifold that i have a 4.8.
From what I have read so far, the only difference in the two is the stroke...Rather than undo all the work I have put into this motor so far, is it possible to put in a 5.3 crank and connecting rods and leave everything else?
Thanks for any advice, this is in an attempt NOT to have to buy another motor and put all my parts and stuff on that one. Dont have the space for it and I found rods and a crank relatively cheap locally.
Thank you
#4
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I was under the same impression, that the bore is the same just the 4.8 pistons are flat and 5.3 are dished previous to 2004. so the pistons should be the same, only crank and connecting rods would be different...Would the crank position Sensor still work?
#6
TECH Senior Member
iTrader: (25)
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crank, rods and piston dishes differ, blocks are the same bore wise
pin height is the nearly identical between the 4.8/5.3
post #7
http://www.performancetrucks.net/for...-5-3-a-431486/
pin height is the nearly identical between the 4.8/5.3
post #7
http://www.performancetrucks.net/for...-5-3-a-431486/
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#8
TECH Senior Member
iTrader: (25)
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or put the boost to it until it pops like the HRM 4.8...
http://www.hotrod.com/techarticles/h...g_bang_theory/
but yeah lilaaron233333 is right. easier to find a fivethree than swap all the stuff around.
http://www.hotrod.com/techarticles/h...g_bang_theory/
but yeah lilaaron233333 is right. easier to find a fivethree than swap all the stuff around.
#9
TECH Enthusiast
iTrader: (2)
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Flat top 4.8 pistons are an upgrade in a iron 5.3 as it would raise the compression a bit. The 4.8 has longer rods because of the shorter stroke. You would need to change the crank and the rods.
4.8 = 3.27 stroke, 6.278 rod length, and 3.779 flat top piston
5.3 = 3.622 stroke, 6.098 rod length, and 3.779 dished piston
4.8 = 3.27 stroke, 6.278 rod length, and 3.779 flat top piston
5.3 = 3.622 stroke, 6.098 rod length, and 3.779 dished piston