4.8 to 5.3, requirements?
08-23-2005, 03:46 PM
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Originally Posted by 4.8shorty
Ok, according to the link mjhoward put up, the 4.8 and 5.3 share the same bore, and the 5.3 and 6.0 share the same stroke. Sorry to state the obvious, just trying to sort this out in my head. Well, I guess that says to me that the 4.8 and 5.3 could possibly share the same pistons, but either the crank, and/or the connecting rods are different. Probably the only way to know for sure would be to get part #s for the pistons, rods, and crank from the dealership, and see which ones are different. Keep the opinions comming though!
08-23-2005, 03:55 PM
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Originally Posted by fogle04
they would have different part numbers more than likely. i knew i was saying a part wrong. the stroke is different on them right?
08-23-2005, 04:01 PM
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it wouldnt suprise me since it is 2 different engines. thats just how they do it sometimes. also the year model can change the part number also. ive worked at a ford dealer and now i work at a dodge dealer in parts and they do some dumb things with part numbers
08-23-2005, 05:32 PM
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i think all you have to change is the crank. the difference in the pistons are a 4.8 is flat top and the 5.3 has a slight dome therefore, giving the the same comp. i was thinking of putting a 5.3 crank in my truck also, the comp will be higher though. i work at the local chevy dealership and i will check this out and let yall know for sure
08-23-2005, 06:50 PM
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"i work at the local chevy dealership and i will check this out and let yall know for sure"
That would be great. I'll look forward to hearing what you have to say.
That would be great. I'll look forward to hearing what you have to say.
08-23-2005, 06:52 PM
#18
ok the 4.8 has a shorter stroke and longer rod than the 5.3 which has a longer stroke shorter rod but the 4.8 pistons are flat top and the 5.3 pistons are dished not domed. if you want you can put in a 5.3 crank with the 5.3 rods and stock 4.8 pistons but it is going to raise the compression up how much dunno. but if you do so i would check the clearances between the heads and the pistons just to be safe. and do a good tune and 93 octane fuel. heads are same all manifolds are the same hell even the block is the same just diff rorating assembaly.
THIS agrees with everything i said except the fact of the rods it says on the chart the 4.8 rods are the same as the 5.3 rods but that makes no sence unless the 5.3 piston it REALLY short
THIS agrees with everything i said except the fact of the rods it says on the chart the 4.8 rods are the same as the 5.3 rods but that makes no sence unless the 5.3 piston it REALLY short
08-23-2005, 09:11 PM
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Originally Posted by 4.8T
ok the 4.8 has a shorter stroke and longer rod than the 5.3 which has a longer stroke shorter rod but the 4.8 pistons are flat top and the 5.3 pistons are dished not domed. if you want you can put in a 5.3 crank with the 5.3 rods and stock 4.8 pistons but it is going to raise the compression up how much dunno. but if you do so i would check the clearances between the heads and the pistons just to be safe. and do a good tune and 93 octane fuel. heads are same all manifolds are the same hell even the block is the same just diff rorating assembaly.
THIS agrees with everything i said except the fact of the rods it says on the chart the 4.8 rods are the same as the 5.3 rods but that makes no sence unless the 5.3 piston it REALLY short
THIS agrees with everything i said except the fact of the rods it says on the chart the 4.8 rods are the same as the 5.3 rods but that makes no sence unless the 5.3 piston it REALLY short
08-23-2005, 09:19 PM
#20
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Originally Posted by 4.8shorty
"i work at the local chevy dealership and i will check this out and let yall know for sure"
That would be great. I'll look forward to hearing what you have to say.
That would be great. I'll look forward to hearing what you have to say.
i also work for a chevy dealer.