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5.3 with 4.8 pistons

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Old 02-03-2014 | 05:31 PM
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Default 5.3 with 4.8 pistons
hey guys and girls i was wondering what the best top end combination with a 04 lm7 with the flat top 4.8 pistons. im wondering what heads cam and injectors will get me the furthest in hp.
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Old 02-03-2014 | 06:49 PM
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What kind of rods did you put in your 3.622 stroke while using 4.8 pistons.
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Old 02-03-2014 | 07:12 PM
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i was just going to use the stock rods out of the 5.3 if that is possible
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Old 02-03-2014 | 07:37 PM
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Not sure, maybe someone else can chime in on this. But 4.8 pistons are designed for a (I believe) 6.3" rod and 3.2 stroke.
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Old 02-03-2014 | 07:47 PM
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4.8 rods are about .250 longer to make up for the shorter stoke of the crank. Last week I was sold "5.3" pistons and rods. But after installing one, and put the crank to TDC, this is what it looked like...
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Old 02-03-2014 | 07:49 PM
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This has been covered once before they will work. In the part catalog for GM. The 4.8L and the 5.3L H.O. L33 use the same pistons (same part number).
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Old 02-03-2014 | 07:53 PM
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Look like this, sorry.
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Old 02-03-2014 | 07:53 PM
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Back to your Question about Heads Cam Injectors? you trying to run a factory head or going aftermarket?
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Old 02-03-2014 | 07:55 PM
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Originally Posted by Busa_rob
Look like this, sorry.
is that a 5.3 rod or 4.8 rod?
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Old 02-03-2014 | 07:59 PM
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5.3 crank, 4.8 rods.

Dude sold it to me saying it was 5.3.
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Old 02-03-2014 | 08:06 PM
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You have to match rods and crank, cant interchange them from 4.8 to 5.3. but piston will change out
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Old 02-03-2014 | 08:08 PM
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Well yeah no ****, I know that. Guy that sold them to me didn't, or didn't care.
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Old 02-03-2014 | 08:23 PM
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Originally Posted by Busa_rob
Well yeah no ****, I know that. Guy that sold them to me didn't, or didn't care.
Gotcha thought you were saying that pistons wouldnt work. and i was mixed up on what you were saying about it. sorry
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Old 02-03-2014 | 11:33 PM
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Originally Posted by Busa_rob
Well yeah no ****, I know that. Guy that sold them to me didn't, or didn't care.
that is some cold blooded s***
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Old 02-04-2014 | 01:11 AM
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very simple, can use the 4.8 or 5.3 block. but have to use the 5.3 crank and rods, the 4.8 pistons. makes a higher compression 5.3.
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Old 02-04-2014 | 10:52 AM
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idk i can get a great deal out of anything from the gm catalog but was wondering if they had the right combination of parts to get me to the 500-600 rwhp range on my 03 1500
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Old 02-04-2014 | 01:00 PM
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boost
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