Forged 5.3 Pistons?

I got some custom pistons made from Diamond last month, can't remember how much, but they can do a few custom things for you when you order them.
I bet a light hone, new rings and pistons, good to go.

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Originally Posted by 03chevytruck

So if i upgrade rails i will not have that problem? If so what rails do i need to get?

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I didn't say A/M rails don't have that problem just that stock ones can.

Ha--Jay, it is funny how I talked to you about all of this stuff without reading this... :lol:

Yup, do the Wiseco 3.78 pistons (K474XS) and ring set...

+

ARP head bolts

+

ARP rod bolts

+

head gaskets...and you are good. You are prolly looking at dropping a little over $1k in parts. Have fun!

Oh, and some new fuel rails!

Well, found out today that the Wiseco pistons for the 5.3 won't be available for another 2 months!! I looks like I'm going to have to bore it out to a 5.7.

For having to pull the motor completely apart and hone the cylinder
walls, you might as well just go ahead and bore it out for 5.7 pistons.

You gain some cubes, wont cost much more, you know you have good
fresh cylinder walls and parts are readily available.

If you have the money I'd seriously consider upgrading the rods too.
Will make the engine bullet proof.

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Originally Posted by r.barn

For having to pull the motor completely apart and hone the cylinder
walls, you might as well just go ahead and bore it out for 5.7 pistons.

You gain some cubes, wont cost much more, you know you have good
fresh cylinder walls and parts are readily available.

If you have the money I'd seriously consider upgrading the rods too.
Will make the engine bullet proof.

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Yep, that's what's going to happen. I will be getting forged pistons/rods, rings, ARP bolts all the way (heads, rods...), worked 317 heads all balanced. Should be a pretty stout combo when finished. I'm looking to make a little over 300 rwhp, think I'll make it??:spit:

so will those pistons work with a 4.8 as well?

Nope. That would be like putting 327 pistons in a 350 without changing other stuff...I think.

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Originally Posted by whitesilvy04

so will those pistons work with a 4.8 as well?

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The pistons that Wiseco has coming out in a couple of months will work on your 4.8. The ones I will be going with are for a 5.7 with a 3.905 bore and will not work with the 4.8. The 4.8 has a 3.779 bore I believe.

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Originally Posted by GasGuzzler

Nope. That would be like putting 327 pistons in a 350 without changing other stuff...I think.

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the difference between the 4.8 and 5.3 is in the stoke. the bore is the same. to compression will be differenent with the same pistons, but they should work.