P.O.R.N.

iTrader: (1)

Whant to find out who is a good company to look at turning my 5.3 in to a stroker. I am almost sure that the 408 will work out with my block but need to know where to find the kit to do it my self. For my old truck that had a 350 you could buy a 383 kit out of almost any magazine but im unsure about this one. suggestions would be great thanks

XFACTOR

Any sponsers to the right------------->should be able to hook you up.

Hawk179

iTrader: (1)

The problem with the 5.3 block is the wall thickness to punch it out. It is not set up as big as the 6.0 block. Now you could always throw a bigger arm crank in there and go for more cubes, but then you realy need to think about what you are trying to do with this motor and where and how you want to make power. That will determine what bore and stroke you go with.

Rick

P.O.R.N.

iTrader: (1)

Ya I really need to find out what it is I am going to do in the long run (most likly a turbo system), but for now i am trying to make as much power on motor as posible. I remember seeing 383 kits for about $700 but I dont think that will be the case with this one. I have E/I/ECM/4.10's and in the spring will be installing a cam, trailblazer 2500 stall, long tube headers and ported and polished heads. I just thought while I had it all torn down why not a stroker too?

natesiy

I'm doing a 5.3L stoker now. No kit for it, but Eagle's got a crank and rod set that'll work for the app. 4.000" stroke. Bore out the 5.3 to an oversized LS1 size. U'll be sitting with a 383 at the end of it.

I'm going with some mega dished pistons to lower my CR to 8:1 for my STS turbo. Hope there are no snags with the build up.

Mr. Sandog

If you're going to have to go different pistons anyway, why not a few hundred more for a 6.0 block?

tdrumm

iTrader: (18)

To get a 383 with 4.000" stroke, you'll have to overbore the cylinders 0.120, how are you doing this safely? Are you sleeveing the block? To just throw the 4.000" stroke crank in a 5.3 you'll get 359 in^3. At that point you might as well just throw a 6.0 there and enjoy the bigger bore. Plus does anyone even sell 3.78 bore stroker pistons?

I'm not against the idea of stroking a 5.3, just curious as to your setup and how you're going to get there.

Scream

iTrader: (6)

I've heard of several people going 0.120 over on a 4.8/5.3 block. I think that is the MAX that you could possibly do in a best-case scenario though, and would leave no room at all for a rebuild.

If you're getting new pistons and a stroker crank, there's really no reason to stay w/ the 5.3 block, especially with the SLP and HPE 402/408 kits.

natesiy

Going over 126 on my 5.3 block. I'll end up with an oversized LS1 bore @ 3.905". No sleeves. Enough people have done it and sonic checked it and the iron block holds up just fine. It's the exact same casting as the LS1 except cast iron. So if the aluminum sleeved version can go to a 3.905", why couldn't a denser metal, cast iron, do the same if it's the exact same part?

tdrumm

iTrader: (18)

Never would I think that I could bore my engine out an 1/8 of an inch trouble free. But I also agree that with the cheapness of the SLP kit which comes with a new 6.0 block, that when you factor in the machining cost for the 5.3 overbore and pieceing together the rotating assembly, you could get 20 more cubes for basically the same amount or slightly more, and have room for rebuilds.