ancel.abadie

Just got a 5.3 ls that i am in the process of building.i have 799cc heads with 660 valve springs and a 5 angle valve job done. My gaol is to get it around 600 hp n/a and was wondering what eles id have to do to achieve my gaol
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thunderstruck507

iTrader: (18)

I'm assuming you don't expect it to be streetable.

You're going to need to bore/stroke it to the max, buy the best aftermarket heads available, large cam, and still probably need to run enough compression race gas will be your only option.

This is in addition to a badass intake manifold and all other bolt ons.

There is no way in hell you will get a stock bore/stroke 5.3 with CNC ported 799s to make that kind of power on pump gas IMO.

ancel.abadie

Well what would be the best rout to go to get it to 5-600 hp i can always go turbo???
but what about cam,bore, etc
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JoeNova

600 HP N/A 5.3?

You'll be replacing everything except for the block and crank.

ancel.abadie

well i dont have to go n/a i can always go turbo im just trying to figure out what the best setup whould be to get 5-600 hp
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Tuskyz28

http://www.trucktrend.com/how-to/engine/1208tr-5-3l-bow-tie-builds-mild-to-wild/

big hammer

600 hp NA 5.3 would be one high strung beotch

uraloser2me2

The problem with building a 500 to 600 hp 5.3 is 1 it won't be street able it would be solid roller and really high compression on race gas. 2 you would be cost you will need aftermarket pistons to clear the valves with your monster cam, shaft mount rockers and a bad *** set of heads. After spending all that money you might as well have bought an ls3 that would make the same power and run on pump gas.

99 Black Bird T/A

iTrader: (4)

As mentioned many less expensive paths.

EZ way build for 400+ wrhp NA and spray for 200-300 hp more.

This article is a great starting point LS3 block + 4.8 crank 607 hp from a 339 or 5.5
Cut 14 CID and you have a 5.3, may be LS2 block + 4.8 crank and the best trick flow heads.

http://www.hotrod.com/articles/4-8l-...pm-ls-stroker/

A harrop intake and a few other tricks should do the job.

5FOX3

What about a rod/piston 5.3, 13.5:1 cr, gnarly cnc ported 799's, big intake, cam motion llsr, and a lightweight valve train on e85....?

I mean a single turbo with gen4 guts in the 5.3 and turbo cam would make 600hp all day happily

Tuskyz28

No need for a turbo. Hell it can be did on motor. It can be done with a turbo setup cheaper tho. I just hate having to worry about boost issues so I'm a all motor guy.

Look at the link I posted above. 5.3 mild to wild and you'll see where a stroker 383ci made 603 horses with total engine airflow cnc ported heads with 11.0.1 compression. Bump the compression up to 11.5 and replace those heads with a TFS 220 or so head and I see 620 at the crank threw Tusky's telescope.....

5FOX3

But if its bored/stroked its no longer a 5.3

64post

iTrader: (5)

Build a nice reliable forged piston, good heads and cam 5.3 them add a 250+ shot, that might be the easiest way to get there. Forget N/A.

uraloser2me2

You could do it with a 150 shot, 243's and a cam.