bigo181979

Ok so I have a free 5.3L engine, I put a 6.0 in my 02 silverado.

I will be puting the 5.3l into my 68 chevy truck after I am done with the resto and I am probably gonna back it with a 4l60e or 700r4.

I am trying to get the most bang for the buck on this build, the motor has about 125k miles on it so I will be taking it in to have it freshened up and I am trying to decide what to do...

I would like to be in the 450hp range without supercharger or anything like that. So I don't know if I need stroker kit, or forged internals, what cam, ect. I AM A NOOB on this one!!!!

HELP ME OUT PLEASE!!!!!

nastychevelle

iTrader: (7)

goodluck with 450rwhp. if your wanting that much your going to need it punched out to a 3.905 bore with a ls1 rotating assembly then i'd do a good set of heads, and a custom cam.

NemeSS

iTrader: (127)

what yr is the 5.3?
can rebuild it using 4.8 flat top pistons. for higher compression
bore up to .060 to displace 336ci ot 5.5L
re use crank, rods, new pistons pressed to stock rods,.
the pistons used are speed pro brand. they are around 400$ new with matching rings.
and find set of stock 243 or 799 heads with basic clean up, rebuild with stock valves and upgraded springs. use with any street type cam.
i like using the LPE GT11 for street type quick response engines.

NemeSS

iTrader: (127)

SPEED-PRO
4.8 VORTEC 99-02 (Pressed wrist pin)H855CP 230$
3.780-3.84 (+.060) bore (8)
flat top (no VR)
1.324 Compression height
1.5/1.5/3.0mm ring lands
Ring selection:
SEALED POWER E9371K 136$
HASTINGS ZM4987 100$

bigo181979

450 at the crank is what I ment. I sell accessories and collision parts for a living so I have accounts to purchase aftermarket stuff very resonably and I am just trying to figure out where best to spend that money... I have seen cams do some good things, and I have seen that p&ping the heads really dosen't net a whole lot of gain, but beyond that I am cluless with these motors.

Really anything over 400 crank hp will make me happy.. at least at first!

bigo181979

5.3 came out of my 2002 silverado.

NemeSS

iTrader: (127)

the above posted pistons work for your build.
the 5.3 you have now comes with dished stock pistons.
if do not plan on forced induction. then makes sense to use flat top pistons to significantly raise scr.

bigo181979

So what will that bump my compression to? 10.0:1? Also I assume that would at that level I will need 91 octane(not a big deal, just making sure)?

So with the piston swap and a cam I can get in the 400 range?

NemeSS

iTrader: (127)

final SCR depend on on what assembly parts used. piston, gasket,etc. but 10:1 or above is possible.
with some 243 heads it is possible to make 400bhp or more. just depends what supporting parts used.
if the engine is bore .060 over. it will displace 336ci. just short 10ci of a
5.7 ls1.
although an ls1 uses a 3.897 (3.9) bore.

bigo181979

As of right now I am looking at running this intake set up
http://www.jegs.com/i/Edelbrock/350/...oductId=755239

A holly 770 Street Avenger Carb (any thoughts about these)

MSD coil packs

cam, valves, springs, ect. Comp Cams stuff
Pistons I have Manley available to me
Speed Pro for Bearings
Total Seal for Rings
Felpro Gaskets
What else?

ANY SUGGESTIONS/RECOMENDATION ON SPECIFIC PARTS FROM THESE MANUFACTURERS?

ZONES89RS

iTrader: (25)

If it is not smoking, i say stuff a GM hot cam in there for cheap, or something like the 224, spin that bitch up, it will be about 450ish FWHP with a set of stock heads with some work, it will take a beating and if it is not smoking, i would not even have the engine gone thru.

ZONES89RS

iTrader: (25)

So, the 4.8 piston will have the same compression height as the stock 5.3 pieces with the 5.3 crank and rods? I was not aware of this, makes for a good reason to take apart a 4.8 that is not going ot be used so you can get some compression out of a stock 5.3 with the dish pistons.

Pop N Wood

iTrader: (1)

That intake would be fine but whatever you do don't buy the Edlebrock ignition box. It is made by MSD but you can't program it with a lap top, only the preset pills. That means you are stuck with a 5500 RPM redline. The edlebrock box will have no resale value for just that reason.

Also most people think the MSD coil packs are too flipping expensive. The truck coils that came with the 5.3 are the hottest coils anyway. Save some money and use those.

You would be the first person that I have read using a street avenger carb. Let us know how it works out.

Just source a used LS6 cam and springs and call it good. The carb intakes have a HP advantage over the FI intakes anyway. I would bet an LS6 cam and heads would put you around 400 crank.

hifi875

iTrader: (2)

i am running a 670 avenger on my 5.3 now. runs fine. i am running milled 243s and a pat g cam. w/3.42 gears and 2400 stall ive run 13.2 so far without having it fully dialed in.

NemeSS

iTrader: (127)

yes. same compression height range.

-4.8 293CI- PART NO. H855CP (8) 230$
3.78 BORE
1.324 CH
Flat top no VR
1.5/1.5/3.0mm ring lands

-5.3 325CI- PART NO. H856CP (8) 260$
3.78 BORE
1.325 CH
.068 SPHERICAL DISH (7CC+/-)
1.5/1.5/3.0mm ring lands

bigo181979

Good to know about the MSD box I will have to make sure I go with the MSD not the Edel unit!

NemeSS

iTrader: (127)

the edelbrock 6000 box is very simple and works very well. it is user friendly and gets the job done. thers nothing wrong with it for a basic swap or build.
if you plan on eventually running forced induction or spray. then it makes sense to use a 6010 from the beginning.

Pop N Wood

iTrader: (1)

Boy, I don't know. A 5500 RPM rev limiter seems rather restrictive to me.

ZONES89RS

iTrader: (25)

Yea, not to mention the lack of the 2 step rev limiter and timing retard for nitrous, the Edelbrock unit looks like junk in comparison.

Black&White

I have the Holley 770 Street Avenger waiting for when I get my swap going (hopefully soon). I got a good deal on it so I figured I'd give it a try. If I finish mine first I'll let you know how it does.