Just Samples

Hey guys, first time on the forum and very new to the LS world. Just picked up my engine for my 79 Z28 swap. Engine come out of a 2004 GMC Denali Yukon, 73,000 miles. Think i got a good deal at 1,200$. Intake, accessories and all. Anyway onto the meat of this conversation. Main goal is 500 rwhp, not really on a super tight budget but i would like to see what i can get out of it without disassembling it completely. Engine has the stock 317 heads.

Plans:
-Aeromotive stealth pump/fuel setup
-Holley EFI
-Holley high ram intake? (not sure, heard good things on it)
-Natural aspiration, nothing forced right now.
**dependable**

-No emissions
-No major racing

Main question is, what do you guys think i can get out of this engine with a intake, cam, tune, headers, and maybe a head swap. And will the stock interals be alright? From what i read they would be perfectly fine. This isn't going to be a drag machine, just a toy to drive to to shows, town, and beat on every now and again.

<a href="http://s1078.photobucket.com/user/Just_Samples/media/DSC_0020_zps86x2ueuu.jpg.html" target="_blank"><img src="http://i1078.photobucket.com/albums/w494/Just_Samples/DSC_0020_zps86x2ueuu.jpg" border="0" alt=" photo DSC_0020_zps86x2ueuu.jpg"/></a>

k_garretson23

iTrader: (8)

youre going to need a very health h/c/i set up to get that kind of power out of a stock bottom end 6.0

Just Samples

I understand. What exactly do you mean by healthy? I was thinking Holley high ram, l92 heads, and a cam maybe from lethal racing, really enjoy their night fury cam. Like i said, i'm brand new to this, please advise away. I just see people like Sloppy Mechanics on youtube turbo a stock bottom 5.3 and get away with it making like 500-600 for a while.

96capricemgr

iTrader: (1)

I own an LS3 and would NOT go L92 on a 6.0.
Far as hp turbo makes a number with low rpm. NA needs rpm which can be hard on rod bolts and bearings.

k_garretson23

iTrader: (8)

if you want to make that n/a your going to need nice aftermarket heads such as and bump the compression, or very nicely done factory heads. As for a cam that varies Id contact tick for a cam.

I have a built 370 im hoping to make around the 500 mark on motor without spray and I have mamo motorsports 235s and a custom grind nitrous cam, edlebrock vic jr and 4150 tb

Darth_V8r

iTrader: (4)

500 NA on a 6.0 takes a lot of attention to detail, and every little bit counts. You're going to want to work very closely with someone like Tony Mamo or Brian Tooley. And you'll want to follow their advice to the letter. If they tell you to check wipe patterns 17 different times with different shims, you do it.

You'll want aftermarket heads, a well chosen cam, short travel lifters, lightened valves, very well designed valve train to support 7K rpm, 11/32 pushrods, fast 102 intake and 102mm throttle, 1-7/8 or 2" long tube headers, X-pipe exhaust.

And if you just haphazardly grab parts, you're not guaranteed the number you're chasing.

If you're willing to spend the money it is well worth it. I love driving a powerful HCI motor. Best advice I can give is to decide who you're going to work with and work closely with them. I highly recommend Tony Mamo

Just Samples

Whats a realistic number for a HCI 6.0?

HCI2000SS

iTrader: (2)

My LQ9 has a very average a HCI setup and it's around 450 rwhp

Just Samples

How much will a good set of headers help? I know that an engine is a big air pump, the more in and the more out, the better off you are.

HCI2000SS

iTrader: (2)

Good set of headers might be worth 5 to 10 hp over some average ones

KCS

iTrader: (20)

PatG spec'd a cam for an LS2 Corvette that made 500whp with the stock heads. I'd say with that Hi-Ram, you shouldn't have any problem, but I would look at trading the 317 heads for the 243/799 heads with the smaller chambers to bump the compression up.

Just Samples

What's your recommendation for what i'm doing?

KCS

iTrader: (20)

I think you're on the right track. The bottom end should be fine since it's an 04. The rod bolts are better as are the rods themselves. Even though the 317's have plenty of potential, I would rather have the 243/799 heads for the smaller combustion chambers.

I think you'll like the Hi-Ram too. It'll help make more higher RPM power and it's definitely a head turner at a car show. I just got mine in today but I'm using two 4150 EFI throttle bodies instead of a single 90/102mm.

Just Samples

Ok, much appreciated on the input, will be ordering some stuff soon.

Does this model motor have anything i need to get rid of? like egr or something? The newer ones had the displacement on demand (DOD) right?

KCS

iTrader: (20)

I don't think so, I'm not familiar enough with all the different models, but looking at the picture it doesn't look like it has VVT. Once you get the intake off, the valley cover will tell you if it has DOD/AFM because it will look like a graph rather than a smooth plate.

Just Samples

If i do heads and a cam, is there any benefit to using better things like roller rockers and hydraulic lifters? Is it good practice or just plain overkill? I want to do things right the first time.

96capricemgr

iTrader: (1)

Stock rockers are roller fulcrum and with a trunnion bearing upgrade people are beginning to dabble in even using them with solid lifter cams so with the $100 bearing upgrade to them they are great.
Lifters are up for debate, most people just replace them with GM standard replacements and those can handle a lot.

Just Samples

Just found out and updated the title, but will this thing being a LQ4 really change anything? And just to make sure, anything else to change or delete, egr, pcv?

KCS

iTrader: (20)

Being an LQ4, your compression ratio is a lot lower. IIRC, the LQ4 has a 6.7cc dished piston.

Just Samples

But would it really affect much build wise? how do i have to go about it differently?