Black Sunshine/ 00SS

iTrader: (1)

What are they comparable to? Are they the same as an LS1, LS6? I'm thinking about the "budget" buildup of of the 6.0, and wondering if I found a complete block, if that would suit my purposes. I'm having a hard time justifying the cost for a stage 2 set up from the big 2. Seems like 25 hp for $1600-1800.. I could get them ported local & valves changed if need be, for a hell of a lot less. Granted, I would not pick up as much power, like maybe 5-8 less, but pondering the idea if it would be worth it. I'm sure I could sell them on down the rd, for what I had into them, should I change my mind. <img src="images/icons/confused.gif" border="0">

Patrick G

iTrader: (14)

If you get the '01 or '02 aluminum 6.0L heads, they're unmatched at low and mid lifts (flow-wise). They're even better than LS6 heads. With stock valves, you should be able to get some killer numbers (on a very low budget). Unless you plan on running a .550+ lift cam, you'll go just as fast as LS6 heads with the aluminum 6.0L heads.

FYI, SAM in Houston has a pair that flows 275 cfm at only .400 lift. <img src="gr_eek2.gif" border="0"> That's huge mid lift numbers. Keep in mind, they've been massaged quite a bit and have larger than stock valves, but the fact of the matter is, the aluminum 6.0L heads make for a killer budget buildup.

CHRISPY

Patrick
What valves did they have in them?
Cheers,
Chris

Z00

I'm getting a set ported and when I get them done I'll post the info on hp I get. I'm using stock valves and the guy does good work for cheap.

Patrick G

iTrader: (14)

Chris,

I believe the SAM heads have 2.055 intake and 1.600 exhaust valves...Ferrea...really good stuff.

RyanJ

see....budget building works.

complete 6.0's from 01+ will run like $1000+. Valvegod sells 01 heads for about 450 and bare blocks (any year) for 385 i think. a well built nitrous motor would be a .030-.040-over iron block with stock crank, Eagle 6.125" forged rods (SBC), ARP bolts, and JE pistons. with the block, heads, and that bottom thats like $2000 for a long block minus intake and machine work. Stock valves would work ok for a nitrous motor. save some cash at least.


Ryan

kewlbrz

GM's chief powertrain engineer states specifically that the LQ9 and LS6 are cast identical, the only difference in the castings is the LQ9 head has slightly larger combustion chambers to accomodate the 6.0 liter bore.

Now if you really want a badazz head. Try to get your hands on a C5-R head casting. Different valve angles, and the ultimate flow. Of course those are not available to the public yet. And you have to use a special intake manifold to match up to that heads ports.

Quote from John Juriga - GM Powertrain Chief:

"The LS1 already was the best overhead valve engine and the LS6 brings it up another level. This is a very high-performance engine perfectly suited for everyday driving. It's safe to say it is a benchmark for the world. That the same exact heads are going to go on the 6.0-liter LQ9 used in light trucks for 2001 says much about the LS6’s durability, as well."

[ December 14, 2001: Message edited by: kewlbrz ]</p>

Pro Stock John

iTrader: (34)

6.0 heads are 70cc chambers so you would have to mill them to bring that down.

Other cost will be getting new valve seats put in, that's a few hundred bux.

I am by no means an expert, but I was talking to Pete Incaudo from CNC Cylinder Heads at PRI and he said that the LS6 heads are still better. I don't recall what he exactly said but I can ask him to come visit this thread. But I am thinking the 6.0 01 heads are better than the 01 car heads????

99 Black Bird T/A

iTrader: (4)

BLK SunShine, might waht to talk with Total Engine Airflow. They did a 6.0 heads and B1 cam for a LS1. With longtubes it dyno'd 420 rwhp with the stock LS1 intake!

If you talk with TEA talk to Brian the owner.

Crazyquik

If they start out with 70 cc chambers, and you milled em enough to get to 11:1 compression with a stock short block, wouldn't you need some pretty custom pushrods?

Could have the chambers welded and keep the stock pushrod length, but it would need to be done properly.

J.

99 WS6

I was wondering, would the 6.0 heads be a good choice for a lower compression build up for a blower? It seems like they would be a cheaper alternative to the LS6 heads.

Crazyquik

They're a very good choice for a blown motor, due to combustion chamber size with the added benefit of the superior swirl characteristics the LS6 style heads have over the LS1 style.

BYBYC5

just to chime in........
what would be the benifits of the 6.0 or the 5.3 heads....on stock motor with nice size cam <img src="gr_grin.gif" border="0">

-Joseph-

iTrader: (12)

Does anyone have the actual flow specs of the '01+ heads in stock form? If not, I can try to get some help to flowbench one local. I think it would actually be helpful to have all the LA1/LS6/Truck head flow numbers documented in stock form.

kewlbrz

This chart doesnt have the Truck heads, but should help get us started for the comparisons.

[code]Without Manifolds - Headflow Only:

Cylinder Head Intake Manifold .200" .300" .350" .400" .450" .500" .550" .600"

Stock LS1 N/A 137 187 207 223 228 237 242 243
Stock LS6 N/A 156 204 225 243 257 268 275 278


With Manifolds:

Cylinder Head Intake Manifold .200" .300" .350" .400" .450" .500" .550" .600"
Stock LS1 LS1 136 184 200 214 222 227 229 235
Stock LS1 LS6 136 186 206 223 227 236 241 242
Stock LS6 LS1 156 199 212 224 232 238 243 247
Stock LS6 LS6 154 204 220 235 247 257 263 265</pre><hr></blockquote>

[ December 15, 2001: Message edited by: kewlbrz ]</p>

TA2SLOW

I would like to know what the 6.0 liter head flows stock on the intake and exhuast.

Some has to have some numbers laying around.