Does anyone know for sure what the stock cam specs are in the 04-05 V's?

I have found two specs. MY01 and MY02.

MY01
.525 .525 204/211 116
MY02
.551 .547 204/218 116

Two versions of LS6's... one with 400HP and one with 405HP. I am assuming it is the cam that is installed. Higher lift... longer exhaust duration gives the 5HP extra.

Does anyone have a stock one lying around after a cam swap?

And is there any difference in Valves, pushrods, rockers, springs for the two slightly different cams?

I have searched and searched and searched...

 

The MY01 is from the 01 Z06 with 385 hp, it's also the same cam used in LS2s.

But for a 02-05 LS6 the MY02 is the right one.

 

Awesome... thanks!

 

And how about Piston to Valve Clearance. That doesn't seem to be anywhere i look. Maybe i just don't know how to do the math.

I know the stock springs are rated at .650" Correct me if im wrong.

How much more lift do i have available without changing springs/rockers?

Would like to get a smaller LSA longer duration slighting higher lift cam. Just can't find my limitations.

 

.550 is the what the stock springs are rated for.

There are plenty of good small cams out there with ~.550 lift. Or you can have one custom ground. Probably your best bet. PM Patrick G about which cam and why.

 

FWIW I ran a cam with .649 lift. Of course I had the springs to support that but you can go pretty big without having to worry about PTV clearance.

 

I could have sworn the LSA is 117.

 

PTV is more dependent on valve timing than max lift. It's always best to measure if you're not sure.

Yeah, most places list it at 117. If it's anything like buying an aftermarket cam it could be anywhere from 116-118.

 

239/242 .649"/.609" 111 LSA

Valve timing does play a large roll PTV clearance. This is the cam I had before my maggie and had no problems.

 

What kind of numbers did you have before the maggie? Any idea? Im looking to get 450 to the wheels.

-Fast 90/90 or equivalent
-Cam w/hardened pushrods
--trying to keep the rest of the head stock. looking for flow numbers for the stock heads.
-Tune

 

T i think it can be done with every bolt on and free mod, and a big cam.....but I bet youd be faster On the street with a smaller cam...peaking at 435rwhp but with much more useable power under the curve

 

I'm not necessarily looking for a big cam. I'm in the market for a mild cam. It is my daily driver. I just want the power there when i request it. ya know?

I want a NA motor for right now. I plan on going FI here in the two or three years. Depends how soon my wife wants a bigger house. Before the FI, need to upgrade the rear. Just waiting for the "perfect" solution.

My ambitions for 450 rwhp obviously involve usable power. The LSA on our stock cams is one of the inhibitors. Because of emissions and government regulations. Like Jon had stated.. there are plent of cams around the same lift that will give me more usable power. I found flow data... now i just need to match up some numbers to see if i need to get minor head work done. It doesnt look like i will...

Stock LS6
.200" .300" .350" .400" .450" .500" .550" .600"
156 204 225 243 257 268 275 278

Head with Stock intake
.200" .300" .350" .400" .450" .500" .550" .600"
154 204 220 235 247 257 263 265

As you can see... the stock intake has some restriction up towards my max lift. The Fast 90/90 combo should limit most of that allowing better flow. I have to do the math... but even 263cfm should be sufficient with a mild cam upgrade.(?)

I'm still researching. Anyone should feel free to add additional input. As i'm no expert and do not claim to know more than anyone else on here. This is just what i have researched.

 

UPDATE*

I'm probably going to keep my Stock intake... the fast 78mm is only good for 10HP more.. and at $800+. I can deal with 10HP less.

throttle body - fast 78mm
Comp Cams XR275HR
222/224 .566/.568 LSA 112

This comb. had a dyno sheet and write up i found researching is good for:
*470HP @ 6500
450TQ @ 4900

*done on a new crate motor.

Only mods were Cam, TB...

w/ FAST 78mm intake...
480HP @ 6500
455TQ @ 4900

 

You realize that is like 390rwhp/378rwtq in a V, right?

You are looking for 450 rwhp?

 

Yes. my comparison is for the intake. Between the LS6 stock and the Fast LSX 78mm a 10HP difference with that cam. May be different with a little more aggressive cam... but haven't come across anything yet.

I am looking to keep my heads stock except for pushrods if i can. I haven't found any data on FAST intakes with ported heads yet. I am assuming that they will not differ too much. We will see.

 

From what I have learned you will need head, cam and headers to make 450 rwhp. You can easily make it at the crank with just a cam.

 

I'm not looking to do a nitrous application. One reason is long term effects on the motor... and price of constantly filling a bottle. You figure about a 1200-1500 cost for a nitrous application to include intake. Tune... and fill the bottle constantly. What the average charge per lb.

 

04CTSVFL has.....

Kooks 1 3/4, !Cats, Magnaflow Exhaust, Eibachs, K&N Intake, Extreme Composites Cowl Hood, B&M SS, Dyno Tuned by Johan Mangs - 386rwhp/365rwtq

Add a cam, and tb....should get me close to 450.

64HP gain from cam and tb isn't unheard of.

 

Part # 12565308 2002-2004 LS6 Cam

duration @ .050 lift (deg) I:204 E:218

max lift w 1.7 rocker I:550 E:550

Lobe Seperation (deg) 117.5

right out of the GMPP catalog.

 

386 on a dyno is 386 on a dyno. Would you be happier with me saying...

Im looking for 500-550HP at the crank with cam, throttle body, intake and minor head work?