DavidGXP

iTrader: (14)

https://ls1tech.com/forums/generatio...-revealed.html

I'm a research junkie... 515hp! 216/220 in a 5.7!
Ohh.. lets stick a TR224 in a 5.3..Yeah freaking right!

DavidGXP

iTrader: (14)

Somebody please... Bolt on the 5.3L TFS package with headers and a LS6 intake!
http://www.trickflow.com/egnsearch.a...2&autoview=sku About 3k from summit. Yes it will work!

NHRA T/A

In the name of science, I'll volunteer my car for this. All I need is someone to donate the parts and labor.

DavidGXP

iTrader: (14)

I've been wanting to do this for a long time now..
The heads would bump our compression up to 10.8:1

DavidGXP

iTrader: (14)

I'll do the labor man.. You provide the drink!

NHRA T/A

I'll definitely provide the drinks! Now I need someone to donate the parts. LOL.

LS4SPEED

iTrader: (3)

Contact Vendors, they can help if persueded properly.

Ill_Born_ss

Ahhh.. but our mouse won`t accept the 2.00" intake valves.

DavidGXP

iTrader: (14)

We have the big valves, I had my heads off and messured. Plus the tfs package is for a 5.3
Just get some lifters

Ill_Born_ss

Correct, it was too early and I was thinking 2.20"... somehow the large valve 2.20" was stuckin my thoughts, brain fart I guess!

nmp0098

They talk about their results a lot in that post, but they didn't show much data on the parts they tested and they didn't plot a lot of graphs. I would have liked a more thorough write up of the process and results instead of just the conclusions, but that's me.

They didn't really say anything earth shattering. Our stock heads flow great 0.5"-0.55" range, and porting doesn't buy that much more flow over stock in that range. Most aftermarket cams are in that lift range because that's about what the stock rockers and heads will take. Roller rockers buy some room, but eventually you need to do some modifications to support additional lift. So, for stock to lightly ported heads, of course compression would have a bigger influence (as long as you have enough knock resistance to run enough advance to make power).

I would be curious to see the intake centerline of the cams they are installing. Having the right size cam is better than have too big a cam and advancing it. I just made lemonade with my cam... ...if you know what I mean. All I'm saying is that if the bigger cam is making peak power at roughly the same RPM as the small cam, then it is probably advanced a bit and you would see bigger peak numbers if you installed it straight up and spun the engine more.

Now, a big lift cam with massively ported heads combined with a valvetrain and bottom end built to spin to 7000-8000 RPM is a different animal, and it would never make big power without the duration to support it no matter how much you retard the cam.

Since you are a small cam fan, take a look at what Mast Motorsports and others are doing with small cams and VVT. Pretty amazing stuff. I drool over the thought of getting VVT into my car, but even though it would work mechanically the mechanism won't clear our water pump manifold without extensive modification to said manifold. If I could have my old top end and low load mileage with my current mid range and torquey DOD (and the ability to blend in between), I would have a really badass motor.

My final thought is that I think street driven cars with four speed autos are better off with a fat torque curve than a peakier, higher power engine... and vice-versa with a 6 speed auto. Thus my decision to advance my cam. The new six speeds have steep first gears to get the car going and tight splits on all of the shifts, which is perfect for a high-rpm, built-for-power motor.

JDMC5

iTrader: (3)

Small cams aren't bad, they just have to be the right one to make the power you want. Not saying your the guy but there is a lot of bad information on this forum.

GXP25

iTrader: (3)

Wow, and here I thought I could add VVT thinking it was straight forward (reluctor change for me and VVT parts). But damn this *** backwards engine, lol.

I agree 100%.

DavidGXP

iTrader: (14)

Flat torque curves are where its at with autos. Espcially.. with long.... ***... gears. Our stock cam makes peak torque at 4400 so this is why I am cautious. I really wish I knew what the advertised duration figures are since it's not fair to judge a cam strictly on the .050" figure. (We obviously have a lot). The TFS kit listed above is a dyno matched package which helps to eliminate the guess work. We really don't need much more head, but I would go for the bump in compression.
I'm just impressed with the 515hp that 216/220 cam made. (The TFS 5.3 package cam specs the same, so this is why I brought the package up) I wish I could see some dyno charts too. I'd like to spec a cam, with my compression, using similiar intake valve closing points depending on where the TQ numbers where on the graph.

Speaking of custom cams.. I'd like to keep the factory peaks the same. 4400 tq/ 5600hp
No need to change to a loser converter or have to rev past 6200.
LS6 heads peak around .550" valve lift, so I'd be tempted to find the cam that has the most duration at .050" with .320"-.325" lobe lift for the intake lobe. With DT headers, I'm looking at cams that have a few extra degrees of duration on the exhaust lobe. (Not much though) With stock manifolds (which, aren't as restrictive as what we all thought they were) I'd look for a little more duration, with a less agressive lobe at .050. But with the same lift. This is all for .050" figures though. For the advertised intake duration, Id like to stay around 270-275* and for the exhaust I'd like something around 274-28 Lobe seperation of about 114 The Lobe centers will take some studying of course.
These are just ball park specs.. and honestly.. the stock cam is awesome with the LS1 intake and stock exhaust manifolds. My heads with 1.8 rockers make super tq. I just wish I could have all of this that the stock cam provides with .550-.575 lift in a non dod version.

DavidGXP

iTrader: (14)

LSX Shelf cam list. Good stuff!
http://www.paulster2.com/LSx_Cam_Profiles.html

nmp0098

The specs have been posted a couple times. The stock cam has huge advertised duration specs (0.002"); they are in the 340 degree range. The stock cam is also retarded a little bit.

Check out the comp cams lobe catalog. The XE, XE High-Lift and XE-R lobes (page 17 and 18) are used by most speed shops that use Comp as their grinder.

http://www.compcams.com/Technical/Ca...obeCatalog.pdf

DavidGXP

iTrader: (14)

Been checking out so much crap lately that I can't sleep at night lol..
In fact.. I just spent about 45 mins talking to Roger from VHP. (Great Guy!) I also talked a tech from TPiS.
Choices...choices...choices... ahh.....
Intresting thing though is that both guys told me that the LS6 intake is stronger above 3000 rpm (duh.. right?) They both agreed that the LS1 was a better street intake and that the LS6 isn't all that much stronger till about 5000 and up. (On a built engine) I'll probly slap one on though just for the sake of having one. So.. it looks like I'll be tearing her back apart again but I'm keeping my stock exhaust manifolds. Nitrious too!
Three different cam choices to choose from. ennie.. minne... minnie.. moe..

GXP25

iTrader: (3)

Go small or go home!

AlabamaGuy

iTrader: (5)

There's a lot more to look at in a cam than duration. Lift, opening/closing times, ramp speed, etc all play a major role.

DavidGXP

iTrader: (14)

Think I found my cam. Vincihi 112 "Butt kicker cam" 210/218 272/280 114 L/S .551"/.551" and can be used with 1.8 rockers.
48* OL should be fine for use with stock iron manifolds and the 70* IC point (if my calculations are correcet) should be perfect for my CR
The cam listed above 216/220 has 52* OL and a 74* IC point. Better suited for engines with 10.5:1 CR IMHO. Assuming that these cams are installed/ground stright up.
If the 216/220 cam can support the 515hp in a LS1 then it would be more then enough for a little 5.3.
TPiS recommended their ZL10 cam 202/216 112 L/S .525/.525. And VHP recommended the 056 "Boss cam" which Chance707 is using.
I need more info about the ZL10 cam. The tech guy kept the specs from me....