pwrshhftd

2002 Z06.
GONA DO A CAM SWAP.

what is the largest camshaft, I can install without, changing out the valve springs?

pwrshhftd

I have kind of narrowed it down to these.. look like they recomend springs with any cam swap.


is a 112 too much?
whats the power difference.. between these two?
Im thinking i want a 112 L.c.a.

G2-112 G2 224/224 Duration & 580/580 Lift at 112 Lobe Seperation.

G2-114 G2 224/224 Duration & 580/580 Lift at 114 Lobe Seperation

opinions?

97 SC Cobra

I heard that 224 performs very well. I would try to get it on a 112 as long as PV clearance isn't an issue. Ask whomever you purchase the cam from if there will be any issues. From what I understand going with the lower LSA will provide better response down low. Search LS1Tech, there's much info. on the 224. BTW you could probably run the Comp 918's with that cam for about $160. If you want to be safe throw on some PRC or Patriot duals. These two seem to be the most cost effective (about $275) and I haven't read of any failures. Good Luck with your choice.

2Fast4Radar

Both those cams would require you to swap your springs and retainers, you will pay much more down the line getting your heads refreshened when you break a spring.

2Fast4Radar

The lower the LSA the more aggressive the lobe seperation is I believe. I ran a 224/228 cam with my stock heads and dynoed @ 403rwhp @ 391 rwtq /w a good tune and a M6. (that is a power adder cam, on a 150 shot I did 527rwhp and 510rwtq )

Nick 02 Z06

I used to have that same cam on a car I used to own. It was a 581 lift though. I'm pretty sure that LG uses comp for that grind. Not only does that cam have way to much lift for stock springs but it is ground on an XE or XER Lobe which are fast ramp and will reak havock and break stock springs.

I'm not completely sure but I think that the stock springs will handle up to 550 lift.

pwrshhftd

That is what I was thinking.

I was goign to do the cam swap myself...

and just hated to get into the springs, but, it can be done..
Thx for the info.

403 rwhp, would be awesome!

rb185afm

On stock spring you dont want to go over a .550 lift. You also dont want to use aggressive lobes from any of the aftermarket cams. I would not even use a TR 220 just because of the aggressive ramp rates. The only cam I can think of that might out perform the stock 02 and up Z06 cam and not be a huge risk factor would be the GM ASA cam. It is a
226/236 .525/.525 110 LSA.

pwrshhftd

I assume when you said risk.. you meant risk associated with using stock springs.....

what are stock numbers on a z06 cam?
duration, lift, LSA?

What kind of power increase would I see, out of this asa cam?
any part number?
price?
is it worth changing?

Anythgin less than 20-25 rwhp.. would not be worth a cam swap.

97 SC Cobra

I think you may be referring to the ramp rates of the cam with respect to agressiveness. The more aggressive, the harder it is on the valvetrain. He wanted to know the benefits of going with a lower LSA which is better response in the lower RPM range, or so I was told when I ordered my cam from Futral. Either way, the 224 is well received from what I have read.

rb185afm

I believe as long as you already have LT's the average HP increase is 20 hp with an ASA cam over a Z06 cam. I dont remember the Z06 specs but do a search. It is pretty easy to find. And yes by risk I mean having a sping break on you and dropping a valve. I had an ASA cam in my 02 Camaro and loved it, but it is not a cam for everyone. If you want a cam that lopes insanley and makes a ton of torque and HP under the curve it is a great cam. Also due to its low lift it is easy on springs. But the cam will require tunning to get a good idle and max HP. Though all cams really require a good tune to pull all the Hp out of them. I would do a lot of research and deciede what you want out of a cam. A good cam will require good springs and the springs need to be checked every 10,000 ish miles with all of the current High HP cams as they have large lifts and aggressive ramp rates. The ASA was designed by GM for ASA road racing and a lot of guys use it who want an evil sounding cam that makes decent power, but dont want to check and or replace springs every 10,000 t0 15,000 miles. But while the ASA may give you 20 to 25 some of the other aftermarket cams will give 40 RWHP . A good place to research is LS1tech.com.

I think it would be worth changing.You can pick up an ASA cam new from any GM dealer. They run around $380 I believe. I am personaly going with a custom cam for my 02 Z06. I am putting in a 228/232 .581/.591 112 LSA. I am shooting for around 420 RWHP with cam and LT's. I am also replacing the entire valve train with the Patriot Gold dual springs, Titainium retainers, and Chromoly Push Rods. You can get the Patriot springs for around $270.

CJS

I am running the TR220/553/114 with stock 2002 Z06 heads and stock springs for over 11,000 miles and 100's of 1/4 mile runs at 6500 rpms, no problems at all for over 2 years.

GM performance rates the stock springs to .570 lift

Hot Rod Magazine is building a Z06 LS6 motor right now. They have dyno tested it many, many runs using stock springs and a .600 lift cam!

Hope this helps

96CollectorSport

This hydraulic roller camshaft for RPO LS1 or LS6 was designed for showroom stock road racing. It requires the use of 2002 and later LS6 hollow stem intake valves P/N 12565311, hollow stem - sodium filled exhaust valves P/N 12565312, and valve springs P/N 125565313. It features .570" intake and exhaust lift, 251 degree exhaust duration at .050" and 239 degree intake duration at .050". Technical Notes: • Center line of intake lobe means M.O.P. or maximum open point, determined across nose of lobe. • Lobe flank is not symmetrical - for best torque set intake to TDC@105 degree and for best poer set intake to TDC@106.5 degree. • Cam timing @ 0.050" tappet lift (timed @106 degrees intake to TDC) • Exhaust opens @ 51 degrees and closes @ 20 degrees with duration at 251. • Intake opens @ 12 degrees and closes @ 47 degrees with duration at 239.

These are the spec's from gmpartsdepot.com for the showroom stock cam. I think that they really tried to squeeze as much out of the stock valvetrain as thay could with this piece. Not sure if that is the stock Z06 stuff but it sure seem close.

dvandentop

why even swap cam unless ya are gonna swap springs?

LS1Bird

I also have a "cam only" stock heads Formula with TR224 and bolt-ons. I'm using Comp 918 springs and Ti retainers with hardened pushrods and I will say the cam is awesome for being pretty mild.
My full weight Formula which is about 3620 lbs with me in it traps in the mid 118mph range.
If I put a cam in the Z it will be this cam. It's a proven performer and is easy on the valvetrain with the .563 lift and still sounds pretty nice with the 112 LSA.
I can imagine it would be a beast in the Z with the LS6 heads and 400 less pounds of mass coupled to the M12. Damn, I'm gonna have trouble keeping this car stock like I said I would.
oh yea, and the springs would be much easier to change than the dreaded cowl on the Fbody!

dvandentop

i did cam install on my friends SS and 2 z06's they are 5,000,000 times easier with out damn cowl

LS1Bird

Oh yea, sorry, just change the springs for insurance. They're not as bad as you might think to do. I had never changed valve springs ever before I did my cam install in the Firebird. And believe me there's less room to work on the Fbody. It was not that hard with the right tools.

C5 CU

The 228/114* is popular...has good power, requires a little tuning and then has very reasonable street manners....change springs regardless of cam choice.....once you go above 228 then requires "better" tuning plus some sacrifice of drivability. if go below 228 then a little sacrifice of power.

Mopar Jimmy

WORDS of wisdom and I 1000%! IF you go with anything more than like this GM ASA CAM you are courting SERIOUS PROBLEMS/HEADACHES, which could cost you grenading your entire motor. Spend the hundred or two extra dollars and do it right, as this is not the area to be taking shortcuts on!!!!!

Mopar Jimmy

I am personaly going with a custom cam for my 02 Z06. I am putting in a 228/232 .581/.591 112 LSA. I am shooting for around 420 RWHP with cam and LT's. I am also replacing the entire valve train with the Patriot Gold dual springs, Titainium retainers, and Chromoly Push Rods. You can get the Patriot springs for around $270.[/QUOTE]

SORRY GUYS OFF TOPIC BUT:

That sounds like a perfect cam for your Z06 and one i would seriously consider if i cammed up my 02 Z06 with bolt ons and KOOK headers that will be going this season!!!