XtrmLS1spd

iTrader: (6)

Well, after having my heads installed, I am getting alot of spring and valve chatter. I am using Dual Patriot Gold's and it is very loud. True, I did expect to have some, but not this much. Also, they were heat cycled. Anyone else have this problem with the Patriot Gold's?

Thanks

PREDATOR-Z

That is not a spring issue, it is a geometry issue.
Give your full valvetrain part list

XtrmLS1spd

iTrader: (6)

What do you mean by my geometry? Could my timing chain be off (it's a double rolelr)?

Part list:

Patriot LS6 style heads
Fully CNC'd
Hand Finished
Bronze Guides
Larger Valve Seats
REV 2.02 Intake Valves
REV 1.57 Exhaust Valves
Patriot Dual Gold Springs
Titanium Retainers
Hardened Spring Seats
Super 7 Locks
Viton Valve Seals
Custom 3 Angle Valve Job

Comp Cams .080 wall chromoly Hi-Tech pushrods(7.40 length)

That's pretty much all I can think of.

Also, I have a comp cams custom grind cam. It's a 230/236 592/602 on a 112. Get this, it has NO lope at all. Acts and idles exactly like stock. I am thinking comp screwed the grind up. But, the car pulls hard and that's saying that with me having 3.42's and a trusted street tune.

Any info is appriciated!

XtrmLS1spd

iTrader: (6)

anyone?

AdamSS

iTrader: (3)

Geometry man...

You can't just put some springs and call it a "happy day"

Once everything's installed you need to verify:
spring installed height
Seat pressure
Pushrod length
rocker arms lash, etc....
Also, it's good to degree the cam (not related to your problem, but a very good practice)
If you don't know what valvetrain geometry is, you shouldn't be even looking at doing internal work on Ls1....

PREDATOR-Z

Were your heads milled?? How much?

And what rockers are you using?

XtrmLS1spd

iTrader: (6)

I didn't do this. I had a trusted shop do the work for me. They speacialize in LS1 work and do it every day.

Y2K2LS1

I'm with you, I think the grind may be bad. That big of cam, you should definitely know its there!

XtrmLS1spd

iTrader: (6)

My heads are not milled. They are 59cc to get 11.2:1 compression. I am using the stock rockers.

AdamSS

iTrader: (3)

Well...at this point if I were you, I'd degree the cam to see if it really is what COMP claims to be. With that cam you should have a pretty serious lope....
Something's wrong in the setup...

Here's the link
http://www.iskycams.com/degreeing.html

To check geometry (something you can do yourself very easily) follow this:
http://www.holley.com/HiOctn/TechSer...ECVTTech1.html

PREDATOR-Z

Then I would think measure your pushrod requirements.
7.40 might be a little short which puts less preload on lifters and more clatter.
Once determined a custom set can be made to match the geometry more closely and reduce noise.
Tool required is this:

technical

I hate to say this, but do you suspect there might be a chance that the shop didn't actually install your cam ...and kept it for themselves?

XtrmLS1spd

iTrader: (6)

No... I don't think that's the case Technical. I seen the cam go in myself.

UPDATE: after starting the car up this morning and after a nice 30 minute drive, I brought the car back home with it still making all of the chatter. Turned it off for about an hour and started it back up. It then had much less chatter. Just the norm like all other cammed cars would have. I find this very very weird. It has also now picked up a very slight lope in it. And I mean very slight lope.

I am goign to throw it on a dyno and have it dyno tuned to see what it will do. I still want the lope in the cam though no matter how it performs.

Also, with the street tune, when I hit about 6k it picks up hardcore. You can realllly feel the power kick in.

This situation is very weird. I know and have heard of comp screwing up a lot of cams. They even messed my first cam up!

luv2spd

iTrader: (1)

Is it possible to get a sound clip?

XtrmLS1spd

iTrader: (6)

Not until a few days where I would have access to a camera.