ramblin240

Here's the story:

After cranking the car over one day, heard an awful scraping scratching noise (http://www.youtube.com/watch?v=X6yiJL1ztdk wfs) coming from the engine and after a week of searching, decided to pull the lifters. I pulled them out find out that two of them are quite scarred and ruined, pictures are attached, as well as my cam in certain places.

http://3.bp.blogspot.com/_XefVjqkh21...0-h/lifter.JPG

The motor, 02 F-Body ls1, was installed with a TS 220/220 581/581 Cam with dual valve springs(not sure of the manuf, but i think comp cams) and has lasted me only about 25K miles.

Its daily driven and not really ragged on too much for sake of longevity just fyi.

My plan is to replace cam (was thinking maybe about GMPP ASA) with something compatible with my dual valve springs (I dont want to replace those) as well as install new LS7 lifters and a new oil pump for good measure.

Questions:
Any ideas on better suited cam specs for my setup (dur, lift)?

Is it possible the dual valve springs possibly are putting too much pressure on the valvetrain for my application causing this damage to my lifters and cam?

PREDATOR-Z

This type of damage could be from various reasons. One common is the lifter trays failing and allowing the lifter to turn in its bore. (I cannot determine that from picture alone).
Another is of course an oiling issue (yours sound like this one is likely)
Another is cam hardening not up to specs
Another is lifter bounce from float/bad harmonics

ramblin240

But how about a suitable cam dual valve spring combo?

PREDATOR-Z

I would first try to find the cause of this damage before just changing parts to make sure it doesn't repeat itself.
If indeed it was an oiling issue, you could have (hopefully not) other areas of damage that need your attention.
Go thoroughly through your engine and try hard to fully determine the cause.

ramblin240

Thats why Im asking about my cam/dual valve spring combo. To see if that was the problem...

GIGAPUNK

iTrader: (2)

Many hi performance springs are only good for about 20k miles. You should probably figure on a new set for insurance, at a minimum I'd get them on a spring scale. Lifter trays are only $20, new ones are probably cheap insurance too. What do you use the car for? Everyone that has drifted a stock LSX oil pan 240sx has caused oil starvation.

orangeapeel

iTrader: (18)

Dual springs for that cam is like seatbelts on the couch. It's your car, so if added insurance makes you feel more secure about it not coming apart on you then go ahead. I would worry more about the bottom end for your actual issue than the top end valvetrain first though. Listen to Mark, he knows what he is talking about. But, its all about what you are wanting to do when it comes down to cam selection. Its a daily driver so that GMMP cam that you listed, if its the one I am thinking it is, probably isnt what you are wanting to really do.