Worn cam?
Thread Starter
Drifting
Joined: Aug 2002
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From: Lancaster CA
Worn cam?
My 97 LS1 is rated at 345hp @ 5600 and 350 @ 4400. My last dyno runs, about 80K miles, indicate max hp @ 5700 and tq @ 4200??
Could this be an indication of a worn cam? I'm coming up on 88K miles. It runs great but idles a little rough when hot. Plugs and wires are fairly new, (less then 20K miles).
Mods are in sig. Dyno run was before adding the X-pipe and stingers.
:cheers:
Could this be an indication of a worn cam? I'm coming up on 88K miles. It runs great but idles a little rough when hot. Plugs and wires are fairly new, (less then 20K miles).
Mods are in sig. Dyno run was before adding the X-pipe and stingers.
:cheers:
Tech Contributor
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From: Charlotte, NC (formerly Endicott, NY)
Re: Worn cam? (davidfarmer)
Those numbers do not look bad. However, you may want to think about the rev limiter being set to 6500. The HP curve on a car with bolt on mods is going to fall off some by 6500 rpm. I tried bumping it up on my car a couple of years ago since I kept hitting the 6250 rev limit when I was on the track. Once I bumped it I kept hitting the 6500 limit. Then I decided to start shifting when the tach hit 5700 and the seat of the pants acceleration was much better. Since the tach reading is slow I was probably shifting around 5900. Since then I have put the rev limiter back to 6250 and haven't been hitting it very often.
Bill
Bill
Thread Starter
Drifting
Joined: Aug 2002
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From: Lancaster CA
Re: Worn cam? (davidfarmer)
that is typical. If you have a worn cam already, then you have some other oiling problems going on.
Nothing else indicates any oiling problem.
:cheers:
Thread Starter
Drifting
Joined: Aug 2002
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From: Lancaster CA
Re: Worn cam? (Bill Dearborn)
The HP curve on a car with bolt on mods is going to fall off some by 6500 rpm.
Since then I have put the rev limiter back to 6250 and haven't been hitting it very often.
Bill
Since then I have put the rev limiter back to 6250 and haven't been hitting it very often.
Bill
Thanks for the advice.
:cheers:
