Loud valvetrain
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Loud valvetrain
Is it normal to have a very loud valvetrain with a Duration 232/236, Lift 595/601 camshaft?
I have a LS1 with this cam and it is unbelivably loud, and several people that I have spoken to, said that this is normal due to the cam specs. But I have never heard one this loud.
It is so loud that if it is normal, I am going to change it to something else.
I have spintech mufflers and you can't hear the exhaust until you get up in the RPM's
Thanks
Tom
I have a LS1 with this cam and it is unbelivably loud, and several people that I have spoken to, said that this is normal due to the cam specs. But I have never heard one this loud.
It is so loud that if it is normal, I am going to change it to something else.
I have spintech mufflers and you can't hear the exhaust until you get up in the RPM's
Thanks
Tom
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It is definately normal but you can quit them a bit by installing the right length pushrods. Get a pushrod length checker ($20) and you can have it done in 30-45 mins. It helps but you will always have some.
Cheers!
J.R.
Cheers!
J.R.
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The valvetrain is stock with the exception of different length pushrods for the cam.
So, changing the rocker arms, and other valvetain components won't address this issue?
Tom
So, changing the rocker arms, and other valvetain components won't address this issue?
Tom
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You really don't want to even run that cam with stock spings. If you get on it at all it will likely float the valves and destroy your motor.
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Also, if that is a comp grind you probably need 7.425" pushrods. You can check the length with a pushrod length checker but it's hard to do without having a dummy (solid) lifter in place.
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Yea...I would be amazed if you didnt have broken springs all over. Pull those valvecovers and have a look. Are you sure they are stock springs? How did you ever get the know how to do the swap without knowing about the springs?
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I had someone do the work for me and apparently, I've been had.
I will pull it apart and check it out.
I will post on the outcome when I can get it apart.
Thanks for all your help.
Tom
I will pull it apart and check it out.
I will post on the outcome when I can get it apart.
Thanks for all your help.
Tom
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So the guy just put in a cam and didn't even consider the valve train???
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No, I paid him to port the heads and add the cam, and he said that everything that was needed was included.
When I picked up the truck, I thought it was loud, but he said that was normal for that size cam to have a loud valvetrain.
When I went to the strip with the truck, I was noticing some camaros and such with heavy cams that were nowhere near as loud as mine, which in turn sent me on this search.
So here I am, apparently stuck in the ***.
We will see very soon what the outcome is.
When I picked up the truck, I thought it was loud, but he said that was normal for that size cam to have a loud valvetrain.
When I went to the strip with the truck, I was noticing some camaros and such with heavy cams that were nowhere near as loud as mine, which in turn sent me on this search.
So here I am, apparently stuck in the ***.
We will see very soon what the outcome is.
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If he ported the heads he had the valves out and he likely performed a new valve job. If he has this much knowledge he would know about valvetrain relationships in general...are you sure the springs are stock? I find that hard to believe. I can see a miss on the pushrod length, but to have porting knowledge, even a basic knowledge he would surely have replaced the springs with something that supports the cam specs.
Have you asked him about the springs?
Have you asked him about the springs?