Our Noisy Valvetrains
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
O WOW, I was under the impression that each turn was about .048 to .050. I will be checking pushrod length tomorrow. I will also be investing in a melling oil pump and cloyes timing set. Then rockers. Man, I wonder what the hell causes the noise. It seems there MUST be a gap somewhere.....
Also, I am using a lunati voodoo cam. part #60511
Also, I am using a lunati voodoo cam. part #60511
Intermediate
Joined: Mar 2007
Posts: 35
Likes: 0
From: houston texas
I agree with Vettenuts. It seems that after I installed the Fast. The noise got worse. I own a 66 Shelby. If I had the same nosie in the Shelby I sure would be adjusting the lifters. It has solid lifters too.
Being from the old school. The nosie usally means something is wrong. LOL
Being from the old school. The nosie usally means something is wrong. LOL
Pro
Joined: Aug 2007
Posts: 619
Likes: 1
From: ATLANTA GA
I agree with Vettenuts. It seems that after I installed the Fast. The noise got worse. I own a 66 Shelby. If I had the same nosie in the Shelby I sure would be adjusting the lifters. It has solid lifters too.
Being from the old school. The nosie usally means something is wrong. LOL
Being from the old school. The nosie usally means something is wrong. LOL
Get used to it, because youll never get it to go away without going back to a stock like cam.
Thread Starter
Instructor
Joined: Jun 2008
Posts: 220
Likes: 0
From: Somers Point New Jersey
Each turn on the bolt is 1.25mm or 0.049" (your number). However, because you are tightening at the fulcrum of the rocker, you must account for the pushrod movement through the rocker ratio using parallel triangles (movement at the fulcrum is magnified at the rocker). Thus, each turn is multiplied by (2.7/1.7) or approximately 1.59. This is because once the lifter bleeds, the valve spring won't move it is the lifter plunger that must move. So the net affect is each turn of the rocker bolt is approximately 0.078". Since you have almost two turns on the rocker bolt, you are likely running a very large preload and it should be checked using an adjustable pushrod.
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
Mine is loud also, I hate how it sounds. I have done everything to try and quiet the valvetrain and nothing works. I hear there a two things that will help, a loud radio and super loud exhaust. I may have to check in to that.
