View Full Version : Roller Rockers
jwebb
12-07-2017, 05:01 PM
Are roller rockers louder than conventional rocker arms? Now that it's running smooth again (hitting on all 8) my hearing is focused elsewhere...
japollon
12-07-2017, 05:05 PM
In my experience, especially with American V8s, roller rockers are no louder than conventional rocker arms. I am not sure they are any quieter, but certainly no more noisy.
Never noticed them to be noisy but then again, everything I had with roller rockers was a performance build and had an exhaust system that was loud enough to mask most everything else.
Avalanche325
12-07-2017, 06:39 PM
No. They are not louder.
Solid lifters are louder than hydraulic, which is really mostly noise at the rockers.
TexasAviator
12-07-2017, 07:26 PM
all modern engine run roller rockers. Also the rocker design can be noisy given a particular style. Comp cams makes a lighter high rev version that is all steel and thinner. They can chatter a bit. If you buy large aluminum roller rockers that are typical such as comp, scorpion, etc. The aluminum acts as a sound absorber because aluminum is not as dense a material. Almost quiets the rockers vs what I have run in the past. They dont have to be expensive either. Simple aluminum natural finish comp cam rockers in the 1.6 flavor were only 150 dollars for all eight in my engine build.
Mine are louder; Harland Sharp, AFR heads with stiff springs. Mine clatter, a mechanical sound
jwebb
12-13-2017, 02:58 PM
The "clattering" was reviewed by the engine builder and he says what I have is normal for the build, he did mention a exhaust leak @ header/head mount that could have contributed to my concern. Seem to hear some mechanical noise from the exhaust, any history with loose insides??
jwebb,
This is sorta funny now but wasn't at the time. Initially, they all seemed quiet and than they started getting louder as the lifters "pumped up" I guess. (Trickflow heads with Ford Racing/scropion roller rockers). I starting hearing a knocking sound, which horrified me since I assembled the engine. Anyway, touched the valve covers and could feel the knocking. Even though I had bought aluminum valve covers for roller rockers a few casting humps were being hit by a few of the rollers..... Ended up shaving those areas (two per cover) and everything seems fine again.
scottiec
12-15-2017, 06:13 AM
Glad to hear! Always nice when it’s the simple things