Just wondering if anyone running pro mag rockers who may have gotten fed up with the constant sewing machine noise and tried to use the lt4 corvette composite valve covers to remedy or lessen the problem. I know that the composite covers were designed in part to muffle the valvetraine noise on the vettes... Anyone have any success with this?

 

I'm running Pro Magnum RR's and have very little valve train noise with my stock valve covers. You may need to readjust your lash. I'm sure the valve covers will help too.

 

I've got the Pro Mag 1.6 and the notorious Comp R lifters.. Topped it off with the proform cast aluminum valve covers (black satin finish). Aluminum transmits more noise than the steel, but rather than taking a step back, I've been thinking about the composite ones.

WIth regards to lashing, the damn comp R's (my fault, I bought them) are so finniky.. I've adjusted them a bunch of times over the past few years, even with the engine running and can tell a difference between a noticeable tick when theye are too loose, and the clank when too tight.. So I'm pretty sure they are dead on and its just a result of my particular parts setup...

 

I have Scorpion 1.7 RR and I read somewhere you might be able to use those composite V/C to fit them without having to clearence the covers. Does anyone have any input on this?

 

Well i have the GMPP 1.6RR on my car,and although they are not that loud i got the LT4 composite valve covers thinking they would quiet them down more and they really did not help too much.