Edlebrock head flow #

[SFfiredog]

Originally posted by priobe


Thank you SFfiredog for the explaination.

Whats usually the problem with the vavle springs and the distributor gear.

I know when they were building the motor they changed the gear but I am not sure what the springs were I think Titanium, does that sound right.

I know they make titanium valves.

Is there anything I could do to prevent any damage?

There is any "damage" per se, but just more maintenance to perform.
The original distributor gear is cast iron which is not compatable with the billet steel of a roller cam.
The roller cam distributor gear is made of a bronze alloy that is "sacrificial", that is, the gear is designed to wear instead of the cam. Average life of a bronze distributor gear is between 10 to 20k, some more, some less.
Roller cam valve springs have a harder life than a flat tappet spring. They have a higher spring rate and the rapid opening and closeing rates of a roller cam (solid roller) build up more heat and fatigue the metal faster than a flat tappet spring.
The better the spring (read more expensive) the longer they last.
I have seen roller springs last 30k miles but on average it is much less. Your roller cam is relatively mild and I would expect long life for your springs as long as they are high quality.
Maintenence and inspection is the key to the longevity of your engine.