i have a 91 305 in my camaro all carbed no computer.automatic.vortec style heads
give it anything over 3000rpm it chatters sounds like little wind up monkey with tamborine in my motor im sure its in the valves because its in the passanger side only,and accelerates with the motor.its drivin me nuts,im afraid to take it over 3k thinking ima bend a pushrod

valve float?
worn valve guides?
timing advancing to far under throttle?
any suggestions would be greatly appreciated

 

Is it a regular higher pitched ticking (valvetrain, exhaust leak), regular lower pitched knocking, (bottom end), or irregular marbles-in-a-can (pinging/detonation)? Winging the throttle in neutral, or only under load? Got a video?

 

only does it in drive when car gets to op temp(180) cant get camara to pick sound up to much going on and sounds run together,to describe it some more its like a vary fast "tat" noise

 

At a guess, valvetrain or exhaust seems most likely. Given it's temp related, might be a header gasket cracking open a hair once the manifold gets hot - are the bolts tight?

Check lifter preloads, perhaps one's opened up, or a stuck lifter. Or maybe a worn out valve spring, causing very early valve float. Can you isolate where the noise comes from?

 

only does it in drive so i cant pin point where its coming from,valve seals have been done cant get a audio of it to much goin on when sound starts,but when its completely cold until it hits about 150 on temp guage it wont do it once it goes over 150 and i push rpms to 2500 or more it starts "tat ing"maybe detonation?