Whistlin' Dixie

[Jeremy R King <kingjer@eng.auburn.edu>]

I remember somebody mentioning a test drive of an Ur-Q a while back where 
the car sounded like a turbo - ie it whistled.  I've recently noticed a 
whistling from my atmospheric 10V I5 in higher rpm's (4000 up) under 
heavy load.  It's VERY noticeable with the windows down.  I can't check 
to see where it's coming from because it only occurs under load and 
revving the engine with the hood up does nada.  Any clues/experiences?

On a maybe related note.  In the last week I've noticed a quiet clunking 
sound eminating from the exhaust pipe.  Today it was very distinctive, 
and coordinated exactly with the knocking from my vaccuum pump.  It's 
definitely a sound that originates in or just out of the engine, not 
something mechanically clunking in the exhaust itself.  It may clear up 
after the car's warm (sure seemed like it, but I haven't had enough 
experience with it yet to know if it's from the car being cold or not).  
If anybody has any ideas, I sure would be happy to hear them.  I'm a 
pessimist and figure I'm about to burn a piston or something.

TIA

Jeremy
'86 Quantum GL5