i have an 86 camaro with the 2.8, it's pretty quick for what it is, anyway to the story, i raced a z24 cavalier about a week ago, after i was done i pulled into the gas station, i started my car up, and when you rev it up, you can hear like a knocking noise, it isn't loud but loud enough that i can hear it, and when the car idles i can feel the floor vibrating. i was told this was either: flywheel bolts or a rod bearing?? somebody help me!

 

Or wrist pin.

Check the flywheel. You very well may have toasted your engine, however.

 

My engine runs and drives very well though, It does it once u reach high RPM's, The engine has only 47,000 miles on it!

 

Mileage doesn't matter a whole lot when it's being abused. And, racing is abuse.

Besides, you said the floor vibrates at idle. That doesn't sound like "running well".

It's almost impossible to do a virtual diagnosis. You need to check it over or have it checked over.

 

That's the first time I abused it, I drove it today for about 15 miles, It only did it at high idle, As long as I don't beat it, It don't make the noise