ok gearheads, help me answer this; I just changed out the cast iron cylinder heads and performer RPM intake on my 10:1 compression 302 with AFR 185's and a victor jr. The carb i"m running (in both combinations) is a 650 speed demon. so after this head and intake swap i notice a annoying wrapping noise coming from my tailpipes during the first few road miles..then it dissapears. and the engine being up to temp before i leave the house doesnt change it. the car needs to be running for about 15 minutes in the driveway..or a good 7-10 on the road for it to go away..then it sounds normal again. Could this possibly be the exhaust tubing warming up? anyone ever heard of this? carb tune problem?

 

I am stumped....

I can't think of where to begin here......

Annoying rap??

http://www.youtube.com/watch?v=loCxx...eature=related

Just a joke,,,,

 

can you make an audio recording of that or video?

it sounds that it goes away when gearbox/rearaxle are warm if just warming the engine doesn't help. need to hear it though to help putting the finger down