marlyman

Im guessing Timing is the culprit of why my exhaust rattles sometimes when i really try an rip into the high rpms...maybe it has to do with my project isnt finished i just put a cobra intake an a e303 in an i got some aluminum gt40s but i didnt put the heads on yet so i've had to advance my timing in order to get any throttle response..could that be why it rattles at high rpms?

mattdel

Pre-ignition isn't really a good thing, I would take more caution to not drive it like that. And yes, the base timing is too far advanced.

marlyman

why would the car need such an advance on the timing to have any throttle response? is it the cam + intake not matching well twith the stock heads/springs?

craig71springsport

The higher speeds of the exhaust gases could just be enough for something to rattle...But yeah if you're having problems with throttle response to the point you have to advance the timing hardcore, your setup needs refinement. Install your heads, CAI possibly. Bigger throttle body may be in order as well.