Quote:
Originally Posted by Keith Seymore
Engine firing frequency!
When you say "rotational due to the harmonics you feel" does that mean it comes and goes?
If you are feeling it increase and decrease: that's a "boom/beat", which indicates you have two root causes. The increase and decrease is a result of the two out of phase amplitudes adding and subtracting. You would need to isolate and eliminate one of the root causes.
Does that sound like a good description of what you are experiencing?
K |
Engine frequency? I have had 3 different engines in this car over the years and the vibration is the same.
It starts out as a pulsating vibration and as speed and rpm increase so does the vibration, I guess at higher speeds and rpm the frequency of the pulsations increase making it feel like one steady vibration, this car at 90-100 vibrates a lot, just feel it through out the car. Because I have changed out all the drive train components over the years is why I was questioning the drive shaft angle or some thing related, It's a new drive shaft but who says its balanced correctly, I'll rotate 180 and see if any thing changes. this vibration has been with this car since I restored it back in the 80's, I was really hoping it would go away with the new drive train, and it has not. Maybe it's time to tear in to the rear end as well?? I bought it rebuilt from a guy that does rear ends, 12 bolt 3:55 gears. Thanks Keith