Quote:
Originally Posted by DanEC
Anyone want to venture a guess as to if there will be any noticeable change in engine vibration/noise with these?
I'm weighing whether I really need these with my under-car exhaust. But, the exhaust system is pretty rigidly mounted and doesn't need a lot of engine rocking to work on it. And I do worry about air cleaner contact when the motor torques over - so possibly.
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OK, I will guess. I think you will have more engine vibration in the cockpit. I don't know if you will have more or less car movement though. I have the stock setup with the limiter bolt and my car moves right along with the cam. I actually love that , just like my Harley. I would not call that a vibration though! That to me is just old school HOT ROD, cam duration rock and roll.
On my bike the motor mount is adjustable, it actually has a Torque range, anything tighter then the lower end of the range and the bike had a very unfriendly buzz or vibration. At the lowest torque, it is beautiful. I think this may relate to this situation.
As far as the air cleaner hitting, I would say you have nothing to worry about and that is coming from a very scary experience I had with my car after only owing it for a week. I will cut to the chase and just give you the jist of the story and spare all the details. I nailed it in first gear going up my long steep driveway. I was used to doing this all the time with my first Cobra. The gas pedal stuck right to the floor. It was my lucky day though because I ended only having minimum damage to my car and I am still alive to talk about it. I will leave it at that to keep it short. So after all the troubleshooting, my driver's side motor mount was completely loose. So between all the Torque of the FE, being in first gear, the very steep pitch of my driveway and the loose motor mount. The motor Torqued over locking up all the throttle linkage in the full open position...YIKES!!!
So, my point is that no contact was made air cleaner or turkey pan to the hood in an extreme Torque over situation. I don't know your setup. I have dual plane manifold, Holley 750, 9"K&N breathable top air cleaner 2" high with a wing nut hold-down. Now there is no chrome cover on this air cleaner because of the breathable top, so it is possible that it might have hit the hood and not done any visible damage.
I know you are not worried about the side pipe damage because of your under-car exhaust, but for everybody else it matters. I do have the damage to both the openings for the side pipes in the fenders. I have seen this on many ERA cars while I was shopping for my car. It was on my car too, but mine definitely got a little worse after the accident though. A tribute to the ERA quality of the body is that there are no cracks! Easily smoothed and touched up. Not really noticeable at all, part of the patina of a driven car as far as I am concerned...but that is just me.
These motor mounts sound good as long as I do not get that awful buzz vibration.