Originally Posted by rmerchant3

There is finally a solution to the vibration issues that accompany this kit from the engine mount design. I'd venture to say that the vibration isn't as bad as most aftermarket mounts (save Vibratechnics) but for me it was unbearable coming from factory mounts. My defrost vent, A/C panel, side mirrors, and various other interior rattles were driving me insane. As soon as I fixed one, another would show it's face. It was to the point that I was seriously considering a sidewinder manifold setup to be free from the nonsense. But that in itself presents heat issues and other complications. Give up one flaw and gain others as they say.

Well, RAIN H8R and I have been bouncing ideas back and forth about how to solve this issue, or at least make it better. The first attempt was made by myself, as I was desperate to come up with a solution. I removed the mount and drilled a total of four 7/32" holes. You can see the holes and their location here...



I drove around on that for a couple of months and it was better, but still not enough. Id say it wasn't worth drilling just the holes alone honestly now that I think of it. Dustin then decided to drill holes in his mount, but in a different location using a 3/8" drill. This was his result.



He seemed to have the same feelings about his modification as I did about mine. Better, but not significant enough. So the idea was suggested to cut some of the insert away from the middle where the two halves meet by Dustin. Again, It was driving me nuts so I took mine back out and commenced to cutting my mount. I decided to take 1/8" off each half as seen here...



You can see the difference in sizing here...



This is with one insert in. The scribe mark you see on the aluminum housing is where the original uncut inserts sat.



Not the best of pictures, but this shows the gap created by cutting the inserts with both of them reinstalled. I decided that while I had it out, I would add two holes to the bottom and one hole at the top in 1/4" sizing as can be seen here.



The results...night and day difference. Granted it has been in the mid 70s to mid 80's since I did the modification, but it idles at near stock smoothness now. Under acceleration it feels better too, but not as big of a difference as it does at idle. That wasn't my area of concern though. Steady cruise and idle was where the vibration issue needed to be addressed. I had a passenger that rode with me prior to the modification comment on how much of a difference it made too.

If I had to do it over, I would cut the insert first and not drill the holes. I believe the compression of the inserts is the most significant area of concern. The holes MAY have helped, but they could always be added later if needed, plus it would be easier now that your insert would be shorter. Use grease when assembling the inserts, as it makes the job much easier. Hope this helps some of those who can't live with the vibration like me.

Now on to this pesky boost creep issue!