Originally Posted by bolus
I removed the balance shafts and the vibration isn't that bad. And I have an Atom where the engine is bolted to the frame and the frame is bolted to a racing seat.
The first 500 miles or so I saw a vibration at 3200 rpm that would make the mirrors vibrate enough to make it hard to see (like a deep bass from a stereo). Now for some reason, it seems less
plus my girlfriend really likes to ride along now.
I respect you, so don't take this the wrong way, but there's no real way to compare an Atom to a Cobalt in any category. LoL
Originally Posted by JapEatr
They can be done without removing the head, the vibes at 3200 are what i have heard before, not the insane craziness people think
I have the GM ones(pretty damn heavy) goin in my build
I know your comment isn't necessarily directed towards me, but I do want to throw my 2 cents in here.
Everyone has different tolerance levels. The more you modify an engine, the more OEM drive-ability and street manners you are likely to compromise. I had a straight through 3" exhaust (no muff, lol), poly trans bushings and TTR upper mount for quite some time. Really wasn't THAT bad to me. It was usually the typical "A/C and idle is where it's noticeable" kinda thing.
Then I switched to the Powell rotated mounts/stock upper and threw a muffler out back and mother of god did it get much, much more comfortable. Threw a turbo on there and it got even a little more tolerable. I noticed and heard things that I completely forgot about, lol.
I guess my point here is that as car fanatics, we tend to adapt quite well. After your build, you probably won't think it's THAT bad. Do me a favor after a few months; though, and go ride in a bone stock 06 LSJ. I'm sure you get my point...