Hey guys, I am away from home 'till Thursday and can't go jack up my car to look until then, but I was just wondering if anyone knew off the top of their head if there are rubber bushings between the crossmember and the unibody.


I read about the B15 Sentra SE-R guys replacing rubber bushings with steel washers from home depot on their cross members and claiming it reduced wheelhop.

I was just curious, are our crossmembers dampened with rubber bushings as well?

I'm not asking for anyone to go jack up their car and check, I can do that when I get home, I was just wondering if anyone knew off the top of their head.

Thanks!

 

yes there are bushings between the crossmember and the unibody

 

Indeed.

Personally I'd stick with rubber there, a little more vibration isolation from the cabin.

 

Awesome. Yea, I might stick with rubber too, one I thing I love about my car is it performs well but is so silky smooth too, but maybe some day if I am feeling bored I might try shoving some washers in there instead.

When I do it I'll come back to this thread and post up how much vibration comes of it and if it helps with wheel hop at all.

I guess the general idea is that you want to stabilize the engine and transmission as much as possible in the longitudinal direction because when wheel hop occurs that entire assembly rocks back and forth under power each time the wheel hits.

I hear it helps a lot with solid motor mounts as well, but I don't think I am going to do that. The level of vibration inside the car that will come from that can't be good.

 

I went with the es poly bushings for that. The es motor mounts made more way more vibration at idle. Immediately after the install I noticed that my grill was vibrating and you can feel the whole car shake at idle. I also have the es sway bar bushing. Those wouldn't have caused any extra vibration. Could be a compounding thing though.

 

Are the ES poly bushings stiffer than stock but not quite as stiff as just flat out jamming metal washers in?

Maybe I should do something like that. If there is something inbetween OEM and just full out solid on everything, I might be very interested in that.


BTW, with your setup, how is wheelhop?

 

I don't track the car or anything like that so I can't really comment on the wheelhop issue.

The poly is stiffer than the stock rubber bushing for sure. By now your rubber has probably started to deteriorate and become all brittle. That's what happened to mine so replacing with the es bushing was a no-brainer considering the price.