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Trailing arm bushings, I needs 'em
Posted 06 February 2013 - 11:27 PM
I was thinking of Group N bushings, but think those might be too tough still. I want SOME pliability, just not as much as the stock bushings. Wondering if WRX or STI bushings are like the happy medium? Or should I just go for the group n bushings and save like $20? (They cost less)
Posted 07 February 2013 - 06:54 AM
Posted 07 February 2013 - 11:48 AM
Gary I went to the dealer and checked a set of new stock bushings and they were pretty soft. They didnt have the WRX bushings in stock and didnt want to order them unless I paid for them.
I figured they must be a little stiffer than the Legacy bushings but I'm trying to figure out just how much stiffer are they before I order them.
The group N bushings are actually the cheapest of the bunch at only about $19 per. And I know those will be pretty solid, but does saving $10 mean I'm gonna feel every time the rear wheel runs over a caterpillar in the road? The group N motor mounts I bought transfer a ton of nvh, I can only imagine the other bushings will be the same way.
WRX bushings are right in the middle at about $25 per.
Stockers are about $30 per.
This is only the front bushings, the rear bushings seem to be fine.
Posted 07 February 2013 - 01:04 PM
I don't think the Group-N bushing NVH will be a big deal. You could also do the zerk fitting with urethane (like I did) if you're worried about wear. I do agree though that urethane is not ideal for a lot of applications.
Posted 07 February 2013 - 11:28 PM
Here's a question I haven't found a clear answer to, are stock STI bushings already Group N? Or is the Group N set the next step above stock STI?
Posted 08 February 2013 - 12:22 AM
The urethane will increase road noise somewhat and transfer more high frequency vibration, but I've never felt it made bumps any harsher as those are relatively low frequency. My car doesn't have any soft floaty feel like yours, but I feel it handles fantastic both on pavement as well as off-road. A few weeks ago I was on this dirt road with large holes all over it, about 6" deep on average. I was pleased with how fast I was able to go while maintaining complete control and no harshness. Then I finished out the drive on smooth curvy tarmac pushing well over the ton.
Opposedforces shows the front trailing link bushing on the STi as 20254FE000, and it's unique to the STi. The link below shows the same part number as a Group-N part.
Posted 08 February 2013 - 02:09 AM
Dunno how accurate his tester or test procedure is, but the scale should be pretty close.
Thanks for the link. I was comparing opposedforces part numbers with SP4Ys SPT parts list and they show different numbers. But reading threads about group N bushings some people said they had the same part numbers as the STI listings. Subaru shows different list prices for group n and STI bushings though.
Posted 08 February 2013 - 08:31 PM
WRX, RS, TS, Outback impreza, and Forester share a different front bushing.
STI uses its own front bushing apparently, which appears to be the group N equivalent. Trying to find pictures of them is more difficult than I though it would be.
Either way. The STI stock front bushing lists for $17. The "Group N" lists for $24.95. Which one you think I'm buying? :-P
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