Cheap Sub-Frame Fix?

[Digitalwave]

So how much stiffer are the street urethane bushings compared to the stock ones? I need to replace my rear subframe bushings and was just going to go with the stock ones as I do not want to make the ride too harsh or introduce too much road noise.

They are stiffer but you are not going to notice anything negative. They are also a lot easier to install.

[DaN]

I'm curious how these will work in new bushings.
I was also thinking about filling up new ones with epoxy or something, before installing them. Did someone say they used delrin? How does that process work?

[MarkH]

So which urethane street bushing do people recommend? Both IE and BavAuto have models for street use.

[Digitalwave]

I'm curious how these will work in new bushings.
I was also thinking about filling up new ones with epoxy or something, before installing them. Did someone say they used delrin? How does that process work?

If you are replacing your bushings why the hell would you do new OEM ones and then try to strengthen them when you could just buy urethane or delrin? I can see this strengthening crap if you want to leave your old bushings in, but not if you are replacing them....

Mark, I have the RTRS bushings that BavAuto sells and they are great.

[DaN]

I would like them to be slightly more rigid than stock. Getting rid of the empty area in the bushing seems like it would greatly reduce deflection, without creating much harshness. Plus I already have subframe bushings that were free.

[rs4pro3]

The E28 guys commonly, take the stock bushings, and fill the voids with urethane, makes the bushing stiffer but keeps the stock ride quality for the most part.

[RobertK]

I explained the PVC "reinforcements" with my old high school buddy who works for the Grayson BMW $tealership as tech here in Knoxville and he didn't seem to see any problem with it especially when he compared it to the time they spend doing the OEM replacement job and how much they charge at the $tealership to do the job.

[Dave]

The ie bushings are 53.00 for the set seems false savings to me.

They are 80 for street, 98 for race. Where do you see them for $53? The TA bushings are $52 - maybe you got the two confused?

[parkerbink]

My mistake I thought these were TA's sorry

[Dave]

My mistake I thought these were TA's sorry

Its still only a $50-60 difference. Your point is still somewhat valid.

[DaN]

The E28 guys commonly, take the stock bushings, and fill the voids with urethane, makes the bushing stiffer but keeps the stock ride quality for the most part.

How do you go about filling them with urethane?
Is there a two part mix that can pour in? not familiar with the properties of urethane.

[rs4pro3]

Yep it's a mix they pore in, just tape off one end pour in the urethane and let it sit a while. Pop on and enjoy, a few have been able to do it with everything still on the car.

[parkerbink]

After re reading the ad seems you could just make these yourself. He makes them in his garage why couldn't anyone?

[DaN]

After re reading the ad seems you could just make these yourself. He makes them in his garage why couldn't anyone?

Sure, buy short length of pvc pipe, cut with tin snips.

Yep it's a mix they pore in, just tape off one end pour in the urethane and let it sit a while. Pop on and enjoy, a few have been able to do it with everything still on the car.

Where would I get the urethane mix?

[nando]

it's not about tracking your car at all, it's about cheap ass ghetto "fixes" you guys are talking about all the time. no wonder most E30s are total peices of shit..