K-member Isolators: Poly or Solid?

Posted By: 2ndopp

K-member Isolators: Poly or Solid? - 05/04/11 01:09 AM

Alright, I'm just about to order my replacement K-member Isolators and some of you have already recommended going solid for sure. I was going to grab the Aluminum ones from: SolidBushings.com But before I go through with the order I just want to ask has anyone heard of people being unhappy with the solid ones? My father is helping me with the install and he is insisting that Polyurethane would be the better way to go. The car is a 73' Plymouth Satellite.

Posted By: dOrk !

Re: K-member Isolators: Poly or Solid? - 05/04/11 01:12 AM

DON'T they have the real-HARD poly ?

Posted By: SattyNoCar

Re: K-member Isolators: Poly or Solid? - 05/04/11 01:37 AM

Is your car a factory big block car?

Reason I ask is that factory big block cars have a HUGE cutout on the passenger side inner fender. My wagon is a factory big block car and I put solid mounts in it. Made a noticeable difference for the better over the factory rubber isolators. There just isn't much support from the inner fender on the pass side on these cars.

Think of it as putting subframe connectors in except that you're tying the (front) rails together side to side instead of front to back. How are subframe connectors usually mounted?

Ride harshness is no different than a '72 - back Mopar. My wagon was a daily driver for 5 years with the solid mounts.

Go solid. My

Posted By: chargincharles

Re: K-member Isolators: Poly or Solid? - 05/04/11 02:30 AM

Quote:

Alright, I'm just about to order my replacement K-member Isolators and some of you have already recommended going solid for sure. I was going to grab the Aluminum ones from: SolidBushings.com But before I go through with the order I just want to ask has anyone heard of people being unhappy with the solid ones? My father is helping me with the install and he is insisting that Polyurethane would be the better way to go. The car is a 73' Plymouth Satellite.

I've had a set on both my 73 Charger and my last M-body.
The Solids are the best. They are a huge improvement over the factory sponge rubber isolators. They really just turn the car into the pre-73 suspension. I have done the Poly route as well or a late 70's F-body- and really, they are no easier to install, and really offer no advantage over the solids. Plus- the guys at SolidBushing.com are really the best. Well made part, quickly shipped, and if you have ANY issues at all, they are really johnny-on-the-spot. Never heard anything bad about them or their product.
Planning on putting another set on my next M- which should be sometime this summer.

Do it. You'll love the results.....

Just my pennies,
CC.

Posted By: 2ndopp

Re: K-member Isolators: Poly or Solid? - 05/04/11 04:53 AM

I notice a lot of people say it's no harsher a ride than 72' and earlier, but I'm not sure what that feels like. I've only ever owned my 73, it was my first car and I've kept it 13 years now. Has anyone ever said its an unbearable increase in road feel? Thats what my father thinks will happen. I'm thinking it won't be that bad, but only you guys really know.

I know the performance increase out-ways rough ride increase, I'm just trying to get an idea of how bad

Thank you guys so much for the info

Posted By: RonP

Re: K-member Isolators: Poly or Solid? - 05/04/11 06:08 PM

I am re-doing a 73 satellite right now and this is what I ordered.

http://www.summitracing.com/parts/PTP-4-101-BL/

I am sure these will be just fine and an upgrade over stock. As good as billet? probably not, but I couldn't see paying that price for the use the car will actually get.

My k-member is off getting blasted and painted, but before then end of may, i hope to have the car sitting back on the front suspension.

Posted By: NachoRT74

Re: K-member Isolators: Poly or Solid? - 05/04/11 07:01 PM

I would go Poly... the best of both worlds in one assembly.

Posted By: IMGTX

Re: K-member Isolators: Poly or Solid? - 05/04/11 07:10 PM

I went poly and I am very satisfied.

Almost 10 years and over 100K and they look like new.

Posted By: 440newport

Re: K-member Isolators: Poly or Solid? - 05/04/11 10:21 PM

Quote:

I notice a lot of people say it's no harsher a ride than 72' and earlier, but I'm not sure what that feels like. I've only ever owned my 73, it was my first car and I've kept it 13 years now. Has anyone ever said its an unbearable increase in road feel? Thats what my father thinks will happen. I'm thinking it won't be that bad, but only you guys really know.

I know the performance increase out-ways rough ride increase, I'm just trying to get an idea of how bad

Thank you guys so much for the info

I've had the solid bushings on my Mirada for about a year now and in my opinion the ride didn't get any harsher at all. The only thing I notice is at idle you feel a little more vibration from the engine, but nothing I would consider annoying.

Posted By: Magnumguy

Re: K-member Isolators: Poly or Solid? - 05/05/11 03:39 PM

Go solids all the way. Gary (solidbushings.com) is a trustworthy seller.

I know someone who had polys. Changed to solid as the poly's got "hard" and squeaked some, and deteriorated.

Posted By: 2ndopp

Re: K-member Isolators: Poly or Solid? - 05/08/11 09:41 PM

alright, looks like i'm going solid

Thanks for the advice guys