Front End Suspension Kit - Polygraphite or Rubber ?

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RPMagoo

RPMagoo

Just An Old Motorhead
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I'm planning on a rebuild kit for the front suspension on My 65 Valiant. Currently the suspension is loose - rattles & clunks. I guess because it's a 51 year old car with ?? miles on it. -- I'm leaning toward the Basic Rubber Kit from PST. -- The car is just a casual, fun/cruiser - not a Drag Car etc. - Is there any, compelling, reasons why I should choose a Poly Graphite Kit over a Rubber Kit ?
 
Even though I have poly in everything but the motor and trans mounts I have to agree with wanta68cuda.
No point in making a casual cruiser have more road noise through it.
 
TrailBeast said:
Even though I have poly in everything but the motor and trans mounts I have to agree with wanta68cuda.
No point in making a casual cruiser have more road noise through it.
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I am about to commit to either rubber or Poly? Weekend cruiser and fun driver. Tell me more.....I thought with todays technology I'd be better off with poly but your making me think factory will be fine for my pretty much stock 340 Duster.
 
gtgto said:
I am about to commit to either rubber or Poly? Weekend cruiser and fun driver. Tell me more.....I thought with todays technology I'd be better off with poly but your making me think factory will be fine for my pretty much stock 340 Duster.
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However you go, use rubber lower control arm bushings. Moog
 
gtgto said:
I am about to commit to either rubber or Poly? Weekend cruiser and fun driver. Tell me more.....I thought with todays technology I'd be better off with poly but your making me think factory will be fine for my pretty much stock 340 Duster.
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Personally I think the polys are good for a hard run car because they are tougher and have less give to them.
The reason I used poly in my suspension and not the mounts is that I drive the crap out of my car and sometimes I'm pretty rough on it.
I hit driveways and dip into corners where pavement is missing, along with the roads here sucking anyway.
Bumps dips and rough surfaces are common here, so I knew the suspension was going to get worked pretty hard.
BUT I didn't want all the normal drivetrain vibration going through the car as well, so I suspended the engine and trans with rubber.
My car has spool mounts at all three points and I figured I would take advantage of their forgiveness in the vibration dept.
Poly allows an approximate 1/16 toe because it doesn't give as much under a load as rubber so poly strut rod bushings were used.
 
you have couple options, you can either replace your bushings with 3 basic types of bushing material: Rubber, Polygraphite or Delrin. If you are looking to renew your car’s ride to “factory type handling” which is good for daily driving and cruising, rubber bushings are the way to go. Rubber Is great at acting as a insulator between you and the road and this provide a quality/comfortable ride. But rubber has its downfalls to. The main thing is that it dampens by deflection and deflection affects response of your suspension or how quickly it reacts to changes in the road. The way to combat this is with the material Polygraphite. Polygraphite is polyurethane that was been mixed with graphite so that is self lubricating. What makes Polygraphite better than conventional rubber is its durometer rating or the rate at which it compresses. Less compression yields less deflection which equals better response, more feel of the road and less body roll, meaning firmer planting of the tire on the road. Polygraphite is a happy medium between rubber and delrin as it has a slight give to it so the ride is not harsh but not yet as firm as delrin. The best way to describe Polygraphite is that your muscle car will have a modern day car feel/handling. Polygraphite is ideal for street and track use. Delrin is best for track use. It has minimal gives and allows a fluid motion through the suspensions range of motion, but lacks ride quality. The ride tends to be harsh and you will feel every imperfection in the road.

Thanks
James
 
PST said:
you have couple options, you can either replace your bushings with 3 basic types of bushing material: Rubber, Polygraphite or Delrin. If you are looking to renew your car’s ride to “factory type handling” which is good for daily driving and cruising, rubber bushings are the way to go. Rubber Is great at acting as a insulator between you and the road and this provide a quality/comfortable ride. But rubber has its downfalls to. The main thing is that it dampens by deflection and deflection affects response of your suspension or how quickly it reacts to changes in the road. The way to combat this is with the material Polygraphite. Polygraphite is polyurethane that was been mixed with graphite so that is self lubricating. What makes Polygraphite better than conventional rubber is its durometer rating or the rate at which it compresses. Less compression yields less deflection which equals better response, more feel of the road and less body roll, meaning firmer planting of the tire on the road. Polygraphite is a happy medium between rubber and delrin as it has a slight give to it so the ride is not harsh but not yet as firm as delrin. The best way to describe Polygraphite is that your muscle car will have a modern day car feel/handling. Polygraphite is ideal for street and track use. Delrin is best for track use. It has minimal gives and allows a fluid motion through the suspensions range of motion, but lacks ride quality. The ride tends to be harsh and you will feel every imperfection in the road.

Thanks
James
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Thank You James....I will be ordering from you guys soon. To get the 10% discount for bring a member here I need to call to place my order right?
 
You can call or place online. You just need to put in the notes section your username and states that you are a member of the forum.

Thanks
James
 
Although I don't t have many miles on my 72 demon since installing PSTs polygraphite bushings (500 mi. maybe) , I have not noticed any noise or vibration. Also with the addition of bilstien shocks from them I find the ride to be very good.
Yote
 
I went with the full rubber front end kit from PST because my car is not meant to be a road warrior, just a comfortable street cruiser. The rubber is a little bit quieter and a little less harsh.
 
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