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Phenolic or Metal caliper piston? #2462766
03/07/18 08:25 PM
03/07/18 08:25 PM
Joined: May 2005
Posts: 3,585
Florida
BDW Offline OP
master
BDW  Offline OP
master

Joined: May 2005
Posts: 3,585
Florida
I see rebuilt brake calipers listed with Phenolic or metal pistons.
No real difference in price, so which is better?
Phenolic Is ceramic/plastic based, so no rust issues.
Metal might be stronger with less deflection?

Which would you choose?

Thx

Re: Phenolic or Metal caliper piston? [Re: BDW] #2462768
03/07/18 08:29 PM
03/07/18 08:29 PM
Joined: Apr 2003
Posts: 913
Cincinnati,Ohio
J
jcastle1 Offline
super stock
jcastle1  Offline
super stock
J

Joined: Apr 2003
Posts: 913
Cincinnati,Ohio
it does not matter, just make sure the pair are the same

Re: Phenolic or Metal caliper piston? [Re: BDW] #2462803
03/07/18 09:37 PM
03/07/18 09:37 PM
Joined: Feb 2003
Posts: 7,934
A
Andrewh Offline
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Andrewh  Offline
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Joined: Feb 2003
Posts: 7,934
there was an issue at one point for the phenolic ones so I always go metal.

they recalled them because it would cause the caliper to lock up and keep the brakes on till they cooled.
had it happen with an 84 new yorker. mbody car.

Re: Phenolic or Metal caliper piston? [Re: BDW] #2462863
03/07/18 11:05 PM
03/07/18 11:05 PM
Joined: Jan 2003
Posts: 19,645
Niles , Ohio
T
therocks Offline
Its Lost
therocks  Offline
Its Lost
T

Joined: Jan 2003
Posts: 19,645
Niles , Ohio
I agree had problems with Phonelics sometimes.I use metal.Rocky


Chrysler Firepower
Re: Phenolic or Metal caliper piston? [Re: BDW] #2463141
03/08/18 03:58 PM
03/08/18 03:58 PM
Joined: Dec 2003
Posts: 17,591
Trumussia
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jcc Offline
No politics
jcc  Offline
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Joined: Dec 2003
Posts: 17,591
Trumussia
"Phenolic Is ceramic/plastic based, so no rust issues."

Are we talking 70's stuff, never heard the ceramic description before.
Not sure rust is that much of a problem anyway if using a CI caliper.

I suspect phenolic was a cheaper solution, I would chose alum between the two. twocents


On vacation until 2-15-19 Figuratively
Re: Phenolic or Metal caliper piston? [Re: jcc] #2463163
03/08/18 04:46 PM
03/08/18 04:46 PM
Joined: Jan 2003
Posts: 16,342
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dogdays Offline
I Live Here
dogdays  Offline
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Posts: 16,342
Phenolic....."a usually thermosetting resin or plastic made by condensation of a phenol with an aldehyde and used especially for molding and insulating and in coatings and adhesives — called also phenolic resin."

There are no ceramics in phenolic.

On the first Ford Tauruses, the standard cars got phenolic caliper pistons, the cop and taxi and SHO models got metal pistons. So in that case metal pistons were more high performance.

Regarding thermal linear expansion, phenolic is 6 times the expansion of steel, 4 times the expansion of stainless steel, and 3 times the expansion of aluminum. Numbers were rounded.

So phenolic expands more per degree increase than three common metals.

Go with the metal pistons.

R.

Re: Phenolic or Metal caliper piston? [Re: dogdays] #2463238
03/08/18 06:41 PM
03/08/18 06:41 PM
Joined: Nov 2009
Posts: 268
western new york
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horsepower.2007 Offline
enthusiast
horsepower.2007  Offline
enthusiast
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Joined: Nov 2009
Posts: 268
western new york
I had phenolic calipers on my lil red, They stuck all the time.


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