Front calipers??
Hotshot
Joined: May 2005
Posts: 13,484
Likes: 42
From: Stevens Point, WI
Plastic doesn't rust and eventually isn't supposed to "freeze" or hang up. However the caliper body is still cast and rusts eventually causing it to "freeze" or hang up. lol
Phenolic also doesn't allow heat transfer from the pad to the caliper to the fluid keeping it from boiling.
Phenolic also doesn't allow heat transfer from the pad to the caliper to the fluid keeping it from boiling.
Hotshot
Joined: May 2005
Posts: 13,484
Likes: 42
From: Stevens Point, WI
Kind of, it is a really hard sort of plastic, it acts more like fiberglass if you scrape at it or break it without the actual fibers in it.
They have been using phenolic for years as heat bariers for carburetors and intake manifolds and the like.
Phenolic is better. But to me it would depend on price, I would rather have the phenolic if the price allows it. But if they want $100 more for a pair of calipers over the steel ones I would probably get the steel ones.
They have been using phenolic for years as heat bariers for carburetors and intake manifolds and the like.
Phenolic is better. But to me it would depend on price, I would rather have the phenolic if the price allows it. But if they want $100 more for a pair of calipers over the steel ones I would probably get the steel ones.
Post Fiend
Joined: Mar 2009
Posts: 11,798
Likes: 14
From: Mt. Shasta California
Kind of, it is a really hard sort of plastic, it acts more like fiberglass if you scrape at it or break it without the actual fibers in it.
They have been using phenolic for years as heat bariers for carburetors and intake manifolds and the like.
Phenolic is better. But to me it would depend on price, I would rather have the phenolic if the price allows it. But if they want $100 more for a pair of calipers over the steel ones I would probably get the steel ones.
They have been using phenolic for years as heat bariers for carburetors and intake manifolds and the like.
Phenolic is better. But to me it would depend on price, I would rather have the phenolic if the price allows it. But if they want $100 more for a pair of calipers over the steel ones I would probably get the steel ones.
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Elder User
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From: Hattiesburg, MS
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Cargo Master
Joined: Mar 2005
Posts: 2,790
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From: Mount Royal, NJ
The benefits to phenolic pistons over steel are primarily less heat transfer to the seal, almost zero warping and expansion under heat, and no rust from water infiltration into the brake fluid.
In every way that I can think of, Phenolic resin makes a better piston for brake calipers.
In every way that I can think of, Phenolic resin makes a better piston for brake calipers.
Hotshot
Joined: May 2005
Posts: 13,484
Likes: 42
From: Stevens Point, WI
The benefits to phenolic pistons over steel are primarily less heat transfer to the seal, almost zero warping and expansion under heat, and no rust from water infiltration into the brake fluid.
In every way that I can think of, Phenolic resin makes a better piston for brake calipers.
In every way that I can think of, Phenolic resin makes a better piston for brake calipers.
They scratch easier, can crack, and get roughed up by the bore and seal over time causing them to stick and/or leak.
. They r the same price. Same core and all.
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Elder User
Joined: Dec 2006
Posts: 674
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From: Hattiesburg, MS
Tks. That is what I was thinking also. Gonna knock it out in 2 weeks.