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Old 09-14-2002, 12:23 PM   #1
subaruracerx
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Default perrin wilwood vs. subaru 4-pot?

I haven't seen this comparison. Are they about the same?

I'm not racing the car so the fact that one is made of aluminum and the other out of cast iron or whatever isn't a concern to me. Just want to know a general daily driving comparison.
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Old 09-14-2002, 12:29 PM   #2
subysouth
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Talking Try these threads:

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Old 09-14-2002, 07:52 PM   #3
Gargantua
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Default Four pots

Those are some very informative threads.

I bought the Subaru four pots from Puyallup Subaru through their website for 600.00 which included the shipping costs and of course the pads as well. There have also been some group buys for them as well

Last edited by Gargantua; 09-15-2002 at 01:49 PM.
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Old 09-16-2002, 12:49 AM   #4
Concillian
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My reasons for going with the Subaru 4 pots:

1) There's no way the Wilwood caliper is stiffer than the Subaru 4 pot caliper

2) Similar piston area to stock and similar brake torque to stock will probably lead to more consistent ABS activation (assumption, not based on fact)

3) I liked the street pads available for the Subaru 4 pots better than the street pads available for the Dynalite.

4) Wilwood makes a brake upgrade for Subarus already. They decided not to use the Dynalite in the front right? Hmm....

5) I already had rims to fit over the 4 pots (16x7 '00 RS wheels and 17x7.5 Sub Zeros)

If #5 isn't there, some people may have problems with a setup that won't fit under stock rims.
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Old 09-16-2002, 01:35 AM   #5
Patrick Olsen
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Quote:
Originally posted by Concillian
My reasons for going with the Subaru 4 pots:

1) There's no way the Wilwood caliper is stiffer than the Subaru 4 pot caliper
Based on what data? Billet aluminum Wilwood vs. cast iron STi, my bet's on the billet aluminum piece.

Quote:
Originally posted by Concillian
3) I liked the street pads available for the Subaru 4 pots better than the street pads available for the Dynalite.
I haven't looked into this myself, but considering the wide-ranging usage of the Wilwood calipers I'm pretty sure you can find just about any pad you want for them. What were you looking for that you weren't able to find?

Quote:
Originally posted by Concillian
4) Wilwood makes a brake upgrade for Subarus already. They decided not to use the Dynalite in the front right? Hmm....
There's a big distinction between the kit that Wilwood markets and the one marketed by Perrin. Wilwood's kit is a whole hog, all out track setup - 6 piston front, 4 piston rear, with big rotors. The Perrin kit that uses the Dynalite is intended for street/light track use. I'm sure if Wilwood was looking to market a street-type setup, they would have used one of their smaller, lighter, less costly calipers.

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Old 09-16-2002, 11:36 AM   #6
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Quote:
Originally posted by Patrick Olsen

Based on what data? Billet aluminum Wilwood vs. cast iron STi, my bet's on the billet aluminum piece.
Based on the material used (cast iron stiffer than aluminum), amount of it, and the design. The dynalite is somewhat known for being a little flexy on larger cars as well. Call up Precision Brakes Company and get their opinion of the Dynalite. They MAKE a bracket for the Dynalite for the Subaru (it's what Nino sells in his packages in the Vendor section) and they were trying to steer me away from it when they heard I would potentially be using it for track duty.

I have a hard time understanding why you think a race caliper with weight considerations made out of a material with a lower modulus of elasticity is going to be stiffer than an OEM application caliper made out of a material with a higher modulus of elasticity. It's no secret that the Subaru 4 pots weigh a ton. They are a beefy caliper. The Dynalite is designed to tradeoff some flex for weight savings. Wilwood has several other heavier 4 pot calipers in their product line, but none smaller. It wouldn't surprise me if most were more rigid than the Dynalite.

That is my line of thinking.

Quote:
I haven't looked into this myself, but considering the wide-ranging usage of the Wilwood calipers I'm pretty sure you can find just about any pad you want for them. What were you looking for that you weren't able to find?
I was talking specifically axxis pads, which I like for the street. Definitely personal preference there, though influenced somewhat by the fact that I know DBA makes sure their rotors are very compatible with the popular Axxis compounds. (And I already had DBA rotors)

Quote:
There's a big distinction between the kit that Wilwood markets and the one marketed by Perrin. Wilwood's kit is a whole hog, all out track setup - 6 piston front, 4 piston rear, with big rotors. The Perrin kit that uses the Dynalite is intended for street/light track use. I'm sure if Wilwood was looking to market a street-type setup, they would have used one of their smaller, lighter, less costly calipers.
Perhaps true. Something to think about none the less.

Last edited by Concillian; 09-16-2002 at 12:47 PM.
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Old 09-16-2002, 12:36 PM   #7
Concillian
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One other thing I took into consideration is the pad thickness.

The Dynalites are thinner than the 4 pot pads. The stock pads I used for a few thousand miles are still almost 0.1 inch thicker than Dynalite pads are when they're new.

New Dynalite pads are 0.49 thick (including backing plate, according to the Wilwood site) my OEM 4 pot stock pads with a few thousand miles on them are all over 0.56.

I guess that's the price to pay for a 4 pot that fits under the stock wheels. Not a huge deal, but something for consideration.

Last edited by Concillian; 09-16-2002 at 12:44 PM.
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