[DeTomaso] Stock brake calibers & other musings

Freddy Henningsen fredhen at online.no
Wed May 15 18:03:20 EDT 2013


Does anyone have the correct part numbers for Porterfield brake pads to the 
original modified calipers? and where you buy them?

Freddy
7207


----- Original Message ----- 
From: <eb0711 at kolumbus.fi>
To: <detomaso at poca.com>
Sent: Tuesday, May 14, 2013 9:36 AM
Subject: Re: [DeTomaso] Stock brake calibers & other musings


> Have been driving around with the rebuilt stock brakes with Porterfield
> pads. I appreciate this may not be greatest news, but I've got to admit
> I'm surprised how well it brakes. Not sure how good thin, stock style,
> rotors are for track use, but I really like what I got with small
> investment and elbow grease.
>
> -Janne
>
> 4/30/2013 1:12 PM, eb0711 at kolumbus.fi kirjoitti:
>> I rebuilt my stock front brake calibers recently and took them fully
>> apart while on that. I'm sure many know, but thought I'd share for the
>> benefit of other newbies:
>>
>> - Calibers seem like a decently nice design with big and little pistons,
>> with some oddities in fluid distribution by strange tubing arrangement.
>> - Outer pistons are individually at a dead end, meaning the fluid will
>> not change there, when you bleed them just for changing the fluid. Would
>> really need to squeeze the outer pistons to the bottom to get most of
>> the old fluid out from there.
>> - Changing rotors it's important to have the rotor and hub mounting
>> surfaces very clean and make sure the rotor is perfectly seated against
>> the hub. Otherwise the rotor will wobble and grab the pads at some point
>> of rotation. Easy to be sloppy here. :)
>> - Only way to use thicker ventilated rotors with stock calibers would be
>> to build a spacer to fit between caliber halves and use longer bolts. I
>> wonder if someone already makes them?
>> - Noticed also that the Porterfield pads have 1mm thicker (~20%) steel
>> backing plates than stock pads. So it's not just the compound, but
>> stiffness and (maybe?) heat handling improvement.
>>
>> -Janne
>>
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