scientific explaination of Squeel in reverse(STi)

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Mar 25, 2004 | 02:19 AM

gdogg

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iTrader: (38)

Joined: Oct 2003

Posts: 7,783

From: rightBehindYou, HI

Car Info: 1973 Huevo Ranchero

scientific explaination of Squeel in reverse(STi)

sorry, i know its been kinda covered (post link if good enough)
i'm just a little lazy to "search"

situation recap-
sti- reversing and brakes go SQUEEL 2 SCREECH when pressed

the problem- it's embarrasing when people see an awesome looking car that screams when reversing- my car has 8k miles: i sold several of em and my friends one 1k miles does it already

the solution- i need a scientic explaination and "feasible" solution if there is any

thank you in advance for your helpful replies

Mar 31, 2004 | 09:43 AM

Rallysportz

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Posts: n/a

usually pads, mostly high performance pads, will have the leading edge shimmed (bottom edge of pad when rolling forward) off so it's not a squared edge. Having a squared edge sometimes causes that part of the pad to hit before any other part, causing the pad to "bounce" or chatter on the rotor. It is actually a vibration, bouncing really fast, and that chattering vibration causes a squeaking sound. If you want, you could pull your pads and see if they are in fact shimmed on one edge. If not, don't worry about it but then you could try filing down the top, trailing end, corner pad which is the leading edge when reversing. That should solve the problem, unless the pads are already shaped appropriately. Good luck, hope that helps a little.

-Andy

Apr 4, 2004 | 08:34 PM

Steppin Razor

@Stoptech

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Joined: Nov 2002

Posts: 2,416

From: San Francisco, CA

Car Info: 2002 WRX Wagon

Get StopTechs? Haha, just kidding.

Rallysportz idea of beveling the trailing edge of your pads is a good one. But before that, I would ask you what kind of bedding procedure you've done, if any?