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  #21  
Unread 1st July 2012, 07:34 AM
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Rally Rally is offline
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No. They miss by a few mm- close, but not too close with 215 tyres.
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  #22  
Unread 8th July 2012, 02:02 AM
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Cheers, I just picked up a set of 4 black ones from eBay for 150.

The poverty pack is looking good too mate!
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  #23  
Unread 11th February 2013, 04:11 AM
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Rally Rally is offline
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Not for the Forrie, but the Impreza. Now for some serious stopping power. 8 piston front callipers on bigger and beefier 2 piece discs.





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  #24  
Unread 11th February 2013, 04:20 AM
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Join Date: Jan 2012
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Look good, Rally.

Do they work ...
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  #25  
Unread 11th February 2013, 04:31 AM
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Rally Rally is offline
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It was a bit of a drama. With the diffs the car has, you cannot free spin the front wheels like you can on most Subaru's- unless you jack the whole car up. So having installed the brakes and bled them, I went for a test drive. There was a horrible scraping noise. I realised that it had to be the disc rubbing something as it was happening with or without the brakes applied. Ripped off the callipers and the disc and saw scoring marks on the disc. I noticed that the bracket bolts were marked, meaning that they were too long. So I whipped out the angle grinder and ground them off. Put it all back together, but the noise was still there. ??? And now the ABS light was on. So I took the brakes off again and notice the heat shield was also marked. I had a suspicion that the metal filings from grinding away the bolts had being attracted to the ABS sensor. Sure enough, it was covered in metal filings so I quickly removed them- and the heat shield- on both sides. I re-installed the ABS sensors but not the heat shields, re-assembled the brakes and the noise was gone and so was the ABS light. Pads are not bedded in yet.
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  #26  
Unread 11th February 2013, 04:48 AM
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mr turbo mr turbo is offline
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Now thats what I call stopping power

Very nice Rally

Regards
Mr Turbo
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  #27  
Unread 11th February 2013, 04:52 AM
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Oh dear!! Doesn't that sort of thing give you the *****!

Don't you need the heat shields to protect the flexible brake hoses?

Do they have any effect on air flow over the discs?
After all, a brake works by converting the kinetic energy of the car into heat, which the brakes have to radiate away. Brake fade being caused by the disc (or drum) not being able to dissipate the heat in it, so the braking effect vanishes. Had a very bad experience coming down from the Lamington Plateau in a disc braked HR Holden on one memorable occasion some 40+ years ago ... Half way down the very long hill, the brakes faded to nothing. A two speed slushbox wasn't much help, either ...
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  #28  
Unread 11th February 2013, 05:10 AM
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No, the brake shields are one of the first thing track guys remove from the car. They do help protect the rubber in the tie rod end, so some protection is required there. Heat shields reduce cooling to that side of the disc. The brake lines aren't affected- besides, the fluid they have in them is subject to the heat from the pistons and pads, and that is a much better conductor of heat than air. I 'm pretty sure the protection of the tie rod boot can be solved. HR Holden discs are about half the size, with 1/8 the number of pistons and pads of much older technology. And the HR only had 2 discs.
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  #29  
Unread 11th February 2013, 05:25 AM
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Mate, the HR brakes were completely flaming tragic!

The body also had the torsional rigidity of a piece of wet spaghetti, slightly more than that of the Valiant of the times at between 6,000 and 7,000 ft.lbs. per degree torque to bend it one degree out of alignment. At least the HR would twist and then resume its correct shape. The V8 Valiants could twist if accelerated very hard out of a corner, and could not be straightened properly, even using a Mayrack ... By comparison, an Austin 1800/Kimberley took 15,800 ft.lbs. per degree ... Just a tad stronger, and more rigid ...

My Morris 1100 would stop from 60 mph in around 132 feet; and in a straight line ... The HR was around the 175-185 feet mark (IIRC). Bloody hopeless!

Glad your new brakes will be so good - just pulling your leg before . I am sure you will work out a way of protecting what needs to be protected. Bigger, better designed brakes should also generate less heat for the same performance.
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  #30  
Unread 11th February 2013, 05:35 AM
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Rally Rally is offline
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Join Date: Jul 2008
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Well, at least the HR was better off than the HD! 4 little coconut shells with a thin line of asbestos waiting to do very little. DId you see the photo Wheels did of a Holden back then of it's emergency braking? The axle tramp was so severe you could see quite clearly when the wheel was in the air and when it was locked leaving the intermittent skid mark. The caption read, "Cut across the dotted line"!
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