Twin Stock Calipers???

[SupraZed]

my mate ferrari 360 modena has two brake calipers on the back for some reason ??

d-king

The second caliper is for the handbrake

[yogibear]

Ive seen simple ducting on world rally cars that simply ducts air streight on to the disc , surely that will make a difference. Ive got two 3" holes in the front of my bumper that I was planning on running ducting from much like cold air ducting for the air filter. Im gonna try and find some pics of what I mean.

As far as technique goes I could probably benifit form some tutoring

this is what i mean, think this is on an mx5

[MikeLMR]

I\'m sure it will help (not sure what effect cooling one side more than the other will have? ... probably too detailed to be worrying about for anything other than an OEM application or top level racing i.e WRC or F1

Notice as well that the mx5 has had the dust covers removed.

[Mazdarotaryparts]

I\'ve never heard of a disc exploding and killing anyone (1st gen ones are prone to cracking under very hard racing conditions). As long as they\'re within manufacturers tollerance skimming them this isn\'t a problem.

QUOTE]

Sorry but I have know of a guy in a beemer that went into a lamp post after a disc exploded and whilst he walked away he sued the pants off the company that skimmed them for his written off car!

If you look at the FD disc you will see that there is a light weight disc with very little meat on them compared to many and so sorry but skimming a worn warped FD disc is crazy in my opinion and I would be very surprised if you would ever skim out a bad warp in any disc within any manufacturers tolerances

I am all for saving money but the also club cant have the situation happening where potentially someone reads something here then goes and has an accident and then blames the club, hence my warning "disclaimer"

[mullins]

I agree if it\'s warped i wouldn\'t skim it, but that\'s not what you disclaimer said - it advised against ANY skimming.

[clive]

I agree if it\'s warped i wouldn\'t skim it, but that\'s not what you disclaimer said - it advised against ANY skimming.

Yep stand by that as my warning post above is the easiest way of detering people from potentialy ending up with a dangerious part and protecting MRC !

Very sorry you don\'t like this statment but it is best for the Club

[Dan Norton]

Dont skim you\'re discs what ever you do.

[shaunwil]

Out of interest why not ?? All we are talking is a few thou a side ??

Shaun

[shaunwil]

Sorry just read the above information...................................

Just seems very odd, ok serious runout would wreck the disc and skimming would ruin the structural integrity of the disc, but then it would be out of tolerance and un-usable anyway. I think there is only about 1mm of wear in a brake disc anyway for these cars.

Sorry if I\'ve mis-informed anyone. I\'m a time served CNC turner and wouldn\'t think anything of it if the runout was minimal, thats all they do when they manufacture the disc.

That would be my own choice and obviously not the clubs and the decision would be only on my own equipment.

Shaun

[yogibear]

Guess I wont get the discs skimmed then . Wasent gonna anyway think it was just someones suggeston.

Right next question then is where would I get a couple of caliper rebuild kits and is it a specialist job to rebuild them or would it be something I could do myself?

[mullins]

Rebuilding the calipers carries all the same risks as skimming discs.

[chrno]

Im sorry for putting my nose in the discussion, but I have to ask you:
What setup where you running when you had the warping, and how worn where they.  I know alot of people, as some has said here. You could get a very nice brake setup with new discs, new pads, new fluid and maybe add braided lines. To start everything up with adding a set of calipers to a setup that is already good sounds "dumb" imho.

A friend of mine went along for a ride in my car with standard brakesetup, not on the track though. And he was amazed at the stoppingpower.

Best regards, Daniel

[TonyC]

Often a warped disk isn\'t warped at all. What has happened is that some of the pad material has been welded to the disk face. This often happens if you get the brakes very hot and then leave the brakes on when stationry - IE: sitting on the pedal whilst queueing back into the pits, or putting the handbrake on. Even coming to dead stop if the brakes are very hot and leaving your foot on the pedal.

[mullins]

It pays to leave the handbrake off, and every couple of minutes push the car half a wheel turn or so to allow the brakes to cool evenly after a race.

[MikeLMR]

or just back off for the last couple of laps and let the car cool down on the move. Sitting with the brakes on also provides a really good path for conducting heat from the hot brakes into the caliper and hence heating the fluid.