Hammerhead
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| posted on 24/6/06 at 01:51 PM |
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Brake set ups on MK Indy
I think I might have a problem.............I bought some 300mm vented hi-spec disks and bells with the intention of fitting them to my Indy (in
construction). The rear set up is vented 4x4 cosworth disks.
Do you guys think that I will be over-braked? before I go and spend £300+ on hi-spec calipers for the fromt end.
If so what front brake set up are the 4x4 cosworth rear end guys using?
I need to resolve the brake situation before I carry on with the build.....please help.
Cheers. Steven.
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andyharding
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| posted on 24/6/06 at 02:19 PM |
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Way over braked.
I have standard Sierra vented discs on the front and 9" drums on the back. I have never had brake fade and it's not for lack of trying!
I've never even got the front brakes hot enough to smoke the grease off the calipers etc.
Are you a Mac user or a retard?
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nitram38
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| posted on 24/6/06 at 02:39 PM |
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You cannot over-brake just because a disc is vented!
Vented discs just dissipate heat faster than single discs. In other words you will be able to thrash the car around a bit longer as you will suffer
less brake fade.
How much balance you provide the rears with is more important.
If you can get a good bias set up, then keep your brakes bias towards the front.
All this means is the brakes will require less effort from you to operate.
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Hammerhead
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| posted on 24/6/06 at 02:45 PM |
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Thanks Nitram............ it was more the fact that the front disks are 300mm that I was worried about.
The master cylinder I have on the car at the moment is from a caterham. It only has one outlet for the front system. Is this going to cause me a
problem? or will the fact that the fronts are 300mm and the rears 273mm provide enough bias naturally? or am I talking poop!?
[Edited on 24/6/06 by Hammerhead]
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nitram38
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| posted on 24/6/06 at 02:59 PM |
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Balance maybe a problem if you are using a dual master cylinder because they are usually matched to the donor car, both with the caliper's
volume and the weight distribution of the car.
People on here have used a bias valve on the rear circuit or limiting valve to cut down the pressure to the rear calipers.
I prefer proper twin bias cylinders as these can be minutely adjusted according to your driving style (and sva rules).
I can't say wether your master cylinder is ok as I have not used one. (my car is rear engined aswell!!!)
Regards Martin (nitraM)
[Edited on 24/6/2006 by nitram38]
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andyharding
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| posted on 24/6/06 at 04:58 PM |
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Even with standard Ford pads my brakes don't work as well cold as hot. Performance pads need to run even hot to be most effective. Your car is
over braked if you can't get the brakes up to their optimal temperature.
Are you a Mac user or a retard?
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mookaloid
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| posted on 24/6/06 at 06:12 PM |
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You will most likely require a balancing valve to reduce the braking at the rear a bit
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nitram38
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| posted on 24/6/06 at 08:51 PM |
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You cannot over brake a car!
( you can use the wrong grade of pad which requires a high temperature to operate and therefore have ineffective brakes).
If you use a brake disc, with the corresponding size caliper and the correct grade of pad, then it will work.
You do not have to get a ferrari's brakes up to temperature before they work, just because they are bigger than a ford escorts!
My friend builds diablo replicas. They can use granada discs all around or massive discs that just fit inside 17" rims.
It stops a great deal quicker with the bigger discs and with less effort.
Anyhow, why would you need competition pads with bigger discs?
Competition pads were designed as a fairly cheap alternative to compensate for the heat gained if people could not afford to up-grade their
brakes.
Brake fade only occurs if you exceed the temperature rating of the brake pad. If you use bigger vented discs, you remove the heat quicker and
therefore improve braking.
[Edited on 24/6/2006 by nitram38]
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