Kriss
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| posted on 14/10/08 at 10:56 AM |
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Uprights and Brakes
Hi Chaps,
I have decoded that I want to get somethign a bit more capable upfront on my R1 Indy.
From a previous topic, it looks like I have standard 1.6 Sierra brakes. What I now want to know is, will any Sierra braking system bolt onto these
uprights?
My Clio V6 use to Run AP's and Vented disks with RBF600 fluid and REdstuffs for day time use.
The only option I can find currently is a Wilwood "donor" kit that uses solid disks???
So, any other options available? What do the track only boys use.
pics I have of the current set up.
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v8kid
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| posted on 14/10/08 at 11:07 AM |
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Plenty room there to fit bigger discs and keep the calipers. from memory if you fit cosworth 280mm discs the offset is such that you can extend the
caliper mounting with a lump of 10mm alloy plate - makes for a cheap job and upgrades your brakes by 20% or so.
Remember to upgrade rear brakes also. not too much though or the first time you brake hard you will swop ends
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MikeR
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| posted on 14/10/08 at 11:26 AM |
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Why do you want to upgrade your brakes?
have you had problems with brake fade?
Do you want them to look better and fill the wheels?
Do you want to reduce unsprung weight?
I'm asking as each answer has a different solution (potentially).
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adithorp
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| posted on 14/10/08 at 11:48 AM |
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With the weight of your car you don't need/want vented discs. They'll just add weight. You won't get the heat into the pads.
If you want to upgrade do it to save weight or for the "bling factor" and the Wilwoods fit the bill nicely.
adrian
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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Kriss
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| posted on 14/10/08 at 12:22 PM |
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my pedal lost a lot of feel on my last track day nearer to the end of the sessions.
mentally, I have little faith in them, the rears look so much bigger and running 15's means that my unsprung weight is higher than what is
achievble.
My argument to my friend about vented disks was wont they "loose" any built up heat quicker and then that actually work as a loss?
I want a bit more upfront bite, rather than require a huge stab on the brakes everytime. i hate to say it, but i do not trust them as much as i trust
say the R88 tyres, the power delivery or balance of the car
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britishtrident
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| posted on 14/10/08 at 12:54 PM |
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It might be an idea to check what temperature your brakes are reaching.
As too fancy fluids --- not really a good idea just use a standard DOT 5.1 fluid but change it regularly.
Higher boiling point racing brake fluids are more hydroscopic --- if you want to keep the boiling point higher than fresh everyday tintop Dot 5.1
fluid it will have to be changed regualrly how often depends on the conditions but with racing fluids probably at least twice a season.
This applies to a lesser degree to all conventional brake fluids --- the higher the nominal boiling point the more hydroscopic is.
Normal DOT5.1 fluid after 9 months will have a lower boiling point than fresh DOT4 fluid.
Your car should have a reward weight bias the front brakes will supply at most 60% of the stopping force unlike your Clio where the fronts have to
dissipate about 95% of the stopping energy of a much heavier car.
Also remember RWD driving technique is different from FWD ie with fWD the brakes are trailed into the corners.
The existing brakes should be adequate, though a lot will depend on the quality and characteristics of the pad material -- this is why it is
important to know what brake temperatures your are reaching.
If you want more bight from the brakes change the size of the master cylinder --- smaller master cylinder = less pedal pressure.
[Edited on 14/10/08 by britishtrident]
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stuart_g
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| posted on 14/10/08 at 12:59 PM |
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I would go for a change of pad. I think the Mintex 1144 is the popular choice if you are not already using these.
Definately no need to go for vented discs.
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blueskate
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| posted on 14/10/08 at 01:04 PM |
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Hi Kriss,
I'm having these fitted on the front of my indy :
lookwilwood kit
This kit uses vented discs but you need to buy pads.
Semper Paratus!
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britishtrident
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| posted on 14/10/08 at 06:24 PM |
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quote:
Originally posted by stuart_g
I would go for a change of pad. I think the Mintex 1144 is the popular choice if you are not already using these.
Definately no need to go for vented discs.
Good advice
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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