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Performance Difference between 4 piston Wilwood & C5 conversion?

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Old 01-22-2006, 08:54 PM
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nonetooclose
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Default Performance Difference between 4 piston Wilwood & C5 conversion?

Which is the better way to go? I was thinking about the VB&P C5 conversion kit...

http://www.vbandp.com/detail.aspx?ID=291

I will not be doing much auto cross, but I want the best brakes I can reasonably get.

Richard
Old 01-22-2006, 09:15 PM
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If you have the money, go to Wilwood.
Old 01-23-2006, 02:28 AM
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What is your budget? The stock 84-87 brakes work quite well.

I'd recommend trying the DRM bias spring with hawk hps or hp+ pads, and get the rotors cut, and a good fluid flush. If you can manage to fade those, then get the C5 kit and bias spring. Don't buy it from those guys though, they're overpriced.

Last edited by CentralCoaster; 01-23-2006 at 02:31 AM.
Old 01-23-2006, 06:31 AM
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Go MOVIT or Brembo. Wilwood requires Cutting.

www.movitusa.com
www.brembo.com


Here is the 4 piston setup. Around $2200 to $2300.00 from MOVIT



Pic of the 6 piston billet setup.

Last edited by Bluewasp; 01-23-2006 at 07:25 AM.
Old 01-23-2006, 10:30 AM
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He has an 85. You can install C5 wilwood bolt-on front kit to your 85 without cutting. It requires either a C5 upgrade adapter or a custom caliper bracket. Ed's bracket won't work though. Check my corvette photos.
Old 01-23-2006, 10:31 AM
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CentralCoaster
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Nuts! I assume the huge movit calipers are for a heat sink for the brake fluid?

How much does one of those kits go for, for a 84-87?
Old 01-23-2006, 12:00 PM
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The larger 6 piston billet setup costs ~$3200

The 4 piston monoblock setup is a little more then $2k....

He also sells a 4 piston rear caliper with a small parking brake caliper.

NO cutting required....




Last edited by Bluewasp; 01-23-2006 at 12:03 PM.
Old 01-23-2006, 12:05 PM
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Originally Posted by CentralCoaster
He has an 85. You can install C5 wilwood bolt-on front kit to your 85 without cutting. It requires either a C5 upgrade adapter or a custom caliper bracket. Ed's bracket won't work though. Check my corvette photos.
but it's not something Wilwood sells. He has to go out and buy another adapter... Which adds to the cost. ?????
Old 01-23-2006, 12:17 PM
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I can get the VB&P C5 kit for approx $800 which I would think is a pretty good deal for the larger surface area of braking and also do a DRM bias spring, new hoses, and better fluid. I would think this would be at least close to the wilwood kit.

If I went with the wilwood kit from precision brakes has anyone tried out that kit? Adapter included? Where would I get it otherwise?

I would like to stay under $1.2K

Richard

Last edited by nonetooclose; 01-23-2006 at 12:28 PM.
Old 01-23-2006, 12:30 PM
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Originally Posted by CentralCoaster
He has an 85. You can install C5 wilwood bolt-on front kit to your 85 without cutting. It requires either a C5 upgrade adapter or a custom caliper bracket. Ed's bracket won't work though. Check my corvette photos.
Centralcoaster,

I took a look at your photos! Wow! Nice setup... I should be able to fit that in my wheels since I have 2002 Z06 rims. Did you have to buy an adapter braket? Where? Also where did you get the wilwood kit from?

Richard
Old 01-23-2006, 03:21 PM
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The C5 rotor, which are as big as the ones on my friends GT1 car, are actually cheaper than C4 rotors

So if you can get a kit that uses those.
Old 01-23-2006, 04:37 PM
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Originally Posted by BrianCunningham
The C5 rotor, which are as big as the ones on my friends GT1 car, are actually cheaper than C4 rotors

So if you can get a kit that uses those.
Brian, Maybe you can explain to me why someone would want a kit that uses stock C5 rotors. I've read several threads, in the road racing section, were people have said that the rotors crack after a session or last one weekend at most. You're spending around $70 dollars a weekend for rotors plus the time it takes to swap them out. If you went with a higher quality, and larger rotor you wouldn't need to swap them out as often. Plus the benefits of larger / thicker rotor, etc..

While living in Germany I visited the hockenheimring several times and drove on the autobahn almost on a daily basis. I never swapped rotors, no issues with cracking (drilled / slotted) or brake fade.

Of course everyone doesn’t replace rotors after every weekend event but I seriously doubt I could have driven the autobahn and the Ring for two years on one set of C5 rotors… I was able to on a set of Brembos

If you going to spend $1500 or more on a big brake package why use Stock C5 rotors?

Thanks
Robert

Last edited by Bluewasp; 01-23-2006 at 04:41 PM.
Old 01-23-2006, 05:00 PM
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Brian, Maybe you can explain to me why someone would want a kit that uses stock C5 rotors.
A friend of mine is going to adapt Brembo rotors which will fit the C5 Calipers. These rotors are used on the Porsche 993 TT / C4S.


That's cheaper than Movit and better than any stock C5 rotor. I'll try this as soon as available ...
e.
Old 01-23-2006, 05:10 PM
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If want to keep the stock wheels, you can't go to a 14in rotor.

C5 rotors aren't the best, but they're better than the C4's, and they're cheaper to boot. Aggresive pads make the rotors as disposable as the pads.

Me, since I have 18in wheels and the J55's already, I'm not upgrading till I can get 14in rotors.
Old 01-23-2006, 05:15 PM
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Originally Posted by Eike
A friend of mine is going to adapt Brembo rotors which will fit the C5 Calipers. These rotors are used on the Porsche 993 TT / C4S.


That's cheaper than Movit and better than any stock C5 rotor. I'll try this as soon as available ...
e.
Whats the cost? MOVITs are around $300 each. Brembos are 250, best price i've found. Porsche and brembo go hand in hand. ARe you saying the rotor and hat your friend is going to sell will be cheaper then what you can find on the market currently?

The wilwood kit that works with C5 rotors costs ?? $1500? Then you add a brembo rotor, 250 each. NOw you need the hat?? Cost 250 each to 300 each? So you are talking about a system that now costs over $2k???

Stillen used to sell Brembo C4 hats for F40 calipers, $300.00 each.

Last edited by Bluewasp; 01-23-2006 at 05:54 PM.
Old 01-23-2006, 05:16 PM
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Originally Posted by BrianCunningham
If want to keep the stock wheels, you can't go to a 14in rotor.

C5 rotors aren't the best, but they're better than the C4's, and they're cheaper to boot. Aggresive pads make the rotors as disposable as the pads.

Me, since I have 18in wheels and the J55's already, I'm not upgrading till I can get 14in rotors.
Brembo sells 13inch rotors. I own two sets. That isn't a good reason to buy a kit that uses stock C5 rotors. Why spend all that money and go cheap on rotors? Doesn't make sense to me



I own a brembo C4 kit and a MOVIT kit btw.

Last edited by Bluewasp; 01-23-2006 at 05:51 PM.
Old 01-23-2006, 06:13 PM
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Whats the cost?
I bought C5 calipers from a forum member for a nice price. I'll reuse my brake lines - they are as good as new and ss.

In Germany, the rotors cost $250 each and the hat will cost $120 each and can be reused. Assembled and balanced, the kit will cost $780

It will only be a small series production, perhaps a hand full. But anyone who has the CAD-drawing can make the hats ...

Last edited by Eike; 01-23-2006 at 06:16 PM.

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Old 01-23-2006, 07:38 PM
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A lot of companies make aftermarket rotors for the C5, which is yet another reason to utilize a kit the uses them. It's a cost thing.

If I had $$$ to burn I'd run StopTech's or Alcons, the Wilwoods are a good compromise, and most speed shops carry their rotors.
Old 01-23-2006, 08:20 PM
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My wilwood kit, from summit is $1900. Add in brake adapters for $100-$200. Electrodynamics sells some that'd work with at most very very minor touch up with the grinder, but he's expensive.

Then you need brake lines for $50 (using earl's fittings). The calipers are excellent, 6 SS pistons, billet, but do not have dust boots. Quick change pads, same as all the other expensive kits. There was a forum member on here selling a Camaro 12.9" wilwood kit with custom brackets for the C4.

The kit I have will upset your bias so much that you'll need a super stiff bias spring (about $5) or pressure reducers on both front lines. The drm spring isn't strong enough for anything more than a C5 upgrade in my opinion.

Replacement wilwood pads are cheap and readily available, but the rotors are $220-240 each.


I'm almost tempted to go back to the stock 85 brakes with better pads just so I can show all the naysayers what they're capable of. I couldnt turn down the deal on the wilwoods though.
Old 01-23-2006, 08:23 PM
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Originally Posted by BrianCunningham
A lot of companies make aftermarket rotors for the C5, which is yet another reason to utilize a kit the uses them. It's a cost thing.

If I had $$$ to burn I'd run StopTech's or Alcons, the Wilwoods are a good compromise, and most speed shops carry their rotors.
Brian, do you think the C5 rotors would work with the superlite wilwood kit?

This kit uses 13.1x1.25" rotors, but I don't know if the offset matches up with the C5 units... the wilwood hats are very shallow, they only come off the rotor face by about 5/8"


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