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Old 12-23-2009, 09:59 PM   #1
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Default V8Roadsters BBK @ 949Racing

The guys at V8 Roadsters have just finished this 11.75" Race Big Brake kit. We will be offering the kits with these changes:
The kit is designed as an absolute no compromise race system. Spacers are required to clear the calipers on most wheels except 6UL's. The fronts with Dynalite 4's are designed to clear gen II 15x9 6UL's. The rears require a 2~3mm spacer to clear the 15x9 6UL. Gen I 15x9's clear the rear without spacers. As you can see, there is no provision for an emergency brake.

Replacement friction rings (rotors) are the same part for all four corners and are a measly $50 each! Ya gotta love that.

My rough measurements put the total weight savings at about 18.5 lbs over the 100% stock brake system including e-brake hardware.

For the average dual duty or track only car making less than 200~250whp, the 11"Goodwin V4 BBK we have been offering is probably the best choice. More power than that and trailered, the 11.75" V8R BBK starts to be the better choice I think. We're removing the old 11" BBK from the OGK and installing one of these.

The system includes:

4 - 11.75" x .810 Wilwood rotors, straight vane
4 - Ultra light weight alloy hats
2 - Wilwood Dynalite 4 piston calipers, 1.75" piston
2 - Wilwood Dynalite 4 piston calipers, 1.38" piston
2- Carbotech CTW7112 brake pads, your choice of compounds
4 - Aluminum, helicoiled caliper brackets. Hard anodized
1 - Wilwood tandem master cylinder
4 - Stainless brake lines, PnP
2 - Cunifer, hand formable hardlines for master conversion
2 - Motul RBF600 brake fluid .5 L

Options:
Dynapro 6 piston front caliper (huge!)
Red powder coated calipers
Any Carbotech pad compound including the 1521 street pad

Full details and pricing on the website

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Old 12-24-2009, 05:59 PM   #2
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It's amazing how the cheap the 11.75 friction rings are compared to the 11" ones more common on Miata kits. Another example of The Man sticking it to the little guys.
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Old 12-26-2009, 01:38 AM   #3
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It's amazing how the cheap the 11.75 friction rings are compared to the 11" ones more common on Miata kits. Another example of The Man sticking it to the little guys.
No, it's all about volume. The 11.75" rotor format is standard for most of the circle track racing in the US, so the volumes are high and the piece price comes way down. There's also tremendous choice on the price/content value spectrum.
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Old 12-26-2009, 02:15 PM   #4
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i didnt notice... but will this kit allow you to retain your cable handbrake?
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Old 12-26-2009, 06:10 PM   #5
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no it won't
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Old 12-26-2009, 06:46 PM   #6
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More importantly, does it come with caliper-cover heatsinks? I hear that's the stuff for fast cars...
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Old 12-26-2009, 10:23 PM   #7
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Silly me, when I saw it was from V8Roadsters, I thought it was a Big Block Kit...

What is "cunifer", exactly? Google says it's just a flexible hand-formable brake line, but there's got to be more to it than that? Wouldn't stainless lines be more than adequate for these cars?
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Old 12-27-2009, 03:29 AM   #8
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Silly me, when I saw it was from V8Roadsters, I thought it was a Big Block Kit...

What is "cunifer", exactly? Google says it's just a flexible hand-formable brake line, but there's got to be more to it than that? Wouldn't stainless lines be more than adequate for these cars?
Can't precisely bend standard SS lines by hand and they can still rust. The Cunifer stuff is awesome, can't kink it, bends to tiny radii and will never rust.
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Old 12-27-2009, 01:29 PM   #9
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Hey Emilio, is there any I can get just the FRONT portion of this package with 6-piston calipers? (Only need calipers, rotors, brackets and pads as I already have SS lines and the factory Sport rear brakes).
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Old 12-27-2009, 02:22 PM   #10
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Originally Posted by Doppelgänger View Post
Hey Emilio, is there any I can get just the FRONT portion of this package with 6-piston calipers? (Only need calipers, rotors, brackets and pads as I already have SS lines and the factory Sport rear brakes).
The front portion would have pistons sized for the 1" bore Wilwood MC. You would have a serious brake bias problem if you did that. We would have to special order the smallest bore DP6 but even then you should be looking at a 626 (7/8") or 929 MC (15/16"). If we used the rear DL4 with 1.38" piston (same as Goodwin front BBK), you would be close. Overall, I have found the the Goodwin BBK works best with a bigger diameter M/C.

Shandelle mentioned at one point that V8R had no plans on offer breakdown kits. I'll clarify it with them and if it changes, we'll add it to our website.

Last edited by emilio700; 12-27-2009 at 05:26 PM. Reason: spec corrections
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Old 12-28-2009, 08:37 AM   #11
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So are these 6 piston calipers different than the ones used for the other BBKs that GWR sells?

FWIW, I'm running a Brembo GT (read-massive 4 piston calipers) front brake kit right now and bias feels good.
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Old 12-28-2009, 12:49 PM   #12
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Originally Posted by Doppelgänger View Post
So are these 6 piston calipers different than the ones used for the other BBKs that GWR sells?

FWIW, I'm running a Brembo GT (read-massive 4 piston calipers) front brake kit right now and bias feels good.
Same Dynapro 6
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Old 12-28-2009, 02:41 PM   #13
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Originally Posted by emilio700 View Post
The front portion would have pistons sized for the 1" bore Wilwood MC. You would have a serious brake bias problem if you did that. We would have to special order the smallest bore DP6 but even then you should be looking at a 626 (7/8") or 929 MC (15/16"). If we used the rear DL4 with 1.38" piston (same as Goodwin front BBK), you would be close. Overall, I have found the the Goodwin BBK works best with a bigger diameter M/C.

Shandelle mentioned at one point that V8R had no plans on offer breakdown kits. I'll clarify it with them and if it changes, we'll add it to our website.
929 master cylinders were 7/8" up intil 1991, 1" there after. 15/16” is from a protégé Or a late model sport brake NB miata.
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Old 12-28-2009, 02:53 PM   #14
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Oh yeah, Emilio, my car has the sport brakes already...so I have the larger MC. Might that change the brake bias issues you speak of?
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Old 12-28-2009, 03:23 PM   #15
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929 master cylinders were 7/8" up intil 1991, 1" there after. 15/16” is from a protégé Or a late model sport brake NB miata.
I always get those mixed up. That's what I get for replying from home without my shop PC's database. There is also a 1-1/16 or 1-1/8" Mazda MC that can be adapted to the Miata, although that might be too big.

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Oh yeah, Emilio, my car has the sport brakes already...so I have the larger MC. Might that change the brake bias issues you speak of?
The 15/16 Sport Brake MC will work well. Shandelle tells me they're having trouble getting the DP6 into our Gen II 15x9. Bleed screws hitting rim.

We could do a front DL4 kit with out MC. Contact me directly for pricing and availability.
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Old 12-28-2009, 03:29 PM   #16
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Thank you Sir. Will do once I hock these Brembos.
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Old 12-28-2009, 03:29 PM   #17
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Originally Posted by emilio700 View Post
Same Dynapro 6
Interesting looking into this the DP6 will mount on the same bracket as a Dynalite. And comes with piston sizing pretty darn close to the standard 1.38” 4 pistons that Good-Win uses.

To go to a 6 pistion with my Radial mount Dynapro the billet narrow Superlight would bolt up but doesn’t come with as small of pistons as the DP6 normally. So brake bias will be an issue.

Honestly even turning low lap times in a super high hp Miata and abusing the brakes I have not seen the need for more brakes than I have with 11.75” directional vane .81” thick front rotors and Dyna-Pro 4 piston calipers. And defiantly vented rotors in the rear is overkill extra weight. A .38” thick solid rear rotor is significantly lighter and still doesn’t get as hot as the fronts. The difference in thermal capacity with the 11.75” directional vane over a Good-win kit is huge.

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Old 12-28-2009, 03:42 PM   #18
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Originally Posted by emilio700 View Post
I always get those mixed up. That's what I get for replying from home without my shop PC's database. There is also a 1-1/16 or 1-1/8" Mazda MC that can be adapted to the Miata, although that might be too big.


The 15/16 Sport Brake MC will work well. Shandelle tells me they're having trouble getting the DP6 into our Gen II 15x9. Bleed screws hitting rim.

We could do a front DL4 kit with out MC. Contact me directly for pricing and availability.
I’m considering going to a 1" MC myself. Would you think that would work well with Good-win sized caliper pistons like I’m running? I’m thinking I can be a bit more accurate and smooth with my downshifting with a stiffer pedal.

I put a 1” 929 on a 323 GTX that I have but it has the calipers I put on have bigger pistons all around and Still feels mushy compared to my Miata with the stock 7/8”

Bob
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Old 12-28-2009, 11:23 PM   #19
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I’m considering going to a 1" MC myself. Would you think that would work well with Good-win sized caliper pistons like I’m running? I’m thinking I can be a bit more accurate and smooth with my downshifting with a stiffer pedal.

I put a 1” 929 on a 323 GTX that I have but it has the calipers I put on have bigger pistons all around and Still feels mushy compared to my Miata with the stock 7/8”

Bob
A local guy here has a Goodwin V3 kit on a a fast N/A with ABS and a 1" 929 MC. Those are the best feeling Miata brakes I have ever driven buy a fair margin. So yes, +1 for the 929 MC. Tricky part is the hard lines are different on the different year Miatas so there is no one PnP MC. You have to make some hard lines. For those of use that have the right flaring tool that's easy. If not, you either want to DIY Cunifer lines or invest in a $300 flaring tool. The cheap flaring tools are worthless.

You want a bigger MC and smaller caliper pistons for reduced leverage/stiffer pedal. Bigger caliper pistons give you more leverage (power)/softer pedal.

Last edited by emilio700; 01-20-2010 at 04:03 AM. Reason: F7
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Old 12-28-2009, 11:39 PM   #20
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Emilio,
Any clue if the fronts will clear 6UL-1 in 15x8 +40?
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