If you change your mind please let me know. I, like a lot of people, am building an LS1 miata that is a good deal heavier then stock with all the "old man" features being added or retained. The car will be a bit heavier then the typical miata so it'll need all the braking force it can get.

I'm not trying to have a pissing contest here, but if stock rears worked on Savington's car in particular, plus a few other severely beaten turbo track cars, it should be fine for anyone.

Shoot us an email if you ever need a rebuild kit. We can get them. sales@trackspeedengineering.com

I like to have spared in case I break the car on the track.

700-800 pounds of difference between his car and the typical "old man LS1 miata" means we need more braking force then he does. Plus, as Emilio said to me in the past, in order for the Germans to get a good braking car without squeel, they had to run a larger less aggressive pad. Minus Wheel Bolts, the Germans know what they are doing :)

I cannot wait to get the front setup in behind the nickel 15x9 6UL's Emilio has on the way :giggle:

Which is why I went with this setup over a normal Wilwood BBK....... The extra rotational mass was worth it in order to have a cheaper, more common rotor.

A larger rotor will provide more force, but so will a bias knob. If the bias knob can direct enough pressure to the rear brakes to lock them, a larger rotor will be of no benefit at all.

If you insist on a larger rear setup, M-Tuned makes a kit that will do it. Nick and I have discussed it a couple of times, hashed out a couple of options, but we always come back to the same conclusion: it simply isn't necessary.

Already have the Mtuned kit and a proportioning valve. Guess I'll have to see what the added weight does :)

For the Wilwoods, get a pair of bleeders as they will come out at some point. And piston O-rings for the winter overhaul.

Nice work Savington!

I just came across this thread, wished I had seen it sooner.

I've been taking measurements to basically to the same - adapt a set of Wilwood 4-piston calipers to either standard 1.8 rotors, sport rotors, or Corrado rotors. The caveat is that the rotors & calipers have to fit under my 15" Enkie RP-F1 wheels. I started looking into this for the exact reasons you've mentioned - the stock calipers produce way too much pad taper when pushed very hard. I've found that to be true even on my N/A car pushing ~125-130hp. Now that I'm pushing 170+, I'd expect it to be more of a problem. The big problem with the stock brakes is not the rotors, it is the calipers.

Couple of questions:
1. Have you test-fit an Enkie RP-F1? My guess is that it doesn't fit, but I'm wondering by how much.
2. Why Wilwood DynaLites? The DynaLite is an old model which is gradually being replaced by the DynaPro. The DynaPro is stiffer and an all-round better designed and featured caliper, thought it is 0.4 pounds heavier. My best guess is pad choice, since Carbotech is making pads for the DynaLites? DynaPro calipers only cost $15 more, and since they are the way of the future, I bet Carbotech will add it to their lineup.

Thanks,

Will

#'s aside...you're telling me that you need more rear brake torque and heatsink than savington or this car:
http://farm3.static.flickr.com/2664/...efcb5405_b.jpg?

I have not, but if I can get my hands on one I will try it and see.


DynaPro calipers are actually double the cost of DynaLite calipers - Summit sells the Lites for $124.95 and the Pros for $249.95. A DynaPro caliper would bolt up to our bracket, but it would add $250 to the cost of our kit ($850 current cost, $900 retail). A DynaPro 6-piston caliper would add $306 ($956 retail). The kit was designed with cost as one of the priorities, and the DynaLite fits that criteria the best.

Nice! Please let us know how it goes with the RP-F1.

About the DynaPro, they are available with in different piston sizes.

The 1.78" piston calipers are $250

The 1.38" piston calipers (#120-9703) are $148
Wilwood Disc Brakes 120-9703 - Wilwood Billet Dynapro Calipers - Overview - SummitRacing.com

I assume your kit used 1.38" pistons to retain stock-like piston area, so the cost would have been $148 each?

You're correct, yes. The DP4s are not nearly as expensive as I thought they were. Having said that, the Lite is still a better budget option.

I called Wilwood a couple of months back about the lite vs pro, and the answer I got wasn't super definitive - the DP is a better caliper, but not enough better that they'll stop making Dynalites any time soon. The pads are readily available, as both the FM and Goodwin BBKs use them.

The biggest advantage of the Dynapro is that you can get it in a radial mount design, which is much stiffer than the lug-mounts that most (all? not sure about the new V8R kits) current BBKs use. Our brackets can't take advantage of that, though, and the DP4 radial mount calipers in a 1.38" bore size for a .81" disc (making me check my work ;)) is ~$200 from Summit, pushing the cost of the kit higher than we wanted to see it.

At the end of the day, I'll take better pad availability and less unsprung weight over a slight increase in caliper stiffness, at least for our basic kit. Like I said earlier, if someone wants to substitute calipers, we can easily do that.

3 kits left at our $600 price. They are available now through our online store - you can order them there and get the $600 price.

Trackspeed Engineering

tested for clearance issues with Kosei K1s yet? (15x7 +38)

Oscar, as soon as I get my hands on one I will throw it on a car and let you know.

awesome, thanks

Can someone tell me if the Dynapro can be a direct replacement for the Dynalight in the Trackspeed kit?

Are Carbotech pads are available for it? What other pads?

They use the same rotors, right?

How much more do the Dynapros weigh?

Lug-mount Dynapros drop right in, both 4 and 6 piston. They do make CTs for it, not sure what else they do. I assume lots of stuff. Same rotors. Not sure in the difference in weight.