4 Piston DynaPro caliper upgrade for almost ALL Big Brake Kits
 

These days most of us have put hundreds or thousands of hard track miles through our big brake kits. Time to rebuild the calipers? Take the opportunity to update your kit to the newer, much stronger DynaPro 4-piston caliper.

The old Dynalite caliper has been the workhorse of many Miata big brake kits for decades. It does the job but it flexes under heavy use and high heat, which you notice in pedal feel and often results in "tapering" of the pad as it wears. The DynaPro caliper is designed as a drop-in replacement for the Dynalite, but is much more rigid. The DynaPro features a "Quick-E-Clip" (much nicer than cotter pins) and pads load from the top.

Dynapro 4 Piston RED Caliper Upgrade for Big Brake Kits 1990-2005
Dynapro 4 Piston BLACK Caliper Upgrade for Big Brake Kits 1990-2005

** Bolt-on replacement for ANY 11" or 11.75" kit that currently uses the Dynalite 4 piston. Your brackets, lines, etc. are all compatible.

** Same balance: Piston size is the same 3.00 in² so brake bias remains the same.

** Same great wheel clearance: the body width is actually a hair narrower than the Dynalite, and height is the same.

** Same great pad options: The DynaPro 4 uses the 7812 pad shape. Same wide variety of affordable pads as you have with the Dynalite - Hawk, Porterfield, Carbotech, Cobalt, etc. We now list the pad shape "code" in the title of all of our pads, so you can view our pad options for this caliper by simply typing "7812" in the search box on our site: Good-win-racing.com

** Some pads for the Dynalite will fit the DynaPro as well; Pads by Hawk and Performance Friction which use the generic 3-hole backing plate drop right in to the DynaPro - all you need to do is swap the DynaPro's E clip for standard cotter pins, or notch the pad's backing plate to clear the E clip. Our PFC pads have this note and can be found here.
Yes, you can run Porsche Cup Car pad technology for less than $80/set of pads in these.

https://www.miataturbo.net/attachmen...ine=1439925764

https://www.miataturbo.net/attachmen...ine=1439925764

https://www.miataturbo.net/attachmen...ine=1439925764

Originally had these priced as a pair but it wasn't clearly stated so some guys thought each caliper was well over $200. Not so!

Price is now per caliper, a huge leap forward in feel and performance for only a few dollars more than a Dynalite replacement.

-Ryan

Idk if the site hasn't updated for me, but it still says the black is 289. Is that per pair or per caliper?

The site will refresh at midnight.

Black is $144.50

Humm... still seeing $289.00

Neat product, are these guys new from Wilwood?

Thanks for pointing this out. I've forced a refresh now that I'm in the office, not sure why it didn't take the change earlier. Should be good now.

The DynaPro 4 has been around for a bit but it has now reached a pricepoint that makes it a no-brainer substitute for the older Dynalite. Back when it was close to $300 per caliper (most likely due to lower production quantities) it wasn't justifiable.

-Ryan

<p>What makes the lug mount dynapro less flexy than the lug mount dynalite? I thought the flex came because we were using lug mounted calipers instead of radial mounted.</p>

The strength of the caliper itself affects overall rigidity by a whole order of magnitude more than the relatively small difference between radial and lug mounting styles - assuming that you have a strong, well engineered caliper bracket in either case - either of those bracket styles could be designed poorly and that would then increase flex.

The dynalite's body is just significantly flexible for a "fixed" multi-piston caliper, and this is much improved in the DynaPro. The dynalite is old - like, same caliper that was used in the original Goodwin Racing BBK nearly two decades ago. Tech has come a long way, and the DynaPro brings many improvements with it.

Of course the big benefit in staying with the lug mount version here, is the caliper "drops in" to your current kit in place of the Dynalite, rather than having to change to a whole new kit with an alternate mounting design.

I've used both the DynaPro 4 Radial mount (as used in the newest version of the V8Roadster BBK) and the DynaPro 4 Lug Mount retrofitted to a kit that came with a Dynalite and pedal feel is similarly excellent between the two, both feeling substantially better than the Dynalite.

<p>Thanks for the detailed response!!!!</p>

We carry the full range of Hawk and Porterfield pads for the 7812 shape that fits the DynaPro. Carbotech also makes their full range in this shape, so you're well covered with drop-in pad options for this caliper.

The info I touched on in the original post is that the 7112 (Dynalite) pads are actually the same size and thickness as the 7812. Many of the brands making those pads use a standard 3-hole backing plate, which actually has the two side holes needed for the 7812's pins in addition to the center top holes for a 7112 cotter pin. This gives you even more options, so if you already have 7112 pads on your shelf, or if you want to run a pad that is available at super low cost for the Dynalite - such as Performance Friction - you can actually do that quite easily one of two ways:

A) The simplest solution is to swap the DynaPro's Quick-E-Clip for a pair of standard cotter pins and voila, these 3-hole 7112 pads fit in the DynaPro. No pic necessary as it's super straight-forward.

B) But, if you're a big fan of the Quick-E-Clip like me, a little notching of the backing plate will make everything clear the E-Clip's pins in the center and you're good to go.

Here's a pic with the standard 7112 PFC pad on top, and the same pad modified below it. I got a little fancy with the carbide grinder on these, but three simple straight cuts will do the job, since you don't need any of that center portion:

https://www.miataturbo.net/attachmen...ine=1440097262

Voila, $75 PFC pads in the DynaPro caliper with the E-clip:


https://cimg1.ibsrv.net/gimg/www.mia...e70fad4da0.png

Ok, so that's neat. Thank you for taking the time to do the work and post the pics!

I want to know more about the thing we discussed in the other thread, so I can eventually buy your rear kit to go with these calipers on my existing 11.75 front kit. :party:

<p>Aidan's rambling thread becomes relevant!!! Wooo.</p>

Its not like anyone would ever be able to find that info in that thread anyway. I didn't even bother to try to find the comment to link to it :giggle:

<p>learn2searchnoob</p><p>Took me 5 seconds.</p><p>https://www.miataturbo.net/build-thr...1/#post1258487</p><p>Search terms: Thepass dynapro</p>

<p></p><p>As in the front and rear calipers will be different?&nbsp; IOW, I could not pick up a new set of DynaPros for the front of my car (Goodwin BBK) and move the existing Lites to the rear.&nbsp; If different, will the rears have a parking brake or at least the option for one?&nbsp; I was currently considering FM's rear calipers with V8R's rotor.&nbsp; Though that's big $$$.</p>

<p>From what Ryan said yesterday was that the rear calipers will be different and have a different bias, but same pad.</p><p>No parking brake :(</p>

Rear caliper needs totally different piston size, and front calipers are for the wrong rotor width to boot.

More info when we release things ;)

Want...yesterday! Will fill my shelf with these pads.

Parking brake? (I know, but just encouraging).

+1 for just notching the pad.


"Working with Wilwood on a custom DynaPro 4 for the rear of the car that matches the bias we want with correct piston size back there, but will take the same 7812 pad as the front."

There isn't going to be a parking brake from what was said yesterday.

https://www.miataturbo.net/build-thr...1/#post1258544

I still think there's quite a few people who'd love a little standalone park brake option :)

If it weighed -4 pounds, maybe. A standalone parking brake + wilwood caliper is going to weigh more than a factory caliper does.

--Ian

<p>I wonder what Jaguar's electrically actuated parking brake weighs.</p>

And if you are some other company that sells a Wilwood rear caliper set-up and add a parking brake it increases the cost by about about 41% (still want, though).

What I am psyched about is this is being worked up to keep a good F/R bias balance.

No further details on products for the rear for the time being. Naturally, lots of track testing before anything gets a green light, I don't want to make any hard promises on a configuration that may change during development.

Upgrade to DynaPro 4-piston fronts!

<p>So I stuck some BP-10 7112 in my dynapros last night, and the hole where you put the cotter pin is way bigger than on the dynalite, do we need a bigger cotter pin?</p><p>This picture might explain it:</p><p>https://www.miataturbo.net/attachmen...ine=1441400790</p><p>See how the cotter pin like fell all the way through?</p>

What about this?

https://www.miataturbo.net/attachmen...ine=1441401278

More reusable, too.

Would not fit through pad. There is a spring clip I think 949 sells.

Doesn't have to be that big. Looks like a 6-32 or 8-32 would fit. Drywall anchor screw size, long enough and usually pan head.

I'm going to do something like that. I don't want a bagillion cotter pins.

http://949racing.com/quick-release-pins-wilwood-dynalite.aspx

For 7112 in the Dynapro you need 2 cotter pins per caliper, in the two outside holes, no use for the center hole as on the Dynapro that hole is for an optional bridge bolt, not a cotter pin. The Dynapro doesn't have pad keepers on the bottom, so the height of the pad in the caliper is regulated by the pins alone, thus the need for two of them.

Could I drill out 7112 center hole for a bridge bolt?
<br />Only asking because G is giving me a set of 7112 bp-10s and they don't have the 3 hole.

The bridge bolt is not intended as a slider pin, so while you might be able to drill out the backing plate for a bridge bolt to fit through, that doesn't satisfy the need for locating pins for the pads to slide on.

The ability to run some 7112 pads in the Dynapro is a big deal for expensive/top-tier compounds that aren't available on 7812-specific backing plates (Dynapro uses 7812). A BP-10 is like, $35-$45, and available in both 7112 and 7812. Really no reason to try to mickey-mouse the 7112 version into working in that case.

Except these pads were free, and free is cheaper than $35. But point taken.
<br />What's the bridge bolt for.

Except these pads were free, and free is cheaper than $35.

I can't argue with that ;)

What's the bridge bolt for

"Bridges" the gap between the two halves of the caliper. Adds rigidity. It's a bit of an afterthought on the DynaPro and not very necessary IMO. It's already significantly more rigid than say, the Dynalite.

<p>Question for someone who had DTC-60 7112's in their hands.</p><p>Looking at hawk pictures for the DTC-60 in 7112 I don't see the 3 holes. Is this an error, or is the DTC-60 one of the pads that doesn't have the 3 hole backing.</p><p><img src="http://cimg3.ibsrv.net/gimg/www.miataturbo.net-vbulletin/792x792/80-hb540_d90676d618d1826fcc9da9e61c5ae50646459ee2.jpg " title="" /><br /><br />&nbsp;</p>

If I run Dynapro's in front with PFC01s what pad do you recommend I run for my rear Sport brakes?

Thanks!

Looking forward to seeing this rear kit.

PFC01 in the rear. Get the standard 1.8 rear pads and with a little backing plate shaving they can fit the sport calipers. I don't have pics of the process since none of us run the sport rear caliper here, but lots of guys have done it.

Is it safe grinding the backing plate down with power tools? A post in the big brake thread recommends using a hand file:

I plan to install my new Dynapro and PFC01 combo later this week and would much rather use power tools to modify the backing plate.

Johnny (OGRacing) is our distributor for PFC pads and the one I consulted when originally looking for a PFC option for the Dynapro. Grinding the backing plate to clear was his suggestion and also got the OK from a PFC engineer.

Thanks. I was not looking forward to filing that much material off by hand.

Will the 949 pins work?

Quick Release pins- Wilwood Dynalite

No, the pin slots on the Dynapro are wider than on the Dynalite.

--Ian

In other words, cotter pins designed for the dynalite are not long enough to work in the dynapro.

Don't I need PFC 11 for the rear. I can't find PFC 01 for the rear