Cryogenic Brake Kit - Super Chevy Magazine

Praise Dyno Brake's cryogenically-treated "Stage III" brake drums and "semi-ceramic" brake shoes for Tri-Five Chevys are a dead-nuts replica of OEM, yet they dissipate heat faster, stop quicker, and weigh 24-26-percent less than their cast-iron counterparts. These components are sold either as a kit, complete with wheel cylinders, brake hardware component pack, and heavy-duty master cylinder. For our project vehicle we ordered up a set of four Praise Dyno Brake Stage III Thermo Cooled 11-inch Brake Drums (PN 60001), a pair of Stage III Semi Ceramic front brake shoes (PN PS-228), a pair of Semi Ceramic rear brake shoes (PN PS-9), one of Praise Dyno Brake's Stage III Trick Spring kits (PN 7020), a pair of left front and right front high volume front wheel cylinders (PN WC-20932 & 33), a pair of right and left high volume rear wheel cylinders (PN WC-13387 & 88) and one of Praises Stage III Master Cylinder replacements (PN MC-2100).

Praise Dyno Brake's cryogenically-treated "Stage III" brake drums and "semi-ceramic" brake

Cryogenics play an important part in the automotive industry. But what exactly is it?

It is part of a process known as "materials engineering," according to Praise Dyno Brake's founder and CEO John Ambrose, manufacturer of the highly touted, Praise Dyno Brake, "Stage III" pre-'70 musclecar brake pads and brake shoes.

Brake drums manufactured out of cast-iron retain heat and are prone to warpage. Cryogenically-treated, or "pressurized thermo-cooled" composite cast brake drums like those we offer as part of our Stage III Muscle Car kit for the '55-57 Chevrolets, dissipate heat as much as 50-percent faster than OEM, lessening the wear factor and possibility of warpage," says Ambrose. In the process, braking performance is enhanced along with the life of the overall product.

Pressurized thermo-cooling is a computerized controlled process in which the brake drums are slowly brought to a temperature of-310 degrees F, under pressure, held stable for 60 hours, and then slowly returned to room temperature. As a result the microstructure of the steel is changed by aligning the molecules, or bringing them closer together, eliminating air gaps (porosity) in the metal surface. The end result is an increase in component strength and density without extra weight.

Throughout this process, the pressurized thermo-cooled materials retain their original size and shape, and although this new cryogenized material is stronger at lower temperatures (following treatment) there is no change in yield or tensile strength.

This means it is possible to build a higher-tolerance, quicker heat-dissipating OEM-type brake drum which looks technically correct from the restorer's viewpoint, yet weighs approximately 24-26-percent less than its OEM cast-iron counterpart.

Doug Auzene and his "Rocket Muffler" '55 Chevrolet wagon were ideal candidates for Praise Dyno Brake's Stage III thermo-cooled brake drums and semi-ceramic brake shoes as he and the wagon compete in both the Wally Parks/NHRA Motorsports Museum-hosted California Hot Rod Nationals events and the Good Guys nostalgia racing series. Auzene also bracket races the '55 at LACR.

Doug Auzene and his "Rocket Muffler" '55 Chevrolet wagon were ideal candidates for Praise

Praise Dyno Brake's "semi-ceramic" brake shoes also feature a higher coefficient of friction over straight metallic, or semi-metallic OEM brake shoes, creating less pedal pressure while stopping in shorter distances.

Praise Dyno Brake's "high volume" wheel cylinders are also a direct OEM replacement. However, these 1/8-inch-larger-bore wheel cylinders move more fluid through the system, requiring less pedal pressure.

The company's "Trick Spring Kit," features 31-psi "pullback pressure" versus OEM's Tri-5 13-pound tensile strength springs which tend to "ride" the swept surface of the brake drum causing excessive heat, and premature wear. When up grading your classic Tri-Five to Stage III fitment, the manufacturer recommends that you install one of their new, OE master cylinders to insure that your Tri-Five's brake pressure is performing at maximum capacity.

Slated to perform the installation was Peter Giannoulis from Sun Valley, California's PJ's Automotive. "The thing that I like most about the Praise Dyno Brake Stage III kit is that it's all high quality stuff," said Giannoulis.
Slated to perform the installation was Peter Giannoulis from Sun Valley, California's PJ's
At the front, once the vintage material was removed, the first order of business is the installation of the higher capacity Praise Dyno Brake Stage III heavy-duty wheel cylinder that is bolted up to the OEM backing plate via two 5/16-inch bolts.
At the front, once the vintage material was removed, the first order of business is the in
With that done, basic brake assembly begins with the attachment of both left and right side Praise Dyno Brake semi-ceramic brake shoes. Next comes the installation of all the (new) brake adjusters, keepers, and return springs, which are integral components in Praise Dyno Brake's Trick Spring kit.
With that done, basic brake assembly begins with the attachment of both left and right sid

We kick things off at the rear by installing the OE factory plungers into the ends of the Praise Dyno Brake heavy-duty wheel cylinders. Peter then installs the unit into the factory Tri-Five backing plate.
We kick things off at the rear by installing the OE factory plungers into the ends of the
The factory brake line is re-attached using a 3/16-inch line wrench.
With front brake components fully installed, it's time for "mic"-ing, and adjusting the outside diameter of the brake shoes, using a brake drum micrometer. Once completed, the Praise Dyno Brake Drums are installed.
With front brake components fully installed, it's time for "mic"-ing, and adjusting the ou

Next is the installation of the emergency brake cable arm onto the secondary brake shoe.
Both primary and secondary brake shoes are installed onto the '55's brake drum factory backing plate for keeps.
Both primary and secondary brake shoes are installed onto the '55's brake drum factory bac
Once again, Giannoulis uses his trusty brake drum micrometer to check the inner, and outer diameter of the Praise Dyno Brake, Stage III thermo-cooled brake drums, and Praise Dyno Brake semi-ceramic brake shoes then he installs PDB's thermo-cooled lightweight rear brake drum.
Once again, Giannoulis uses his trusty brake drum micrometer to check the inner, and outer

Last step is the installation of Praise Dyno Brake's OE-type, heavy-duty master cylinders. Note that it a dead-nuts copy of the original. With the new master cylinder installed, the system is purged, and power-bled.
Last step is the installation of Praise Dyno Brake's OE-type, heavy-duty master cylinders.
With the added benefit of superior stopping power, owner Doug Auzene made another change aimed at lowering his elapsed times. Here we see Western Tire's (Burbank, CA,) Brian Tashjian mounting up a pair of 235/60xR15-inch BF. Goodrich Drag Radial T/A's.
With the added benefit of superior stopping power, owner Doug Auzene made another change a
Here we see Auzene testing out his new combination at Irwindale Speedway. Powered by a Richard Johnson/Fiasco Automotive-built 330ci .030-over 327 Chevrolet, the car will run 13.7s at 105 mph in the quarter. "At 3,800 pounds, we're talking about a LOT of weight to slow down," says Doug. "Since installing Praise Dyno Brake's Stage III thermo-cooled brake drums and semi-ceramic brake shoes, this old relic stops a LOT quicker than it used to. Like about twice as quick!"
Here we see Auzene testing out his new combination at Irwindale Speedway. Powered by a Ric

SOURCES
Praise Dyno Brake 1061 S. Munson Rd. Royse City TX 75189	Irwindale Speedway 13300 E. Live Oak Ave Irwindale CA 91706
P.J.'S Automotve 8957 Glenoaks Blvd Sun Valley CA 91352