Flame Sprayed Aluminum
Housings
Now available, a series of Aircraft Grade A356 aluminum alloy
side housings to replace many of the heavier cast iron stock assemblies found
on all 1974 and later 12A, 13B, 20B, and 13G engines. These housings offer both
the obvious advantage of significant weight savings and greatly increased wear
resistance, even under high horsepower demands. Furthermore, these housings can
be used in conjunction with the stock cast iron housings, as budgets and
applications dictate.
As an example of the significant weight
savings: a stock, intermediate housing on a 1993 13B turbo engine weighs 25.9
pounds, while the aluminum replacement weighs just 10.5 pounds, nearly a 60
percent weight savings. The stock rear housing on this same engine weighs 25.8
pounds, while the aluminum replacement weighs just 13 pounds, again a savings
of nearly 50 percent.
John here, is holding a complete 13B block
which weighs in at an astonishing 109lbs.
After each aluminum
housing is cast using A356 Aircraft Alloy, it is heat treated to
“T-6” hardness and then CNC-machined prior to being flame-sprayed and
ground to a final finish. The greatly increased wear resistance is the result
of this aerospace originated flame spray (or plasma spray) process that imbeds
into the wear surfaces a proprietary carbide material whose durability greatly
exceeds that of the nitride surface found on the stock cast iron
housings.
The Flame Sprayed Aluminum housings are offered in a variety
of combinations: 1) with machined water jacket O-ring grooves for the 1974-85
engine applications or without these grooves for the 1986-95 engine
applications; 2) with side ports* (based on the 1993 porting configuration) or
without side intake ports for peripheral port applications; and, 3) either top
or side starter positioning (20B application). 6-Port configured housings are
not offered.
The intermediate housings available provide additional
material for machining of fuel injector sockets should your application require
such a feature. While the rear housing has no provision for an oil pressure
regulator, you have the option of mounting a stock Mazda regulator in the side
of the oil pan (wet sump) or using the internal oil pressure regulator
typically included in most dry sump pumps.
*Note - The housings “as
cast” are for peripheral port applications. If you desire to port your
housing(s), contact us for details on porting configurations available. These
housing are fabricated to your exact specifications. Contact us for ordering
information at (562) 426-7960. Exact pricing can be provided once the engine
specifications are reviewed by Mazdatrix.
Prices on these housings are
subject to change. |
