|Zero and Zephyr Feature List |
These two new turbochargers represent the most recent evolution of our direct fit style turbos for the
Lancer EVO4-9. These 2 units answer the call for improved performance at higher boost pressure and
They debut our release of the new Xona Series CHRA which are a billet SS construction featuring
expanded water jacketing which fully surround the entire hot side register for improved heat blocking in
the turbine section. Better materials extend the service life through improved corrosion resistance and
reduced heat conduction into the bearing section of the CHRA. The rotating assembly is isolated from
vibration 3 dimensionally via specially designed oil damping chambers which also serve to provide
variable preload to the angular contact ceramic ball bearings ensuring that bearing preload increases
with oil pressure, rpm and thrust loads a feature never before seen in ball bearing turbochargers.
Correct loading of angular contact ball bearings and bearing temperature are the determining factors
when it comes to the lifespan of the ball bearing. The features do not end there.
The aeros selected for these two new units are also very impressive. The
79HTZ and the 86HTZ both represent the newest evolution of our billet compressor wheels that have
defined aftermarket turbocharging since our release of billet compressor wheels in 2007. Flowing
65lb/min and 75lb/min respectively and allowing PR as high as 5:1, these new aeros deliver perfectly
matched flow for your 650HP and 750HP high pressure ratio 4G63 applications. Couple this with the
enlarged high pressure ratio turbine wheel which is 68/62mm vs the 67/59mm found in our Green, Red
and Black models and you have made to order domination over stock appearing performance classes in
both 650HP and 750HP sizes.
The turbine housings used for these models are equally impressive. Constructed in special high strength
Stainless steel (more than twice as strong as 304SS at operating temperatures) they can survive
thousands of hours at steady state 1700F+ temperatures. The use an integrated external TiAl MVS
wastegate for boost control eliminating one of the inherent shortcomings of the earlier generation
turbos which was the flapper valve and actuator assembly. The housing is a 10.5cm2 nozzle without a
divider wall to reduce the pumping loss thru the turbine section of the turbo. This comes at a slight loss
of part throttle boost response below 4500rpm, but is all part of hitting these higher power numbers
and creating an efficient high boost turbocharger for the 4G63.
The compressor housings feature large volume open Flow Advancement Ports like previous generations.
This opens style port, the FAP, style is a large benefit to dealing with low flow/high pressure ratio
compressor instability as well and increasing high flow/ high pressure ratio choke flow by feeding the
splitter blades directly something that bullet holes cannot achieve.
These turbos represent our best work to date.