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RACING NEWS Normally you will experience a
slight increase in Rockwell of a point or two, not much of a change, but still
improvement in the right direction. The
big improvement is stress relief and stabilization.
Engine parts, transmission parts , or any non cryogenic treated parts you
are thinking about are full of stress and just waiting to distort when it
reaches racing temperatures. All
machined parts can distort if they have not been stress relieved.
Pistons can change from round to oval due to stress and temperature.
When this happens the piston drags the cylinder wall which takes
horsepower away, creates heat, and wears the cylinder walls.
It then requires the engine builder to rebore the cylinders by 2 to 3
thousandths. Cylinders that have
been Cryogenic treated will normally be out of round only a 1/4 to a 1/2 of a
thousandths, a big decrease in wear from a non treated cylinder. The end result of Cryogenics
treatment of your engine is
improved performance with far less wear and less breakage.
What parts should be Cryo treated?
All parts that wear, break, or distort.
Sheet metal, electrical parts, water pumps, oil pumps, or fuel pumps
should not be treated. The following are various parts
of an engine and what you can expect to occur after the Cryogenic treatment: BLOCKS:
The treatment of the engine blocks should not only result in improved
performance with less wear and breakage, but the stress relief and stabilization
of the block should result in reduced distortion in other parts such as
crankshafts and camshafts since they are no longer flexing and distorting.
One instance with an aluminum Rodeck engine running in a winged sprint
car during a season showed the engine blew five times, each suffering from a
broken connecting rod. The next season using the same block only Cryogenic treated
the owner notified us that after 31 races he had no engine part failures.
The big difference now was increased performance which resulted in new
chassis set-ups. CRANKSHAFTS AND RODS: Reducing the stress from the large mass made up of the
crankshaft and rods can help them stay more in balance allowing for improved
performance with reduced wear and breakage. PISTON ASSEMBLIES:
The piston assemblies should not
be treated with the rings installed on the pistons.
Wrist pins should not be treated at all.
Treating the piston assembly will help the pistons and rings remain round
therefore maintaining a better seal which translates to more constant
compression , improved performance and reduced breakage. HEADS:
Heads both cast and aluminum are less prone to distortion and breakage
following the Cryogenic treatment. If
you have a set of good heads that are cracked send them to a good head repair
company. They will grind out the
crack, build up that portion that was cracked and machine it back to original
specs. All these steps put stress
back into the head, left untreated
this will cause distortion and cracking can occur.
Cryogenic treatment should be applied to the heads following repair then
the finish machining can be done. CAMSHAFTS:
Although camshafts don’t seem to suffer breakage, wear can be a problem
With Cryogenic treatment this wear can be greatly reduced. VALVE SPRINGS:
We have received many reports concerning the Cryogenic treatment of valve
springs. Valve springs from 4-cycle
go karts, quarter midgets, and motorcycles have often showed an increase in
pressure (5-15%) and improved life of 100% or more.
Automotive valve springs as well as Top Fuel
drag cars have shown an increase in life. PUSHRODS, LIFTERS, VALVES: These should all be treated but do not have any really good
feedback on advantages. ROCKER ARMS:
Stock automotive to high quality rocker arms with bearings are good
candidates for Cryogenics. INTAKE MANIFOLDS:
Automotive intakes with carburetors should have the intake manifolds
Cryogenic treated. If you have the
block, heads, and all the internals Cryo treated, and thus stress relieved, it
only makes sence to have the intake done as well. Bolting a non-Cryo intake to an engine that has been
Cryogenic treated is only introducing stress back into the picture. RING AND PINIONS:
Cryogenic treated these parts will show less wear and last longer.
AUTOMATIC TRANSMISSION
PLANETARIES: By reducing wear and
breakage of planetaries, the rest of the automatic transmission stays in proper
alignment and therefore the rest of the transmission suffers less wear and
breakage. INPUT SHAFTS:
By Cryogenic treating of the input shafts wear and alignment can be a
huge benefit. STANDARD TRANSMISSIONS: Even air shifted Pro Stock 5 speeds are operating with
less wear and breakage. You should
do the entire transmission completely disassembled, including the case. BRAKE ROTORS: Cryogenic treatment closes the grain structure of the rotors resulting in an increased contact area for the pad to touch against and also reduces the abrasiveness of the rotor against the pad therefore increasing pad life |
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Last modified: November 11, 2002 |