We've been bringing the import arena the most advanced pistons available
for the last year and a half. In our efforts to continue providing enthusiasts
with pistons configured specifically for their applications we have added, and
will continue to add, new configurations and engine models to our line of
hard-core pistons.
As most of you know, all our pistons are produced to our specifications by
Wiseco and then custom configured (valve relief size and depth) and hand
finished here at Endyn. This enables us to provide our customers with pistons
specifically configured for his exacting application, resulting in considerable
performance advantages over other more "generic" pistons on the
market.
Aside from the uniquely configured tops, some of the standard features of
our Roller-Wave pistons include application-specific alloys to control
expansion, anti-detonation / pressure control grooves above and between the
rings, high strength pins with hone-fitted bores, and match-balanced sets.
Honda enthusiasts are already familiar with the Roller-Wave concept and
the combustion efficiency advantages it offers over other more
"generic" pistons. Recently Wards Auto World featured some pistons
being developed by a major OE supplier, incorporating special
"turbulators" at the four corners of the pistons. Astute observers
have noted that these first appeared in our ECFI piston line, attributing to
their ability to run on a wide variety of air/fuel ratios without attendant
detonation.
Please note the "turbulators" at the corners of our piston
(A&B) and the uniquely configured dome.
We also offer custom pistons configured for one-off applications with
different bores, compression heights, ring size / packages, as well as different
domes.
The pictures above and below show some of our B series Roller-Waves
configured for forced induction with custom compression heights designed for
customers with "unique" needs, such as longer strokes, rods, and odd
bore diameters.
Our newest Honda series pistons are for the Prelude H-22 line of engines.
We've pushed the performance envelope well beyond the factory H-22 "S"
series piston design with domes configured for more compression, valve reliefs
designed for your specific valve diameters and cams, lightweight pins, and all
the other classic Roller-Wave features.
Note our uniquely configured dome tapers out to near the edge of the
piston to "purge" the combustion chambers of gasses, providing
valuable "squish" to work in conjunction with our stepped quench pads.
Of course, the precisely contoured reflector slot is readily apparent on the
exhaust side of the piston as well as the radiused edges and smooth finish.
Note the
differences in dome height between the Roller-Wave and the Type S piston.
Say you want to play with the big boys, eh? How about 90mm bore sizes for
the H-22 Roller-Waves. Note that we brought the sides of the dome out to the edge of the piston,
mandating combustion chamber rework for this all-out piston
configuration.....but if you're going 90mm, headwork is a "given",
isn't it?
As you can see, the dome on the 90mm piston (on the right) isn't simply
the same as the smaller bore piston on the left. While other manufacturers may
be content with sticking a "generic" dome on their pistons, we've
designed the domes to fit the bore, providing the chamber interaction necessary
to make big power, while lessening the chances of detonation.
As you can see, the dome on the 90mm piston (on the right) isn't simply the
same as the smaller bore piston on the left. While other manufacturers may be
content with sticking a "generic" dome on their pistons, we've
designed the domes to fit the bore, providing the chamber interaction necessary
to make big power, while lessening the chances of detonation.
While our high compression normally aspirated pistons have been run-away
success stories, we've also paid attention to enthusiasts desiring pistons that
will provide big performance increases, while running gas with less than
desirable octane levels. We've previously been able to modify existing forgings
to drop compression ratios into more moderate zones, however, we now have
forgings machined explicitly for compression ratios ranging from the mid 10's to
the mid 11's. These pistons incorporate all the Roller-Wave features, with domes
that are somewhat lower. These pistons also are also great for those running
nitrous, without expensive plumbing and electronic controls.
In this picture you see our high compression B20 piston on the left with
one modified for a more "moderate" ratio in the center. The piston on
the right is based on our newest forging and it's specifically designed to yield
lower compression ratios for special situations.
Another view of the same pistons in the same order from left to right.
Another view of the same pistons.
Note the difference in dome heights between our high compression piston on
the left and the lower compression part on the right.
Another view of the two pistons. High compression piston on
the left and the lower compression part on the right.
This picture shows our B20 lower compression piston on the left, with the
smaller bore B18 piston on the right. Of particular interest note that the sides
of the domes extend close to the bore to provide excellent "squish",
the edges or fences of the intake valve reliefs for mixture atomization and
control, the stepped quench, and of course, the reflector groove across the
exhaust side.
Another view of the B20 (right) and B18 (left).
It should be quite obvious that our latest offerings have been developed
to provide the "edge" that serious enthusiasts demand in today's
performance environment. We've been providing serious competitors with
advantages such as these components for almost 30 years now and we've got a lot
more in store for imports in the very near future. We'll continue to shake-up
the industry........so stay tuned, there's a lot more coming.
- The Old One
For additional info about combustion space and our
design philosophy, read The
Soft Head 1999.
