Please ask if you do not see your particular engine series or type listed.
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A-series
The
Honda A16, A18, A20 scraper is designed to fit inside the stock windage tray but can be
used by itself. You must specify the engine as the strokes are
different. We also make a surge baffle for the A20 stock
steel sump -- it has tabs where you weld it in place: $99.95
for the dual scraper and $35.00 for the pan baffle with trap
door. The TeflonŽ bladed versions of the dual scraper design
run $199.95.
NEW! New dual
scraper design:
TeflonŽ bladed version:
These pictures below show the earlier single scraper design -- they
illustrate how the scraper fits within the factory windage tray and
also how it attaches to the engine.
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B-series
Independent dyno testing of the B16 series
scraper by Don Flores at DFE in Jacksonville, FL showed a 1.5 % to 2.5 % hp increase depending on RPM. Remember
this is an increase on an engine that already has a full windage
tray! Don performed this testing on our early upstroke single
scraper design. Our scrapers are now dual designs -- working on both
the downstroke and upstroke.
Here are a couple of pictures of the downstroke blades taken
during the manufacturing of a Teflon B18C scraper; the blades reach
up into the block:
High performance B-series engines
like the high revving B16 and B18C series have multiple oil squirters for each bore.
Many people are not aware that these engines have twenty oil squirters
directed at the bottom of the pistons! The oil that is injected under the
piston is critical for removing large amounts of heat and Honda
engineers have determined that the large number of squirters is
needed for the engine to meet OEM durability standards.
There are four squirters linked
directly to the oil galleys:
... and sixteen squirter slots located on the sides of the rods:
All this adds up to a significant amount of oil that needs to be
removed from the windage cloud as quickly as possible and returned
to the sump. Please look at the windage tray pictures a bit
further down.
The B16, B18 and B20 scrapers we make come with internal baffles that perform two
functions: 1) They help guide draining oil from the head past the
rotating assembly; 2) they help to segregate bays 1-2 from 3-4.
In a four cylinder inline engine cylinders 1-2 and 3-4 exchange
displaced gas from the rising and falling of cylinder pairs.
Windage with entrained oil follows these exchanges. It is
advantageous to restrict the travel of windage from the first
cylinder pair to the second and vice versa.
 These pictures illustrate a
dual B18C series scraper.
Dual scraper equipped B16 in flight
Our scrapers are designed to work in concert with the stock
windage trays:
B-series dual scraper with internal baffles (please specify
engine): $134.95
TeflonŽ bladed version: $234.95*
The TeflonŽ bladed version is designed to safely run at zero
clearance for maximum efficiency. Scott Seck has been running
one of our dual Teflon scrapers in his track car for three years
now:
* The stock windage tray for the B engines NOT using
a girdle needs to be clearanced for the Teflon clamping pieces.
We can perform this clearancing
for $50 if you wish on your provided new or used stock windage tray.
The girdle equipped B18C series engines have a deeper windage tray
that does not require this clearancing.
Modified B series windage trays:
Modified stock windage tray -- suspended directional screening is
added to the interior of the tray to capture high speed oil droplets
and dissipate their energy -- this also shields the draining oil
beneath and helps stop oil from bouncing off the smooth steel and
being struck again by the rotating assembly -- all this helps to
lower the oil temperature and reduce parasitic power losses.
Here are a couple very interesting pics of used pans sent in by
racers. As I was preparing them for the screen installation it
dawned on me to take some pictures to show how much oil there is
hitting the inside of the windage tray and the path it follows.
The picture below is after I had sprayed the pan with some WD-40
to loosen the grime. I then wiped it with a towel and snapped
the picture. The red outline is about where the screening
sits.
The next picture again shows the above tray but it is sitting
above another tray that I have not cleaned at all -- the witness
marks are more intense. Remember -- this is from long term
high-speed "windage" oil impacts -- not from oil splashing up from
the sump. This high speed oil bounces back off the tray and is
hit over and over again.
This picture below shows an example of the clearancing
needed for the TeflonŽ blade and clamp mentioned earlier:
The pictures below show the same screening added to the interior
of a B18C5 or B18C type R tray. The second picture has the
girdle resting on it to illustrate how it fits in between the
screening panels:
Honda B16-B18 series without girdle: steel scraper version
$109.95; TeflonŽ bladed scraper version $159.95 (includes clearancing
the tray).
Honda B18C5 or type R series with the stock
girdle: steel scraper version $109.95; TeflonŽ bladed scraper version
-- also $109.95
Note: These prices do not include the cost
of a core stock tray -- you can send one to us or we can add the
cost of a new one to your order.
In general, please contact us if you plan on using some
combination of parts from different engines or if you are using an
aftermarket girdle. This generally is not a problem but we do
need to be aware of it as it will affect the designs.
Again, we do offer custom designs for
knife-edged or stroker cranks and a template service if you want to pre-fit a
plastic pattern for us to then scan.
We also have internal baffle patterns to
suit the excellent Dart block -- the casting is somewhat different internally.
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F and H series
The F and H series engines now have
a dual scraper system that works on both the up- and down-stroke of
the rotating assembly. For engines that have stock oil
squirters we have both a steel and TeflonŽ design that allows the
squirter rail to pass through the scraper and be installed.
The squirter assembly passes through and rests on the
scraper frame (which acts as a gasket for the banjo fitting). Small custom
washers/spacers are provided to lift the jets by the same thickness as the
scraper frame. To people familiar with the engine, installation might seem
to be impossible because of the girdle structure but it is actually quite
straight forward. The F and H series dual scrapers run $69.95
Here are the
non-squirter designs:
Here are the designs for use with squirters:
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D-series
Independent dyno testing of the
original D16
scraper by Church's in L.A. showed a 1.5 % to 3 % increase in hp
depending on RPM. Many people thought that the massive girdle
structure present on the D-series engines would make scrapers
redundant -- this is not the case!
Congratulations to Fred Robertson
Ohio Valley Region STS2 Class Champion 2006, 2007
Our D15/D16 design
attaches along the girdle and does not interfere with the closing of
the aluminum or steel pans used on these engines. See photos
of D16Y8:
These D15/D16 scrapers are also available in TeflonŽ.
The TeflonŽ framework does require slight adjustments for clearance
in the cast aluminum sump.
Note that we now include a thin
version of our original pan rail mounted design so that the D-series
engines can have the benefits of a dual scraper that operates on
both the downstroke and upstroke of the engine.
$74.95 for the steel dual scraper
set and $174.95 for the set with the TeflonŽ bladed downstroke
scraper.
D series windage tray
option
The windage tray option includes
the dual scraper set as well as directional screening around both
sides of each bay on both sides of the girdle.
The windage tray shown below has a TeflonŽ bladed scraper; the
exact screening designs will vary depending on what engine and pan
combination you will be using.
$299.95 (steel scraper version); $399.95 (TeflonŽ
scraper version)
Boylans with one of the D15 windage setups
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