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L4: A16, A18, A20, B16 (series), B18A1, B18B1, B20B4,
B20B4,
B18C1, B18C5;
D15XX (this is a universal pattern for the D15 --
includes EW3 and EW4);
D16XX
(this is a universal pattern for the D16);
F22,
H22, H23.
Please ask if you do not see your particular engine listed.
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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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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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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.
New D15 windage tray and scraper
setup; the one shown has a TeflonŽ bladed scraper; the top screen as
seen in the D16 system below is left off as the clearance with the
stock steel pan is too close:
Boylans with one of the D15 windage setups
Note that dyno testing of the 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!
A unique directional screening windage tray
is available for a Honda D15 or
D16 engine. As well as stock pans, it should fit in most aftermarket pans
with little or minimal adjustment and help improve their efficiency and lower
oil temperatures. This tray has an integrated crank scraper that is
accessible for adjustment. Oil is caught by the screening before it can
bounce off the sheet metal of the pan; it is then free to drain to the sump of
the pan. The passages where oil drains from the head are also further
isolated from the rotating assembly. $299.95
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Dyno testing of the B16 scraper
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!
 
B16, B18 (B,C) -- please specify engine as the patterns are
different. Important! The patterns are available in
TeflonŽ but the B-series windage trays from an engine without a
factory girdle will need to be clearanced (B16, B18B1 etc.); the C
series no -- because it does have a girdle (B18C5 -- also known as
B18C type R). We can perform this clearancing
for $50 on your provided new or used stock windage tray.
The B16, B18 scrapers 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 follows these exchanges. It is advantageous to
restrict the travel of windage from the first cylinder pair to the
second and vice versa. You will see this design cue in more
modern engine designs like the Toyota 2ZZ and the Ford Zetec E.
It is also commonly seen in pure racing engines.
NEW! Dual scraper
now available for the B-series Honda engines -- works on both the
downstroke and upstroke.
B-series dual scraper with internal baffles (please specify
engine): $134.95
TeflonŽ bladed version: $234.95
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.
This picture below shows an example of screening added to the
interior of a B-series engine tray without a girdle. This tray
is also for a TeflonŽ scraper and so it illustrates 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:
Modified windage trays:
Honda B16-B18 series without girdle: steel scraper version
$109.95; TeflonŽ bladed scraper version $159.95 (includes clearancing
the tray). 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.
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.
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 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 Dart block -- the casting is somewhat different internally.
TeflonŽ scrapers are available for
the B-series engines (see above pictures).
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