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What a crank-scraper is and other technical info... Some comments on our products...
 
Alfa-Romeo, AMC, BMC, BMW, Buick, Buick-Rover, Cadillac, Chevrolet, Chrysler/Mopar, Datsun-Nissan, Fiat-Lancia, Ford, GM, Honda/Acura, IHC, Jaguar, Lotus, Mazda, Mercedes, MGA/MGB, Mitsubishi, Oldsmobile, Opel, Pontiac, Porsche, Renault, Suzuki-Geo, Toyota, Triumph, VW, Volvo

 

 

We will try to keep this list updated but if you do not see your engine listed here please ask!  We can  do custom stroker or knife-edge crank designs.  We can provide plastic templates for initial fitting and adjustment.

 

We have included some representative pictures of the scrapers we make.  If you would like to see a picture of a particular scraper please ask -- we would be more than happy to send one through.

 

Our standard scrapers cost only $59.95 unless noted.  When available (please enquire) our zero-clearance TeflonŽ scrapers run an additional $100.00 to the cost of the standard steel scraper unless noted.

 

Remember, your vehicle may have an engine made by a different manufacturer so check both product lines.  If you are still unsure, please contact us.

 

Honda/Acura

 

 

 

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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Copyright 2002-2010 All rights are reserved on our product designs -- a great deal of hard work goes into each one.

TeflonŽ is a registered trade mark of E.I. du Pont de Nemours and Company. Only DuPont makes TeflonŽ resin sourced by Ishihara-Johnson Crank Scrapers from authorized DuPont licensees.

We Ship World Wide!

 

 

If you are in need of a dry sump system we suggest you contact Armstrong Race Engineering.  They provide top quality components and many times our scrapers can be used in combination with their pans.

 

They make top quality parts.

 

 

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Jean-Claude 1919-2003
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