EP Racing Crankscraper/Windage Kits

is proud to introduce a new innovative product that will help aid in reducing windage in the crankcase of your VG30DETT. Parasitic draw is one of the leading causes in loss of HP and TQ production when building a high output engine. The most common form of this is windage.

Windage is defined as:

During normal engine operation a significant amount of oil adheres to or becomes entrained in a cloud surrounding the spinning bottom end.



This oil eats up horsepower your engine is making by increasing the rotating mass and also creating parasitic drag. A crank scraper mechanically strips off excess oil by coming close to, but not touching*, the moving crankshaft and rods. It also interferes with the pressure differential that draws oil into the so-called windage cloud.



EP Racing crank scrapers have been proprietorially made to the specifications suggested and are constructed from steel unless noted and include installation instructions. The scrapers are installed in a variety of positions but generally between the oil pan and engine block or along the main bearing caps. Some fitting to your individual engine may be required and the procedure for carefully checking this is explained in the installation instructions.


So...some of you are wondering do these kits work and are they functional for any platform...the answer is yes they are...and here is why.

Crank scrapers in various forms have been in use in stock passenger car engines for at least 45 years! More importantly, they are currently in use in a variety of OEM engines of both large and small displacement -- from relatively low RPM V8 engines to high RPM straight fours. Most auto enthusiasts are surprised to learn just how common they really are. In short, it is an extremely well-proven technology that is often simply not recognized. The modern trend is to have many more oil control devices in engines. Crank scraper technology is OEM equipment on various modern engines from Nissan, BMW, Chrysler, Ford, Mazda, Honda, Toyota, VW, Porsche, GM, Pontiac, Chevrolet, Mitsubishi, Mercedes and many other manufacturers.


General Q&A: What is windage and what are the differences between an oil baffle versus a windage tray versus a crank scraper?

Windage:
During normal engine operation a significant amount of oil adheres to or becomes entrained in a cloud surrounding the spinning bottom end. This oil eats up horsepower your engine is making by increasing the rotating mass and also creating parasitic drag. Windage is actually a highly complex set of phenomena. Windage effects increase with: vehicle movement; rpm; stroke; blow-by (atmospheric pressure); bearing clearance; component surface characteristics, oil squirters (there are many types); draining oil from the head, cams, balance shafts and other internal components as well as oil returns from turbos, air-oil separators and catch can drains. Closely related topics are those of pumping losses, crank case ventilation, NVH (noise, vibration, harshness), oil aeration and the cooling function that is required of oil in addition to its lubrication tasks.

There are a number of different types and degrees of oil aeration starting from the baseline solubility of air in a given oil formulation at a given pressure and temperature (about 9% in a paraffinic base at saturation at one bar and 100 degrees C) and progressing through to actual foaming of the oil into a shaving cream like mix. Oil aeration can cause innumerable problems but some common ones are bearing failure, lifter collapse, oil pump failure and over heating and subsequent destruction of oils (and engines).

Baffles, windage trays and scrapers:
An oil baffle is a physical barrier to oil movement that is generally all or partially submerged in the wet sump oil reservoir. Sometimes small fins in other areas of the pan floor or engine can be seen that guide draining oil back to the main sump reservoir and these can be considered oil baffles as well. Typically these are seen in OEM cast aluminum sumps. The idea is to keep the end of the pump pickup tube constantly submerged in oil so that it does not suck in air. Some baffles include trap doors that swing and close to enhance this function. So, baffles are ultimately intended to guide fluid consolidated oil to, and keep it around, the oil pump pickup.

A windage tray should prevent fluid reservoir oil that is sloshing from coming into direct physical contact with the rotating bottom end. Windage trays are also meant to shield the reservoir oil from the aerodynamic forces of the rotating assembly. These two basic functions often are in direct conflict with one-another with respect to decreasing the total effects of windage.

A crank scraper (sometimes known as an oil wiper, etc.) is a broad term for technology that actively strips away oil entrained in the air around, as well as oil physically adhering to, the rotating bottom end. Crank scrapers also serve to disrupt the pressure differential that forms in and around the rotating assembly.

Baffles, windage trays and crank scrapers all serve related functions and all can be of mixed design, i.e. dual or even triple purpose. Remember that different OEMs and cultures often use ideosyncratic terms for these various devices so this is only a general guide.


So now you've read up on the specifics of what windage is and why it's such a common cause of performance loss, I'd like to introduce the two version of windage/crankscraper kits available for the Z community.

EP Racing Street Windage/Crankscraper Kit

This kit is well suited for the average owner who is rebuilding their engine and wants the added protection and performance out of their engine. This kit comes complete with both crank scraper (1) and Windage Screen (2). This kit is designed for the stock oil pan as a direct bolt on application. Some minor fitment alterations may be needed. An instruction manual will be provided to aid you in the installation of this item.

(1)



(2)







EP Racing Race Windage/Crankscraper Kit

This kit is well suited for the more serious performance addict owner who is rebuilding their engine and demands the added protection and performance out of their engine they are looking for. This kit comes complete with both crank scraper (1) and Windage Screen (2). This kit is designed for the stock oil pan. **NOTE** - This windage/crankscraper kit requires modification of the stock oil pan. I offer services on modifying the stock oil pan for $125. This is a 100% in house alteration designed to work specifically for this Race Windage/Crankscraper Kit. Some minor fitment alterations may be needed. An instruction manual will be provided to aid you in the installation of this item.

(1)



(2)





Pricing:

EP Racing Street Windage/Crankscraper Kit - $94.99 + SHIPPING

EP Racing Race Windage/Crankscraper Kit - $109.99 + SHIPPING

**NOTE**- (Race Windage Kit) This windage/crankscraper kit requires modification of the stock oil pan. I offer services on modifying the stock oil pan for $125. This is a 100% in house alteration designed to work specifically for this Race Windage/Crankscraper Kit.

Acceptable forms of payment are Money Orders or Paypal. When using paypal, users fees do apply. (3%)

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Hello,

The only difference I can pick is the extra screen on the "race" product. Is this the case?

Also, can you elaborate on what modifications are required to fit the race product?

Thanks!

Ben

 

some questions

1. how long have you had these on the market and how many have you roughly sold?

2. what is the feedback you have received from buyers

3. has anyone came back with any faults? i.e the screens come out or fallen out etc??? any welding broken etc?

4. what is your warranty? do you cover against product default and worse if this product actually broke welds or the mesh screen came loose and contactedd with the crank etc etc do you warrant against this. (god knows what kind of damage can be made)

5. do you have pictures or information on what you mean by slight modification. what have you needed to modify slightly on both street and race spec applications?

6. what is shipping to VICTORIA 3175

thanx

 

Hello,

Yes the street version doesn't have the rear baffle screen like the race version. The street version allows you to keep your stock oil pan as is with no modifications needed. The race version requires you to modify the back left corner of the oil pan to fit the rear screen in flush with the pan wall.

If you have any further questions please feel free to email me.

 

Hello,

I've had this product out on the market for nearly a year now. I've sold quite a few of them when they first came out and since I showed them off at ZCON 09 here in the US.

All my buyers really like the product and have stated its a well made product.

No faults of any type have come back. The product is welded in several strategic areas to ensure nothing comes apart.

Like any product this is a race engineered part. It only comes with a defect warranty meaning if the part doesn't work or fails due to a fault by me I will replace the part. I can not warranty an engine since I haven't installed that particular part on your engine. That would result in the buyer looking over the part to ensure there are no issues with it prior to installing it and ensuring once its installed that it was done so correctly. These are racing parts that are intended for off road use only. But I've never had one fail on me yet so you can have piece of mind on that.

If you would like more information regarding the modification needed to be made to the oil pan feel free to email me.

Shipping runs approx. $20 to Victoria

 

is that shipping to AUSTRALIA, VICTORIA ?

thanx

 

yea...the package isn't very big and is quite lite. This is based on USPS flat rate shipping pricing.

 

have you got an idea what actual performance gain there is from the race screen ?

 

the overall performance gain is reduction in windage that will increase HP. With turbo engines I can't say how much because every engine is running a different setup of turbos and pressures....but if I had to give you a number I'd say a 10-12% increase in HP. Doesn't seem much when you look at numbers but when you see benefit of the engine when having this item installed it makes a big difference.

 

10% is a HUGE gain! Specially for the cost

 

To an extent but do realize that these percentages aren't WHP...they are brake HP. Overall thought the performance for the dollar is quite good.

 

how long are these available for? do you only have a certain amount to sell or are these always in production...

thanx

 

this is a item that is part of my product line up that I've developed. I hope to have my site up and running for all the parts I make soon.

 

Well for that cost I think I will dip my toe in for a RACE screen.

What are the mods to the sump? can you send me a PDF of what needs to be done?

Also are these easy to fit cause I wont pull the engine out again. Just drop the cross member and fit it from underneath.

details please?

 

also interested. and could you please send me what you send tektrader. undecided whether i go street/race.

 

Thirded!

Any further info would be very appreciated.

Cheers
Ben

 

Robby i'm not modifying your sump so get the street one!

 

That should be enough for you gents to understand

 

Is this an optical illusion or is that actually open to the outside of the sump?

 

illusion...at that point its cut at a 90 degree. You can see in the other images the flat underside.