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1ZZ or 2ZZ scraper
The design has multiple scrapers and directional screening. Two principal angled scrapers both remove the oil and impart a vector with guidance towards the sump well. This is so oil can be transported across the engine in opposition to the g-forces trying to make it pool up into bays 3-4 -- the weak point of the OE wetsump design at sustained 1G+. * The pickup as seen below has two 3mm spacers under the strut and base which are included with the kit (spacers are discussed below).
* This technique is not pulled from the thin air. Ford, Porsche, Nissan and Mercedes engineers have all employed it in sump designs. Here are a couple pictures of it employed in the modern Ford Cobra 4.6 pan:
If you choose to use the 1ZZ pan in lieu of the 2ZZ pan or aftermarket designs, it needs some slight relief at the windage tray baffle due to the 2ZZ pickup being shifted over and of greater outer diameter. Always check pickup to pan floor clearances when using a pan for a different engine series -- just a common sense rule of thumb. Ideally the clearance will be .25" (6.4mm) to .375" (9.5mm)*. If you are using the stock 2ZZ pan, the OE windage tray is eliminated with use of this scraper kit.
* The source of this recommendation is Ford Motorsports and was published in 2006 on page 34 of their 25th anniversary catalog.
This is the current version of the 2ZZ scraper (1ZZ visually very similar):
Why Do We Make Modified Windage Tray Inserts?
The reason we make the screened inserts for the flat-windage tray pans goes back to careful dyno data obtained by the late Ed Peters, a retired Dodge failure analysis engineer who was doing testing for Chrysler Corporate. A pan he was evaluating was a one-off made for him by a well-known firm with a smooth tray insert and he found the oil temperature rose over the stock pan, which is not desirable. He asked us to make a directional screened insert for it and with this change alone, the oil temperature was lowered. When Ed worked on an earlier oiling issue experienced by racers of 2.2 Shelby vehicles, he performed joint research with Mobil Oil and a directional screening insert was part of the solution.
When oil droplets make high speed impacts with smooth surfaces a number of smaller droplets rebound. That is important because smaller droplets will populate the windage cloud and friction results when the rotating assembly passes through this cloud at high speed. The friction raises the oil temperature.
Regarding Moroso alloy pans...
There are many people who have purchased the excellent Moroso alloy pan for the 1ZZ or 2ZZ engine. We make a modified windage tray insert with suspended directional screening for use in this product. It can be used with or without our scraper but of course we suggest using the scraper as well. Insert price: $154.95 Note that there are two versions of the tray insert depending on which version of Moroso pan you have.
This first version A is a pan manufactured by Moroso exclusively for Monkey Wrench Racing
Some pictures of the insert version A (sitting over our scraper):
Version B is for another Moroso pan for the ZZ engines:
Moroso tray version B Insert
There is a version of the windage insert for the Inokinetic Gpan3:
A 2ZZ customer recently installed the spacer kit with his Gpan3 and found that the two spacers combined yielded 7mm of clearance. He also has the scraper kit installed.
There is a version of the windage insert for the BOE pan:
1ZZ or 2ZZ pickup depth adjustment kit
Why would I want to do this?
For a pickup to operate optimally, Ford Motorsports recommends .25" to .375" clearance from the pickup opening to the floor of the pan. Less than this can cause cavitation and loss of oil pressure and more than this can make it more likely that your pickup will ingest air during certain severe driving maneuvers. In mm those measurements are 6.4 to 9.5.
In checking the height of the pickup opening from the floor of the pan we noted that, for example, the 2ZZ pickup was 11.5mm up from the 2ZZ pan floor we had here and 13.5mm from the 1ZZ pan floor that we purchased new from the dealer and this was not including any thickness at all for gasket material. Important! It has been established that Toyota has used different stampings over the years for the 1ZZ and 2ZZ pan so this is something you need to check out on a case by case basis.
This kit consists of 2 sets of spacers for the pickup mounting flange and the strut which supports it. The spacers are 3mm thick so you can increase the depth by 3mm or 6mm total. A set of bolts is included. Clay is included to check the depth of the pickup. Full instructions with pictures will be sent to you.
What you will need to have: Tools to drain, remove and clean the pan, oil pickup and fasteners. A tube of high quality RTV silicone gasket maker. A single edge razor blade or X-acto knife. A ruler. We recommend obtaining OEM factory oil pump flange gaskets -- you could need as many as three but RTV can be used if you are careful. In case you need the part number for the 2ZZ gasket it is: 15149-88600.
Why is the pickup higher in the pan to begin with?
We believe that Toyota does this to help protect the average driver from him- or herself. Many times people will hit large objects in the road, jump curbs and so forth without a second thought to possible damage, dents and so on, that could occur. If it keeps running it must be fine, right? We are presuming that the people that use this kit are those who would always carefully inspect the undercarriage and pan for damage following such an incident, just as any serious racing crew would. If your pan is dented you should remove and repair or replace it. The nice thing about this kit is that it will allow you to first establish the existing depth and then to check it later on should road damage occur. There was also a period of time when oil sludge formation was a world-wide problem. By raising the pickup opening height it would logically make it less likely that this sludge would be ingested by the engine and harm bearings.
We have not found a reference explicitly stating this as an element of a Toyota design manual however we do not pull the belief from thin air -- if you take the time to check the height of the Toyota 4A engine series pickup opening, it is located within an open hemispherical mesh bulb at a substantial height off the pan floor. The height recommendation by Ford came six years following the publication of SAE 2000-01-0671 [Development of the High Speed 2ZZ-GE Engine
Takasuke Shikida, Yoshikatsu Nakamura, Tamio Nakakubo and Hiroyuki Kawase of Toyota Motor Corp.] We surmise the issue with sludge formation was curtailed in the interim by tribology and oil engineers.