Australian Specialty Racecraft has over 25 years experience in racing fabrication and the design and manufacture of performance and competition oil pans.
We manufacture performance oil pans for other leading brands in Australia.
Since 2007, ASR has introduced their own range of oil pans for Street Performance, Competition and Marine Application. Custom built oil pans can be fabricated to your requirements.
To state the obvious, an engine will not survive long without adequate oil capacity/control. Most OEM engines are designed for RPM limits of 4000 to 5000, many engines not even getting close to these limits in everyday driving. At these levels the standard oil capacities are usually adequate.
The problems start when modifying engines for more performance, the obvious result is higher RPM capability. The standard OEM oil pans can be totally drained of oil as RPM limits increase.
A crank spinning at 6000 rpm is turning one hundred times each second. At that speed the crankpin in an engine with a 3.5 inch stroke will be traveling in a circle at almost twenty-eight metres a second. If you think about how fast that is you might start to get an idea of what happens to any oil sitting in the pan. The pan capacity, if not increased, is insufficient for the increased demand at higher RPM.
The main benefit of enlarging the lower section, from which the pick-up draws oil into the system, is to increase overall capacity. For a mild engine this is usually enough, but as engines move past these limits oil pans need more modifications to the internals to keep up with the engines demand.
The enlarged lower section of our oil pans.
The spinning crank generates severe air turbulence and pressure in the sump. Such turbulence, or windage, pushes down on the surface of the oil causing it to climb the sides of the pan. A windage tray between the spinning crank and the oil level helps avoid this problem by shielding the surface of the oil from severe windage pressure.
We punch Louvers into the windage tray to catch the oil coming off the crank and direct it back into the pick up area of the sump quicker. A combination of enlarged oil reservoir and windage tray is the basis for our S/S series oil pans. Most S/S pans also have a Crank scraper extending along the recovery side to prevent oil being pushed up the wall by windage.
The Multi-Louvered windage tray.
Uncontrolled oil has multiple problems. First, if it's not at the pick-up, it can't draw it into the system. Second, as it is flung off the crank and bounces off whatever part of the pan it hits, some is deflected onto the spinning crank where it creates drag. Third, the longer the oil stays in rotation, the more it aerates and collects more heat. You mightn't think that liquid could be that much of a problem, but the speeds mentioned before mean that there is quite a lot of this uncontrolled oil and the effects of it do add up.
Vertical Oil Control (V.O.C.) Baffles are a new added feature to our Street Comp oil pans. V.O.C. Baffles are placed in specific locations, acting as a barrier to help control oil movement in pick up area. Working in addition with the existing gates and mesh tray, the V.O.C baffles helps provide extra oil control under cornering, braking and acceleration.
The Vertical Oil Control Baffle. V.O.C
The Crank Scraper mentioned previously helps control some of this oil bouncing off the vertical walls and directs it back towards the pick up area. Another problem area is the windage tray itself. If it is a solid louvered windage tray, the solid area between the Louvers will also allow oil to deflect back on to the crank.
ASR fitted Crank Scraper.
The most efficient way to strip oil from the rotating assembly is to use a mesh style windage tray. This is best achieved by using a Uni-Directional Mesh. A Mesh tray allows the oil to pass through easily, but makes it extremely hard for it to come back through because of windage pressure.
The ASR Uni-Directional Mesh.
For extreme RPM cases, the solution for oil control at high RPM is to move the side wall of the pan away from the crank. Doing so creates a recovery section that catches the oil and allows the oil to recover quickly to the pick up area. In combination with the modifications mentioned so far, a kickout is perfect for extra oil control in high performance/RPM engines.
The movement of the car itself has an extreme effect on the oil around the pick-up. Braking, cornering, acceleration all force the oil away from the pick-up in different directions.
The idea is to control the oil around the pick-up. This is achieved by using trapdoor baffles or gates that can only swing in one direction - towards the pick-up. ASR positions gates in very specific locations depending on applications. For example, under hard braking any oil around the pick-up won't be able to flow forward because the front gates are closed by the G forces, and because the rear gates open towards the pick up, any oil at the rear of the pan will flow forward through and accumulate around the pick-up.
An ASR designed oil control gate box.
The benefits are obvious, a constant supply of oil available to the pick up during any maneuver no matter how sudden it may be. Another performance modification to oiling systems is the head of the pick-up. You'll notice the head of an ASR pick up is small compared to an OEM unit. The problem is the larger the head, the more likely it could become uncovered during use. Making it small increases the likelihood of keeping it immersed in the oil. It also limits cavitation problems.
An ASR Pick-Up head.
The main aim of these modifications is to ensure the engine safety, but some of these modifications have shown considerable horse power gains. We have seen dyno tests that have realized up to 20hp and a substantial temperature reduction over other versions of oil pans.
Our Super Street (S/S) Pan is our entry level performance oil pan. Increased capacity and a louvered windage tray. It is suitable for mild street cars.
308/5.0 ltr Holden Commodore - Super Street
Our Street Comp (S/C) is the step up from the Super Street. Increased capacity, gates are fitted and a mesh windage tray is fitted. The S/C comes with an ASR Fabricated pick up.
This pan provides good oil control for engines that may see the track on occasion.
308/5.0 ltr Holden Commodore - Street Comp
Our Engine Conversion Pans (E/C) are for car/engine combinations that are non-standard. Most cases the E/C will come with a ASR Fabricated Pick up.
Small Block Chev Commodore
Club Circuit/Comp Circuit
The Circuit range of pans includes the Club Circuit (C/L) and the Comp Circuit (C/C). These Oilpans are built for circuit race cars. These pans having Higher Oil volumes, Extensive internal modifications for oil control eg; Gates, Baffles etc. They have pick ups supplied that are located in the optimal location.
308/5.0 ltr Holden Commodore - Commodore Cup Curcuit Race Pan
The Drag Comp Pan (D/C) is designed specifically for Drag Racing. The internals and ear are designed with the accelerating G-force in mind, placing the pick up towards the rear and surrounding it with gate boxes and directional baffles, ensuring constant oil control. The D/C is the best option for a High Power, low ET Drag Race Car.
RB30 Nissan - VL - Drag Race Pan. (This pan with optional External Pick-up Modification.)
The Comp Speedway (C/S) is designed for single turn speedway cars. The Internals are different depending on whether you’re doing Left Hand or Right hand turns, Like the D/C the G-force is considered and the ear is built around that. Pick up is placed in the optimal location for best oil scavenge and surrounded by Gates and Baffles.
Small Block Chev - LH Turn Speedway Pan
Competition Marine (C/M) pans vary depending on the type of racing that the pan will get used for, whether it be Ski Racing, Circuit Racing, Drag Racing, Jet Sprint etc.
Custom Oil Pans
Custom oil pans can be fabricated to your requirements and specifications.
Please Contact/PM us for any enquirys &/or questions you may have.
PHONE (03) 8774 0343
FAX (03) 8772 2457
Factory 2 / 43 DINGLEY Ave
PO BOX 2293
firstname.lastname@example.org or alternateivly send a Private message to us on JC