ProOPR Rising Rate Turbo Oil Pressure Regulator (Twin Outlet)
$222.17USD (Excl. Sales Tax)
Turbosmart ProOPR is a rising rate oil pressure regulator for your turbocharger. The ProOPR is boost referenced, not unlike your fuel pressure regulator and allows lower oil pressure at lower boost pressures and increases oil supply pressure to the bearing system at higher boost levels. This is designed for large turbocharger systems and high boost levels where the additional pressure and confidence is required at high boost, high shaft speed and horsepower levels.
The twin outlet system also creates a ‘T’ in your turbocharger oil supply line for simplicity of plumbing and connection for up to 2 turbochargers and while it is returnless, inline design it uses a boost reference to create a pressure differential. This pressure differential targets appropriate bearing pressure at low and zero boost pressure to eliminate your turbocharger digesting oil, while also providing increased oil pressure at higher boost levels to provide increased protection and confidence.
Fixed, non referenced: Turbosmart OPR V2
Rising Rate, Single Outlet Pro OPR
Aluminum (6262 T6) anodised body and valve
1 x ⅛ NPT sensor / gauge port
1 x ⅛ NPT boost reference port
1 x 4AN Inlet
2 x ⅛ NPT regulated oil outlets
Inline, return-less design
Suitable for all engine oils
Australian Designed and Manufactured
Patent Pending Innocated Design
Notes: This solution is designed for large turbocharger systems and high boost levels as found in Pro-Mod and other similar forms of Motorsport where large frame turbochargers and high boost levels are in use.
It is the responsibility of Turbosmart to warn its customers and employees that some products sold on this website contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.
This product does not have a CARB EO #; it is not legal for sale or use in CA on pollution controlled motor vehicles. This is intended as a "Race Only" product to be used solely for competition. It's use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization; any other use including recreational off-road use, may be a violation of local, state and federal laws. It is the buyer's responsibility to verify legal use of this product for the intended application and use.
1 x OPR Oil Pressure Regulator
2 x 1/8 NPT Blanking Plugs
The Turbosmart OPR range is a patented system of regulating the oil supply to your turbocharger to ensure the right amount of oil is delivered to the bearing system. Turbocharger bearing systems require oil at pressure in order to lubricate the bearings of the main, balanced assembly and the OPR range has been developed to take the guesswork out of getting the target oil pressure right.
Why reduce or modify the oil pressure at all?
There are 2 main reasons you will want to look closer at the oil pressure feeding your turbocharger.
1. Unlike some presume, oil is not simply forced in and then forced out the other side into the oil return. The inside of a bearing housing is more like an engine's crankcase. Oil is forced in, through the bearing but it is then simply left in the sump and needs to be given a good reason to leave. Some of this is engineered into the housing and gravity helps with the rest. But it is not forced. If you have more volume than your design and gravity can handle, you end up with oil pooling in the assembly and can overcome the oil management system within the assembly and enter into either the compressor or turbine covers. A symptom of this issue is oil traces in your compressor and charge pipes , or unexplained oil smoking from your exhaust.
2. Even if your turbocharger oil return is in good shape, there are two dynamic seals on your turbine shaft, one at each end near the housings and each of these forming part of the oil management. At low shaft speeds (also, low boost) these systems are generally less efficient and less able to effectively seal. The symptoms can be the same as pooling and overflow, but the cause is different. You simply have too much oil pressure at low shaft speeds.
Why would you use a rising rate regulator?
It’s not for everyone - In fact, the OPR V2 inline regulator is for the greater majority of performance enthusiasts and racers as this isn’t rising rate, isn’t boost referenced and constantly targets and oil pressure of around 40 psi which is the sweet spot for the virtually all modern ball bearing turbochargers! The new ProOPR however comes in handy when you are feeding huge turbos and running an even bigger boost. By using a boost-reference rising rate system were able to effectively provide a slightly lower base pressure at lower boost pressures and ramp the oil supply up inline with the boost pressures the turbocharger is making. This provides protection and confidence under the extreme conditions of big horsepower drag racing applications while not compromising cold start and low boost performance which can impact bearing system efficiency and reduce spool and transient response and in some turbocharger designs, allow oil overcome the oil control systems and enter into either the turbine or compressor circuits of the car.
There is a filter included?
Yes, like the OPR V2, the ProOPR includes a built-in, serviceable and replaceable oil filter to further protect your valuable turbocharger. The 44um Stainless Steel Mesh filter is specified to ensure protection for your turbocharger, while not impacting the filtration balance of the engine and existing ‘motor-oil’ filter. These filters can be cleaned and refitted and are also available separately as a complete replacement element.
What Oil Pressure Will it deliver?
This will depend slightly on if you have one, or two turbochargers plumbed into it. Note, that unlike our OPR V2 which has a fixed target of around 40 psi, the Pro OPR are rising rate and ‘start’ at a lower pressure. At or under zero boost you can expect around 15-18 psi which should then show a rising rate of 0.6-0.7:1 when compared to your boost reference, until maximum oil pressure, or maximum boost is achieved - Whichever occurs first. The regulator of course cannot up-regulate, only down-regulate.
Where should I get the reference signal from?
You have to pick up your boost reference from the turbocharger compressor cover, or charge pipe near to it. Do not use a reference from the intake manifold for example as this can potentially provide a vacuum reference to the regulator & this will further reduce your regulated oil pressure.