CSF A90/91 Supra Charge-Air Cooler Manifold

You asked, CSF listened – All the Features You Need to Push the Limits

Several months ago, during the final design stage of CSF’s new manifold, owner of CSF, Ravi Dolwani, hopped on a plane to Texas to attend the TX2K drag race invitational. Included at this year’s event was an A90 Supra class. Ravi went to speak with Supra owners and find out what they wanted out of an upgraded performance manifold. He came back to CSF following the race weekend, and worked with long time design partner and CSF customer, VF Engineering, to implement a host of features that took the performance benefits and capabilities of the new CSF manifold to an even higher, industry-leading level.

Individual Nitrous / Methanol Injector Ports

On the outlet tank, each cylinder runner has a 1/8^th NPT port which can be used for nitrous or methanol injection (a popular power modification on the B58 engine). The CSF manifold allows for maximum spray control and even spray distribution throughout the engine. A nitrous system set-up specifically for the CSF manifold will be coming soon from industry leaders Nitrous Express.

A handful of cars at TX2K had blown their engines due to the way their nitrous systems were plugged into their vehicles. With the OEM plastic manifold, a single spray system is most commonly used as threading into plastic to insert an injector node is already very difficult to install properly. The single fogger system, more often than not, will create unequal distribution of spray in the engine, either giving some cylinders too much or too little spray. This will increase the chance of severely damaging the engine.

Top Feed Port Injection with Included Fuel Rail

An extruded fuel rail is included with the CSF manifold. It can be attached to the outlet side of the manifold. The AN-8 fuel rail comes with feed and return -8 internal hex plug fittings from Radium Engineering for a plug and play installation.

• Fuel rail aperture for each cylinder is an optimized 7mm opening for compatibility with most commonly used high performance injectors
• CSF recommends using Injector Dynamics (ID) injectors for the best performance – the most commonly used injector for this engine has been ID model # 1050.34.14.14.6 (qty 6)
• Anodized CNC machined injector hats (qty 6) are included in the supplied hardware kit to accommodate short height injectors aka “shorties”

Vacuum and Parameter Pad

On the side of the manifold inlet, CSF has included a 3 port pad into the machining of the tank. This can be used to measure additional parameters or as an additional vacuum source. These three 1/8^th NPT ports can be plugged with the included hardware kit if they are not used.

Easy Access to Spin-Off Oil Filter With Counter Balanced Design

Imagine having to remove your manifold every time you wanted to change your oil, especially if your vehicle is used in motorsports where oil changes occur more often. CSF thought of its customer base during the design phase and have incorporated a recessed design towards the back of the manifold that for allows easy access to the spin-off oil filter. A counter balanced design protrusion above the recess was simulated in SolidWorks CFD software to ensure smooth air delivery into the rear of the core for the best possible cooling effect.

Air Inlet Divider

Another exclusive feature of the CSF manifold is the inclusion of an air divider welded into the inlet side tank of the manifold. With the length of the design, the engineers at VF Engineering wanted to make sure that the volume and velocity of air received to the back of the manifold to cylinder areas four, five, and six would be equal to the airflow passed through the front half of the manifold for cylinders one, two, and three. After extensive simulations in SolidWorks CFD software, an air divider was added to the design to ensure the best possible and equal cooling performance to each cylinder of the engine.

CFD analysis in SolidWorks during the R&D phase of the design

Breather Ports for Inlet/Outlet of Water Tanks

Two 1/8^th NPT ports are located on the top of the back water plate. These can be used to measure inlet/outlet water temps as well as used as breather ports to help in the bleeding procedure to ensure all air has been cleared from the water system. 1/8^th NPT plugs come included in the supplied hardware kit. Please follow OEM BMW or Toyota bleeding procedure which takes roughly 15 minutes to complete.

Hardware Kit, Well Thought-Out Instruction Manual & The Ability to Install OEM and OEM-Style Engine Covers

Included in the supplied hardware kit is several brackets, bolts, washers, and mounting posts to be able to install the OEM and OEM-style engine covers. This is an industry-exclusive feature to the CSF x VF Engineering design, and was extremely difficult to not only engineer, but to manufacture as well. An array of items come vacuum packaged with corresponding letters listed on an easy to use Bill-of-Materials List (BOM) along with exploded diagrams and a simple order of operation procedure list to follow for installation. Made with racers and DIY enthusiasts in mind.