Overview
The latest Honda Civic Type-R FL5 is a highly potent sports car which is a huge amount of fun to drive with a formidable 325hp and 310 lb.ft torque.
However, it does lack something and this is evidence from just hearing the engine under normal driving and looking under the engine bay. The intake has a convoluted air path and small opening for air.
We took a radical approach to the design using a large expanding tube with integrated MAF housing feeding into a completely redesigned airbox with significantly larger volume and a 80% enlarged opening.
Our signature double cone large surface area air filter is used with it's 175mm opening. This is housed in the air filter housing and the system is clamped together.
In addition to the intake system we have also developed a stand alone turbo inlet tube which increases volume and has a smoother radius into the turbo reducing turbulence.
Development Process
During the development process we created multiple prototypes and models.
The OEM system has a small opening and uses a standard panel filter with a small cross sectional area with a simple tube.
We decided to create a system which followed the same path but with significantly enalrged air opening, add our signature large venturi tube mating to a vastly larger volume airbox.
Doubling the cross sectional area of the front inlet feed giving more a more than adequate increase on available air
After some iterations this method gave the best air flow under CFD analysis showing less turbulence than the OEM system with vastly increased airflow.
The results on both the dyno (see below) and road driving were excellent. Vastly improved throttle response, low end torque response improvements
Under normal but spirited driving the engine feels even more eager to accelerate at every rpm wether under partial load or full load.
Air Intake Temperatures & Heat Soak
Intake temperatures were tested on the stock intake system by placing thermocouples before the air filter on both the OEM and Infinity systems.The OEM system manages ambient temperatures as low as 20mph and immediately under full load. Under full load high rpm acceleration the ambient temperatures remains at ambient. In terms of temperature, the OEM system sets the benchmark. The infinity Intake matches the OEM intake.
Air Filtration
Within the beautifully shaped carbon shaped enclosures sits our bespoke short stack high surface area filter larger than any cone filter design currently on offer on the market with a huge opening of 170mm (6 3/4″) and is designed to take full advantage of the intake tubes by altering the direction of the airflow towards the outer walls.
By placing the air filters in front of the inlet tube we achieve the largest velocity stack ever seen for the FA24 engine and which also has the best laminar flow. It is important to note that we have painstakingly opted for the largest possible air filter for a various number of reasons. Not only does a larger air filter allow for more air flow and therefore power but it also does not block up for longer and continues to be efficient at it’s main purpose which is to filter the air of harmful elements.
Dyno Testing - +17-24HP
Dyno tests were performed under strict controlled conditions on an independent Maha MSR500 dynamometer in order to show a true and realistic result.
The stock car made almost exactly what the manufacturer quotes with 330 BHP with a perfect and natural power curve.
After fitting our intake system 347 BHP was achieved.
A significant and clear gains of 17 BHP.
From 2500-7000rpm the torque and power increases consistently through the rpm range
At 5500rpm the engine gains significant HP and torque.
Run down losses remains identical between the two tests as did the ambient temperature.
Both sets of tests were carried out with identical starting oil and coolant temperatures.
Dyno Line Key:
Dotted Red Line / Solid Red Line – Flywheel Calculated HP (wheel + loss) with Infinity Intake
Dotted Red Line / Dotted Yellow Line – Flywheel Calculated (wheel + loss) HP Stock Intake
Specifications
1 x Inlet Tube with integrated CNC MAF Boss
1 x Large Air Filter Housing / Inlet Duct
1 x Bespoke Infinity Design Air Filter
1 x black metal clamps
1 x EPDM Flexi hoses with clamps
1 x Bracket
1 x Fitting Kit
