The OEM system bends towards the right hand side of the engine bay with the air filter inline with the air feed giving the most direct path for the air to flow.

Infinity Designs decided to create a system which followed the same path with the single feed but with the following major changes:
 

1. Double the cross sectional area of the front inlet feed giving more a more than adequate increase on available air for the FA24
2. Extend the snorkel towards the front and incorporate a bell mouth to smooth the air flow
3. Use a significantly larger air filter housing and the largest possible venturi inlet tube.

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 with all of the hesitation now absent.  At mid-higher rpm heavy load driving a clear gain in performance noticed.
Under normal but spirited driving the engine feels even more eager to accelerate in the 2000-4000rpm range required with more torque.

Installed on GR86

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.WIth the Infinity intake fitted without the front snorkel intake temps are consistently + 5-10 degC higher than OEM.  With the snorkel fitted, the air air is being taken from the exact same area as OEM and therefore the Infinity system matches the OEM efficiency.

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 - +10-12HP  |  +5-10lb.ft

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 228 BHP and 179 lb.ft torque with a perfect power curve.

After fitting our intake system the peak power went to 240 BHP  and 184 lb.ft torque.

A significant and clear gains of 12 BHP and 5 lb.ft torque peak.

From 2000-3000rpm a torque increase of 10 lb.ft was gained which is a significant gain.

From 6000rpm onwards the FA24 engine gains significant HP and torque to the red line.

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:

Solid Blue line / Dotted Blue Line – WHEEL HP
Solid Green Line / Dotted Green Line – Drivetrain Loss
Solid Red Line / Dotted Red Line – Flywheel Calculated HP (wheel + loss)
Solid Yellow Line /  Dotted Yellow Line – Flywheel Calculated Torque