INFINITY DESIGN CARBON INTAKE SYSTEM FOR TOYOTA GR86 2.4-D
Fully sealed Pre Preg Carbon Fibre High Flow Intake system
+12-14hp @6000rpm | +10 lb.ft@3000rp
During the development process we created multiple prototypes. The initial prototype used a straight venturi tube feeding into a large airbox which took it’s air from the stock OEM area with an enlarged area with an additional air feed on the opposite side which is very small.
The idea was that the additional air feed would help in increasing available airflow. However this design failed to give the desired results both on the dyno testing and on the road with no difference in power. CFD analysis showed vast amounts of turbulence in front of the air filter.
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.
We 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.
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