Toyota GR86 2.4-D Carbon Intake System
Fully Sealed Pre Preg Carbon Fiber High Flow Intake System
+10-12 HP @ 6000rpm | +10 lb.ft @ 3000rpm
Development Process
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.
