The F-CAM for NB8C Dual Purpose for NA8C

The F-CAM line with high cam lobes for NB8C before M/C models is also available for MIATA NA8C.

NA8C model with Hydraulic Lash Adjuster (HLA) system could have HLA noise over a long period of operation, while F-cam for NB8C before M/C with its 10.0 mm high lift takes advantages at higher engine revolutions because of the shim under bucket (SUB) system maintaining stable performance at higher rpms.
Therefore, it expects that your NA8C BP motor power will be increased by replacing your camshafts to Maruha's F-CAM for NB8C.

The F-CAM for NB8C features its high cam lobe that provides your MIATA with the improvement of torque and engine both in street and sports driving.
In addition to this, SUB without dropping from the valve lift keeps the superb performance even in higher engine speeds.

However, Maruha's F-cam for NB8C has a larger rotating diameter than the MIATA stock cam for NA8C (Picture 1 & 2).
Installing the F-CAM for NB8C into your NA8C model could have a chance of interference to the valve lifter hole.

In order to prevent the damages, it is necessary to measure the clearance between the top of your MIATA's cam lobe and the engine head.
The gap more than 1.0 mm means free from interference but under 1.0 mm, it would need to shave the surface of engine head for adjustment.

(Picture 1) Cross-sections of the genuine MIATA camshaft for NA8C
Left: Intake side (total lift: 8.1 mm/ rotating diameter: 52.2 mm)
Right: Exhaust side (total lift: 8.6 mm/ rotating diameter: 53.2 mm)

(Picture 2) Cross-section of the F-CAM for NB8C
Intake & Exhaust sides (total lift: 10.0 mm/ rotating diameter: 53.0 mm)

The F-CAM's valve lifters and SUB for NB8C are suitable to fix onto MIATA NA8C in order to reduce the weights of your valve lift system.
On another front, upgrading your car performance with lower cost will be fully achieved by converting the HLA to a lash killer that is replaced the plunger inside the HLA body to an adjusting collar for gap (Picture 3).
It can be performed as SUB.

(Picture 3) Converting to a lash killer means that a plunger inside HLA is replaced by an adjusting collar for gap, Clearance Collar, depicted in gray.

Clearance Collar size available from 11.00mm to 13.00mm ( every 0.05mm )

[NOTE]
The product should be installed by a professional.

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