Mantic: Installation Instructions for Mantic Clutch Kits – Racing Applications Part 3

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Release Bearing Installation:

Calculate the distance from the installed clutch diaphragm finger tip to the mounting base of the release bearing.
Measure the fully compressed height of the release mechanism.
The measurement in 1. Must be 4 to 6mm more than the measurement in 2. (This is to allow for wear of the friction material i.e. as the clutch disc(s) wear the diaphragm finger height increases). If it is more than 6mm, spacers must be placed under the CSC, or adjust the throwout mechanism to achieve this measurement. If it is less than 4mm, a CSC that is shorter or increase your bell housing length with a spacer.
The bearing travel must be within the maximum and minimum figures shown in the table below. If the travel is higher than the maximum the diaphragm can be over stroked and cause non release or damage the diaphragm. If the travel is below the minimum the clutch will not release fully making shifting gears difficult or not possible.

Clutch height / release load Specifications

Clutch type	Release Load (Max)	Diaphragm finger height (compressed)	Overall Height	Cover to Flywheel bolt torque
	lbs/kg	in/mm	in/mm	lb.ft / Nm
9000 2 disc	419lbs/190kg	1.87in / 47.5mm	2.44in / 62.0mm	24 ft lb / 33Nm
7000 3 disc	595lbs/270kg	1.46in / 37.0mm	2.09in / 53.0mm	24 ft lb / 33Nm
7000 2 disc	595lbs/270kg	1.14in / 29.0mm	1.77in / 45.0mm	24 ft lb / 33Nm
5000 3 disc	660lbs/300kg	1.57in / 40.0mm	2.19in / 55.5mm	24 ft lb / 33Nm
5000 2 disc	660lbs/300kg	1.15in / 29.1mm	1.85in / 47mm	24 ft lb / 33Nm
Height is measured from flywheel drive block mounting surface. Direct fit to most 5.5in / 7.25in flywheel bolt patterns. F/W must be modified Cover to flywheel bolts must be minimum grade #8. M8 x 1.25 or 5/16 UNF must be used. Refer to fitting instructions for custom F/W specifications

Bearing Contact Diameter and Travel Required

Mantic Kit type	Contact Face Type	Bearing Travel Max	Bearing Travel Min	Bearing Contact Diameter Max	Bearing Contact Diameter Min
9000 Racing Series (Cushioned discs)	Flat	11.5mm	11.0mm	68mm	47mm
9000 Racing Series (Non Cushioned discs)	Flat	7mm	5mm	68mm	47mm
7000 Series	Radial	7mm	5mm	50mm	46mm
5000 Series	Radial	7mm	5mm	42mm	38mm

Note: It may be necessary to use a pedal stop to prevent over stroking.

Flywheel Design Considerations:

When installing a Mantic kit that is not a “Direct Fit Kit” i.e. it does not come with a purpose fit flywheel, it is important that the Flywheel being made conforms to the dimensions in the sketch below as a minimum to ensure correct fitment.

NOTE: 5000 & 7000 Series clutches have 6 attachment bolts @ 600 (i.e. equally spaced) 9000 Series have 8 attachment bolts @ 450 (i.e. equally spaced).

NOTE: When modifying an existing flywheel to the above specifications, it is critical that there be sufficient strength remaining to maintain the structural integrity of the flywheel. Mantic accepts no responsibility for the subsequent failure of such a modified flywheel.

CLUTCH “BEDDING IN”:

Cerametallic clutches are a premium performance option. However, before exercising the ultimate performance of your new clutch, we strongly recommend that you allow the clutch to “Bed, or Wear In”. This allows the surfaces to mate with each other and give full contact of the friction surfaces.

This will ensure friction surface stability and longer lifespan of your new clutch, and allow the clutch to transmit torque to its maximum ability.

We recommend driving as much as realistically possible with frequent gear changing at light to moderate throttle settings, before utilizing the full performance of your vehicle. A test day would be ideal.

This procedure is also strongly recommended prior to having the vehicle dynamometer tested.

Failure to bed the clutch in may result in glazing of the material, causing shudder, slippage and noise during operation.