CAT CAMS 2280378 tarmac rally – race Ford TL20H Pinto I-4cyl 2.0L 8v SOHC (RP/RP)

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For ‘conventional’ applications where pricing is important , Cat Cams offers a vast range of high quality chilled cast iron camshafts. Typical applications are fast road and moderate competition camshafts. Development of a casting requires high production volumes, so these are only available for a limited number of big volume applications.

When castings are not (yet) available, the steel billet production line at Cat Cams brings the answer: the development cycle for the BMW Mini R56 Turbo engine was about 6 weeks from arrival of the sample parts. The work included design and manufacturing of steel billet camshafts (see picture below), cam profile design and development of a dual valve spring kit.

For more demanding applications such as dedicated competition projects, the steel billet production line gets in action as well. Beside casting availability, there are some other reasons to prefer steel billet camshafts: gun drilling a 20mm hole over a length of 400mm saves about 1kg. Thanks to this reduction, the weight of Cat Cams steel billets rivals assembled hollow lightweight camshafts. However, the advantage of these ‘single piece’ steel billets is an important improvement in stiffness and strength, allowing higher acceleration cam profiles.

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tarmac rally – race
Ford TL20H Pinto
I-4cyl 2.0L 8v SOHC (RP/RP)
#steel billet camshafts
#FOR COMPETITION APPLICATIONS ONLY. Following details must be verified:
the camshafs must turn smooth in the cylinderhead, provide free travel by machining where needed
distance between valve seal and retainer at full lift must be 0.6mm at least
minimum valve spring travel of 1.0mm at full lift must be provided
distance between valve and piston 1.0mm (pref. 1.5mm). check 5-15° before TDC on exhaust, and after TDC on intake
#ONLY for use in competition engines with independent engine management (throttle position sensor) or carburettors
#springs can be fitted directly on cylinderhead, use solid shims to adjust spring load if required
#ALWAYS use CAT004/C race cam followers (low friction coating)

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