re-ground "performance" cams?

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re-ground "performance" cams?

Postby ross.cheeks » 30 Nov 2007, 11:29

just wondering what the score is with them, seeing as no-one makes them new and original ones never seem to come up, im guessing having one reground is the only option. dont know to much about them though so was just wondering if any one has used them, what they thought etc.

cheers ross.
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Postby Gordo » 30 Nov 2007, 13:10

Personally, I don't care for them.
In order to grind the new profile, the base circle is ground down, with the rest of the flank, exposing the new tip and profile.
Whilst you may get away with it with a pushrod engine, it will affect the geometry. With overhead cam engines, there is a risk the range of the follower adjustment will be insufficient to make up for the difference in base circle.

If you've a good stock cam', and just want a mild regrind, go for it - I certainly wouldn't use one for a performance engine.
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