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Author Topic: Group N cams  (Read 1440 times)

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Marty

  • Guest
Group N cams
« on: February 23, 2008, 15:27:40 PM »
I've been offerd a set of Group N cams for my engine.
Now I'm not clued up on Group N spec but from what I've read they have to be within 2° duration and .2mm lift of the OE cams.
Does anyone know is this info right? I strongly suspect it is (as the seller is unable to give me the 'exact' specs    ) in which case it would just be a waste of money  



andykay

  • Guest
Group N cams
« Reply #1 on: February 23, 2008, 17:09:33 PM »
Here is a quote from the rule book

a.        The use of Group N Cam profiles these are normally used in cars where the Championship rules specify that standard cam profiles must be used. But the FIA & most other motor sport governing bodies give a tolerance which is usually + or ‚€€œ 2 Degrees on the duration & + or ‚€€œ 0.2mm on the lift. So these are taken advantage of on special ground profiles that are extremely accurately ground to the upper limits of these tolerances. But unfortunately the gains from this type of profile are very small. In Group N type Championships though, any small gain is always worth having, but for any other competition where such rules do not apply we would not recommend this type of profile.

Andy

Marty

  • Guest
Group N cams
« Reply #2 on: February 23, 2008, 17:17:30 PM »
I came across that too earlier, waste of money I guess for a road car

 

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