Club126UK
Fiat 126 Chat => Tuning & Customising 126 Models => Topic started by: alapimba on May 11, 2010, 04:57:06 PM
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Hello
I'm gonna buy a 35/75 camshaft for my 126 engine but i have one doubt.
The cheaper i found was 100€ iron or 150€ steel on the 500mania.it website.
Whats the diference between iron and steel?
It's bad if i buy the iron one?
Anyone knows any place with better prices?
Thanks
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I would say that for regular fast road use the nitro cast iron should be OK . Not a material spec I am familiar with but it suggests that it is a carbon controlled steel alloy to give greater strength. The nitrided steel one could well be the same shaft but has been case hardened & core refined to give better wear & durability [-/
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The iron one would be made from a cast iron blank (rough profile suitable for a range of finished specs) that is then ground to a final profile.
The steel cam is turned (ground) from a blank steel billet then nitrided for strength. This is a more complex process and suited more to one-off production and therefore more expensive.
The cast iron one despite being cheaper should wear better in the long term.
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The iron one would be made from a cast iron blank (rough profile suitable for a range of finished specs) that is then ground to a final profile.
The steel cam is turned (ground) from a blank steel billet then nitrided for strength. This is a more complex process and suited more to one-off production and therefore more expensive.
The cast iron one despite being cheaper should wear better in the long term.
so in your opinion i should buy the one made of cast iron?
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If they are the same profile I think would go with the cast (in fact before I converted to four cylinder in my 500 I did have a cast 40/80). I would however out of curiosity ask the retailer why the two types and see what he says.
I notice that the steel ones are not in stock so would, I guess, be made to order. There is also a chance that one manufacturers 40/80 is not exactly the same as another. It is also possible to get an original cast cam re-profiled to certain specs. a re-profile however can affect the overall size of the lobes which then needs to be made up with bigger shims or more adjustment on the tappets.