[alfa] Euro-Cam timing with VVT

["Damien Gaboury" <dgaboury@xxxxxxx>]

Hi all listers,



In the search for more power, I ordered euro-cams recently for my 86 Spider.
Following numerous reading about camshafts, I am questioning me about the
timing of the intake cam relative to the VVT (variable valve timing) device.



I would like to conserve the VVT on the intake cam. My guest is to retard the
timing of the intake cam in order to have a good idle and low-end torque and,
with the VVT in action, having the full benefice from the euro cam (lot of
intake -exhaust overlap, 99.5 degree off lobe).



If this consideration is right, how much degree should I retard the timing of
the intake cam ? In fact, the question is: what is the maximum advance of the
VVT while in full action: 18, 20 25 degrees?



Is that maximum advance is relative to the crankshaft (x 2) or it is absolute,
I mean in degree of camshaft rotation?



Anybody have experienced various degrees of timing for the euro-cam with the
VVT ?



On the other hand, Is it preferable to add stronger valve springs with the
Euro cams ?



Any tips will be appreciated.






________________________________
Damien Gaboury
Chicoutimi, Canada
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