absolutely right this I also have written, but anti-mirror wise - so when the closing is right the opening ist off please tell me how you want to meassure 0,007 mm? this are 7/1000 of a mm. you not even can meassure with a feeler gauge exact to 1/100 mm and you now tell me something from 7/1000 mm? wpuld be great if you could explain to me how you do this or with what for me unknown tool you use. also right, that is why I always meassure the opening and the closing and if the closing is more the 3 ° off I adjust new so that for opening and for closing I have the same difference to this what F says. this difference is a result of the not exact 0,50 mm great diagram vincenzo , same you postet on 6th march 2016, and it is absolutely correct
Good catch... I measured the clearance with an assortment of feeler gauges, both metric and imperial. Added to that, I used ‘feel’ and ‘experience’ to guess at the actual number. Highly questionable method and one that I cannot defend. That said however... the exact clearance is irrelevant. The number that requires our only and greatest attention is the actual duration we measure... 242.1 degrees in the example. The 0,507mm is truly nothing more than a reasonably close guesstimate to illustrate how far the duration moves with so little difference in the 0.5mm spec clearance. The 0,507mm is not used in any of these calculations.
Now we need those same photos from the intake and exhaust cams of another 512TR -- no one has another 512TR engine apart?
This FOR SALE ad for some TR cams: https://www.ferrarichat.com/forum/threads/set-of-4-oem-ferrari-testarossa-camshafts-750.632272 shows that the F part numbers shown on the cams themselves (A122811, S123106, A123102, S123104) do not match any of the TR SPC part numbers for the finished cams. For me, that's strong evidence that the numbers shown on those 512TR cams are also internal manufacturing numbers for the unfinished 512TR camshafts (so can't be used for identification).
