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December 2008<br />
Because of the New Years Eve drinking at Martin‟s we all got to his hide out at Emmer Compascuum (NL) bringing<br />
sufficient Italian Nastro Azzurro beer, Salame di Friuli and Oliebollen Olandesi and for the occasion William had all<br />
bearings placed and measured. The four main bearing caps are coded by center punching and are related to the numbered<br />
bearing supports crossing the block (above) which are taking all the resultant forces from the crankshaft and carefully<br />
notice the multi compartment structure of this timelessly modern designed block.<br />
William (Wim in dutch left) got all valves fitted into the<br />
Francosporto 3C streamlined ported heads. (discussed in “Why<br />
not 3C”)<br />
The oil scheme (below) shows oil pressure coming through the oil<br />
filter, feeding all 4 main bearings first as well as the upper<br />
bearing of the vertical oil pump/distributor shaft and the chain<br />
tensioner. Vertically from the main bearings on, pressure is fed<br />
to the #1, 2 and 3 camshaft bearings. All left and right 6 rocker<br />
bearings are conveniently pressure fed from the most forward<br />
#1 camshaft bearing. The cam followers get oiled by return oil<br />
from the rocker case along the pushrod ducts. The rear camshaft<br />
bearing and the 90° cog wheels get oil fed from the #3 bearing<br />
through the camshaft, the last part being hollow. At high revs the surplus oil in the rocker case flows back through two<br />
return ducts in between each 3 cylinders,<br />
while the cams themselves are lubricated by<br />
waist oil from the big ends.<br />
My digipic (next page top) shows a nice<br />
possibility to attach an external oil cooler line<br />
to the right side of the block and is pressure<br />
fed from the #2 main bearing. Avoiding full<br />
oil pressure on the cooling line could be quite<br />
possible by using the (11) waist exit from the<br />
oil pressure control valve inside the block.<br />
The advantage will be that no pressure<br />
control is needed at the return of the line for<br />
instance to the right side of the sump. Maybe<br />
sometimes a similar oil filter bracket with an
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