Michel
I looked at a few of the direct links you provided but all I can gather is that engines have been modified(they show photos and
diagrams), I couldn't find for what purpose (more mileage presumably?)
and with which results. Could you find any before/after mileage data as
opposed to enthusiastic talk and mod diagrams?
One page of interest is the Mod of the Peugeot 505. There is some real
world data in there, but of course it could have been done in a more
professional manner.
http://quanthomme.free.fr/qhsuite/aut34peugeot505herve.htm
