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Going through friends 528 Wedge with CNC ported Indy heads. He bought it complete a couple of years ago from states, and it really hasn't performed according to expectations. I'll tear it a part and check it, and while at it he wants to install avacuum pump since the engine was designed to use one. What all is needed, and where to get the parts from? As far as I've understood,you aim at certain vacuum and limit it with aomekind of a leak retriction? Any good links or articles?l



There are a few companies that make a decent vac pump...
Moroso makes 2 versions a 3 vane and 4 vane... I
have a Aerospace unit and I dont care for it(doesnt
pull enough)... with all the reading I did I found
that you dont want to exceed 14"HG or you get into
wrist pin oil issues... I pull 12"HG with just my
dry sump pump.... what do you need... the pump, lines
(I used braided lines), a good baffle in the valve
cover and a puke tank to catch any oil that the pump
pulls out(get a good one...get one that enters near the
bottom... if it inters near the top it sprays oil/mist
into the exiting air flow path and out the breather)...
then the only other thing would be the check valve
that would be mounted to the other valve cover...
some are adjustable, some fixed for the setting..
back to the pump... Moroso says the 4 vane was race
only and will pull more than 14", there is another
good pump(forget the name but its Motorsport something)
and they sell all the parts... also you need a drive
system... crank pulley and belt.... some but not all
of the pumps come with some sort of mounting....
thats about all I can think of