????????????????????????????????????????????????????
Before You Begin:
It?s
no secret that Carbs sound the business and also increase power considerably too.
They?re an old technology, but if it ain?t broke, don?t fix it as the old
saying goes. Not only do they chuck enough fuel/air mixture into the engine to
run Chernobyl,
they sound awesome as well. The following article was pinched from REV?s magazine, so thanks to them. The article was based on
the great blokes from Aldon Automotive in the West Midlands who are bloody experts in this conversion.
Tool Up:
If
you?re contemplating doing this conversion yourself, then get tooled up first.
There?s nothing worse than getting halfway through a job only to realize that your missing something.
1)
Socket Set.
2)
Spanners.
3)
Stanley Knife.
4)
Screwdrivers.
5)
Drill.
6)
Nuts & Bolts.
7)
Extra Vacuum Hose.
8)
Cooling Fan.
Changing
to twin carbs from fuel injection isn?t as hard as you may first think.
Removing the standard fuel injection setup isn?t hard at all. Just be clear and
remember where everything went, in other, don?t rush the job. Don?t expect to
finish this in a single day. Even Aldon had this
particular car for two days to finish the job properly. Let?s begin and good
luck.
|
|
|
|
1.
Work out what everything is and remove the whole mechanical fuel injection
system. It?s all simple workshop-manual stuff, but be sure not to tear
hoses when you take them off.
|
2.
Strip all the other
bits necessary to provide you with easy access ? including radiator, fan, top
hose and scuttle panel. Keep in a safe place as you?ll need these again
later.
|
3.
Grab your new inlet
manifold and gasket set, and then fit them to the cylinder head. On some
cars it?ll be necessary to file the casting in places to ensure a perfect fit.
|
4.
Lubricate your new
?O? ring with grease or WD40. This improves the seal and means they?ll
stick and stretch when the engines running. Plop them on to the manifold.
|
5. Attach
your ready-assembled carbs to the inlet manifold. Don?t bolt them up solid
because you need a little movement on the ?O? rings to stop fuelling
problems.
|
6.
Replace your radiator
hose. The standard one will fit but you may or may not need a longer one
due to whatever car your doing this conversion on.
|
7.
Because your original
throttle cable may come in at the wrong side, you?ll need to re-route it.
Start by drilling a new hole in the bulkhead and inserting a grommet to
avoid chafing.
|
8.
Chop the end of the
cable and attach it to the Weber throttle linkage using the supplied solderless nipple. Get someone to press the accelerator
to check it?s opening full throttle.
|
9.
Drill a couple of
mounting holes in the inner wing for the fuel pressure regulator. This
drops pressure from 60 to 5psi and save replacing the fuel pump.
13.
The vacuum hose will
need extending. Use a flexible piece of pipe about ? inch
in diameter. Connect it from the servo to the inlet manifold.
|
10.
Bolt the regulator to
the wing then connect the tanks fuel line to the inlet and the outlet to
the carb with rubber fuel line.
14.
Re-fit the radiator
and get a new fan if your existing one catches on the filters. Go for a Kenlowe electric for ?80,
otherwise use a slim one from another car.
|
11.
Grab your trumpets (ohh err) and slide them onto the carbs. On some cars
clearance will be tight, but try and use the longest possible trumpets.
Tighten them down with the 8 mounting nuts.
15.
Webers come ready-to-run from the box, but
need setting up on a rolling road for best results. Fuel jets, air jets and
idle jets all need matching to your engine spec.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Verdict:
Well, do
they work. Yes. On a standard Mi16 motor you?ll be
looking at between 8-12bhp increase with more torque and an engine that sounds
like it?s going to bust through the bonnet. It should pull a lot stronger all
the way through the rev range due to more fuel being pumped through the system.
Get some head and Cam work done and you?ll be
laughing. Don?t worry about fuel economy by the way. If you drive sensibly then
you?ll get a nice return. Drive like a bad boy? I think we all know the answer
there!!! Oh behavvvvveeeee!!!!!!!!!!!!!!!!