[W126 Coupe] 560 SEC Supercharger Mod

[Alexander Hochhausl]

My posting won’t go through, how come?
 
-----Original Message-----
From: Alexander Hochhausl [mailto:plustech at optonline.net] 
Sent: Wednesday, November 21, 2007 11:33 PM
To: 'Mercedes Coupes Mailing Lists'
Subject: 560 SEC Supercharger Mod
 
Hi All,
 
I hope my attachments make it through – the AVI may throw it over the
top.
 
Here are some pics to tempt your juices. These are just some pics and a
video clip – really just for the sound. It is an awesome sound – the
clip does not do it justice. Please excuse, this is my daily driver so I
don’t have the luxury to keep it 100% clean as I should.
 
Compare the US headlights (left) with the Euro (right).
 
Next as set of 17” AMG rims I picked up (with nice 225x45 tires) for a
song, and virtually like new. However I need to space them out about ½”
– they clear everything, but the offset is different. I’m not sure if I
like it – I am not one for the “pimped” look, but it is sportier than
the stock look. 
 
Finally the Supercharger pics. I will be posting a parts list and
drawings of mechanical parts and electrical diagrams. Please check my
past postings for questions on which supercharger I used. Many will
work, but will require modifications to the brackets. This is not a
beginner project, but is feasible with a decent home garage. The most
difficult part is the intake adapter. If a considerable number of people
are interested in buying this part I can get a bulk discount on fabbing
this part (which I will pass along), but I am not looking to build/sell
parts – I’m doing this as a return-favor for all the good info I have
received from the site. I will post a detailed PDF of a dimensioned
drawing of the part. I made it myself out of a block of aluminum (and
I’ll tell you where to get it for ~$100 for the material) but you will
need a drill press and some skills to make it yourself (not to mention
patience). But it took me probably 20-30 hours to make – so I don’t want
to mislead you – it is possible, but not impossible, but certainly not
irreversible, an definitely worth-it.
 
So – onto the fun part. This Mod truly brings out the potential in your
560. Forget adding 5-10 HP, this adds 100+, easily, and I have to admit
– it turns you back into a teen-ager. BUT – if you abuse it, you will be
sorry. I have had this on my car for just about a year, 150K+ miles on
original engine and drive train, and the car runs perfect. I have put
many new cars to shame. The quiet SEC turns into a monster once you ram
the air it needs down it’s intake. But if you abuse your car, then it’s
your fault – I take no responsibility – just showing you what I did, so
I hope it will bring you the joy it brings me
.. yada, yada
.
 
Onto the Pics:
 
The engine compartment showing the major components (while running – see
the oil pressure gauge). I am running this off the AC pulley for now.
I’ve been (slowly) working on an alternate drive, but I don’t have that
solution yet. If you look at the lower left corner, you’ll see a
cold-air intake going through/into the wheel well below. More on this
below.
 
The cold air intake – is under the frame, behind the bumper. This clears
the front wheel. The shield is mandatory to keep the filter element dry
when driving through a puddle. Yes, I’m sorry but the white elbow is a
Home Depot PVC 3” drain elbow. Cheap, but the dimensions, and $3 price
tag are perfect. This is one of the key mods for optimum performance.
 
The blow off valve (pink) is mandatory, unless you want to blow out the
bottom plenum of the air flow sensor assembly (which I did 3x). Simple
add-on for less than $100. Not an issues unless you back-pedal at high
RPMs and the slug of air has no-where to go – which happens at red
lights – duh!
 
Shot from under the passenger wheel-well shows the oil supply line
tapped in where the oil pressure sensor is normally located. This is a
home-made adapter, but very simple (like me). Also the hose on the right
is the oil return to the block/oil pan – you have to drill a hole & tap
it for the return fitting. Easy to do, but you can’t be afraid. There is
a way to do it to minimize the amount of aluminum chips falling into the
oil sump. The filter element on the right is from the (soon to be)
removed air pump (usually in intake air filter housing).
 
The AVI gives you a taste of the sound. The real experience won’t
translate onto the web-site.
 
OK All. Stay tuned. I just wanted you to know – it’s coming – just takes
time with real life in the way.
 
Please hold your questions until I can post all the info - Sweet dreams.
 
 
 
Alex H
89 560 SEC (Supercharged)
81 380 SLC
 
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