[W126 Coupe] 560 SEC Supercharger Upgrade Anyone?

[Eddie]

I think what bellamy means is that he's got a 560 that's blown a cylinder.

 

In all seriousness, can you outline how you enriched the fuel some more?
Any plans to upgrade the fuel system or ignition system?

 

There have been several supercharged 560s, (search for jim nowak's car) but
the problem was the stock fuel system couldn't keep fuel ratio balanced once
the compression was turned up.  Also, jim had an intercooler as well as
methanol injection, how do you keep your car from detonating?

 

Any plans to go to the dyno soon?  Can you take a picture of how the belts
are setup?

 

Thanks,

 

Edward

 

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From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Alexander Hochhausl
Sent: Thursday, January 04, 2007 5:26 PM
To: 'Mercedes Coupes Mailing Lists'
Subject: Re: [W126 Coupe] 560 SEC Supercharger Upgrade Anyone?

 

Well, I am no expert. Attached is a pic of what I did. I guess as long as
you are 9:0 compression or less, can fit this in, tap into your oil pressure
line (by the oil pressure sending unit is a good place), add an oil return
line to oil pan, enrich the fuel distributor output, and find a pulley with
which to drive the unit, you are home free! Sorry, did not mean to be funny,
but those are pretty much the steps. No magic, just a few tricks. 

 

That is one heck of a motor though. I've never heard of it. So you have 3
cyls on one side and 4 on the other? Got a picture of the motor - I'd love
to see it.

 

I hope that helps. All the best!

 

-----Original Message-----
From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com]
On Behalf Of Mister McGoo
Sent: Wednesday, January 03, 2007 12:05 PM
To: Mercedes Coupes Mailing Lists
Subject: Re: [W126 Coupe] 560 SEC Supercharger Upgrade Anyone?

 

Would it be feasible to supercharge a 490SEL with a 4.9 litre V7?
 
-Bellamy






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From: jonnery at bigpond.com
To: mbcoupes at mbcoupes.com
Date: Wed, 3 Jan 2007 16:33:05 +0800
Subject: Re: [W126 Coupe] 560 SEC Supercharger Upgrade Anyone?

Would it be feasible to supercharge a 420 SEC 1986 model       Jack OZ

----- Original Message ----- 

From: Alexander <mailto:plustech at optonline.net>  Hochhausl 

To: 'Alexander <mailto:plustech at optonline.net>  Hochhausl' ;
mbcoupes at mbcoupes.com 

Sent: Tuesday, January 02, 2007 10:00 AM

Subject: Re: [W126 Coupe] 560 SEC Supercharger Upgrade Anyone?

 



Sorry, can you change that to Dec 31st? Oops.

 

-----Original Message-----
From: Alexander Hochhausl [mailto:plustech at optonline.net] 
Sent: Monday, January 01, 2007 8:24 PM
To: 'mbcoupes at mbcoupes.com'
Subject: 560 SEC Supercharger Upgrade Anyone?

 

Hi All,

 

This is my first time posting a message. I am an "Old School" Motor-Head who
appreciates the "Finer Cars in Life", maybe older cars, but it's tough to be
the original.

 

Hence I own an 89' 560 SEC for 3 years. Barely still can any of the modern
new cars touch the luxury, performance and reliability of this Model (all
things you all know anyway), but I always wondered: "What if!" & Why is the
upper left side of the engine compartment so empty - looks like a perfect
place for a Super-Charger.

 

So in my Motor-Head way I added a Vortex S-1 Supercharger to my SEC during
the course of this year. Keeping my promiss to my wife to finish this
project this year, I finally took my first test run last night (Dec 31st),
following which I called all my friends, not to wish them Happy New Year,
but to brag about my experience! My wife could tell the result by the look
on my face when I returned.

 

In my best (conservative) estimate I thought the performance gains would be
moderate. I've always thought the 560 has good performance with much
potential, but now I have exploited the potential and it is an absolute
Animal! I have not have not had it Dyno'ed but from my experience and
calculations I think it is pushing around 350-375Hp on the first run. With
some tuning (and a more free flowing exhaust) I think I can push the 400 Hp
mark. The torque gains from 1000-4500 RPM are astonishing - there is no
Turbo-type lag - just hit the gas and the car responds instantly - and
smooth - it is really amazing! I had the biggest __it eating grin when I
came back from my test ride. To be honest, above 4500 the stock ignition
does not compensate enough to avoid detonation (at 8 PSI boost) so I still
have to figure out how to adjust that. I added a switch (blue item in the
engine pic) to automatically override the emission controls and provide an
(inside cabine) user-adjustable fuel enrichment during boost operation to
help keep detonation down and provide maximum power - so simple and works
fabulously. 

 

So the question now is who else is seriously interested in this type up
"real" performance upgrade. I've seen all the garbage products out there
adding 5 hp here, 10 hp there. I spent 12 months (on and off when life, work
and family would let me) making and remaking parts until I got Form, Fit and
Function just right. Being an engineer by profession I documented everything
I did and parts I made. 

 

I don't want to break any fan-club rules, but I am only trying to see if
there is any favorable quantity of people who are seriously interested in
this project. I would be willing to either A) Sell just the paper plans of
what to build, how to install it, where to get the parts, or B) sell the
parts and plans (minus the supercharger - you can get this yourself without
me bothering with it). I am not planning on making a ton of money on this -
maybe break even with my time and $ investment (and take my very
understanding wife out to dinner). Honestly this is fairly simple
"do-it-yourself project" for anyone with a decent set of tools (drill press,
chop saw and files) and mechanical aptitude (one picture of the hardest
fab-part is attached - but I made it myself with a drill press and a-lot of
patience). Once the remaining brackets are made it is a simple bolt-in
installation along with some plumbing and wiring. I am not going to make any
guarantees about the longevity of your cars' drive-train because I know this
is a lot of strain on the stock drive-train - but only when exercised - and
will depend on your driving habits. 

 

Some pics are attached for your reference (sorry, they are Work-In-Progress
and still need to be cleaned up & the engine pic has raindrops on it). I
know I do not have the nicest SEC, but except for the 600 conversion I saw
on the Web-Site, I bet it is one of the fastest! 

 

Next I am eying my wife's 380 SLC - will she notice the difference? Hmm..

 

Thanks for your time and let me know. Send emails to plustech at optonline.net.
Please put "SEC Supercharger" in the subject line - it will go to a special
mailbox so it is not deleted as spam. Feel free to e-mail me with questions.
I have a very busy schedule, but will try to reply ASAP, may take a few days
though.

 

Hasta-La-Vista, Baby!

 

Alexander Hochhausl, PE

 

89-560 SEC

81-380 SLC


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