[W126 Coupe] V12 SEC

[Sharan Bains]

Satish,

A MAGNIFICENT job. CONGRATULATIONS !

I am currently in the process of the same conversion....only a few people 
knew about it although I did allude to it in a posting a few months back. I 
should be finished with mine about end-June.

I am putting a 1993 w140 600SEL motor in my 500SEC 'AMG'. The M120 and 
722.362 will be mated to the 3.27 LSD I acquired a few months back. As the 
car is a 1985, I do not legally need to run with cats (which were introduced 
here in '90).

You're right about cost - it doesn't cost much, provided you do your 
homework and have contacts. I too am doing ALL the wiring and plumbing work 
myself with the exception of the engine bay fabrication which is being done 
by a family friend who runs an MB bodyshop. I got the entire 600SEL for 
approx US $7000. I have already sold the body + interior and other bits for 
$3000. Plus I will get approx $1000 for my old Euro 500 engine and tranny 
and 2.24 LSD. So net total cost will be approx $3000 + any unforeseens. And 
I took alot of expensive accesories of the 600SEL which will make their way 
onto my w124 E500...

BUT...you do have to ensure you do your homework, as Satish has mentioned, 
the parts on these engines are a fortune. I got my S600 dirt cheap because 
the EGAS throttle control module was faulty. A new one from MB costs a cool 
$7500 ! That's just one module and more than what the entire car cost me - 
easy to see why the guy sold it! BUT....I have plenty of MB contacts here in 
the UK and acquired a working EGAS module for a tenth of that price - and 
it's a latter part no. too which superceded the previous. (Add $800 to the 
unforeseens).

I'm aware of the oil pans and custom mounts issues already. My main concern 
is electronics as my 500SEC does not have ASR - and I'll have to convince 
the ASR module (which also governs ABS, cruise and communicates with tranny) 
that all is well wrt speed signals.

The final result will be well worth it - however, I am doing a few other 
special mods on my 500SEC 'AMG' apart from the V12.....all to be revealed in 
late June....

Once again Satish, your work is an INSPIRATIONAL piece of ART !

talbir





>From: "Satish Tummala" <satish at tummala.net>
>Reply-To: satish at tummala.net,Mercedes Coupes Mailing Lists 
><mbcoupes at mbcoupes.com>
>To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
>Subject: Re: [W126 Coupe] V12 SEC
>Date: Mon, 18 Apr 2005 15:44:55 -0500 (EST)
>
>You forget,
>
>The 119 cost me $5000 total (no labor cost),  The V12 cost me about $8K
>(no labor cost).  If I sell the 119 with trans, it will cost me around $3K
>net difference to upgrade to the V12.  I spent nearly $16k for the 6.0L
>117 motor, got $13,500 back so not much difference.
>
>That makes $5K plus $2500 = $7500 TOTAL over 6 years.  That upgraded the
>whole engine, transmission, all belt drive stuff, computers, etc.
>
>Of course, if someone else was to have it done, it could approach $100K
>easy.  I would estimate $7000-$10000 in just labor alone for the V12 +
>engine.
>
>I certainly wouldn't advise anyone to go buying new V12s, rather used or
>better yet, a whole wrecked car would be best.
>
>The 10 computers plus EZLs and harnesses are $17500 from Mercedes.  The
>long block with belt-drive items.  The two throttle motors are $7000 for
>the pair, the smog pump is $2000 with the clutch, etc., etc.
>
>Definately, buy used stuff and go through it all.
>
>Also, you CANNOT use a W140 V12 engine for direct fit.  The upper oil pan
>will NOT work at all.  It MUST be a 600SL motor/lower oil pan.  I bought
>an S600 motor and had to swap out the upper and lower oil pans and oil
>pump.  Unless you have some connections, be prepared to pay $2000 for that
>setup alone.
>
>The A/C manifold from the W140 engine will not work with the W126 neither.
>  A new manifold from a 600SL is $780.  The air boxes from the W140 won't
>work as well.
>
>However, the W140 V12 has more hp than the R129 V12.  The 600SL is rated
>at 389hp, the 600SEL at 402hp.
>
>Finally, the motor mounts have to be machined from aluminum blocks for
>correct fit.  We have a Bridgeport in house so it works for us.  We even
>stamped MB part numbers on the mounts for laughs.
>
>So....buy a whole wrecked car...shop Ebay....that's where I bought all my
>engines from so far.
>
>Satish
>
>
> > Holy cow, you must have spent over $100,000 on your
> > 560 SEC over the years.
> >
> > Jim
> >
> > --- Satish Tummala <satish at tummala.net> wrote:
> >> Yes.
> >>
> >>
> >> > So is the V12 now in your car?  Making this the
> >> 4th
> >> > engine the car has seen?
> >> >
> >> > David
> >> >
> >> > --- Satish Tummala <satish at tummala.net> wrote:
> >> >> Here's a quick picture...I'll post more later...
> >> >>
> >> >> In summary, according the the 1992 factory tech
> >> >> book:
> >> >>
> >> >> M120.980 6.0L V12 - 48valves, DOHC
> >> >>
> >> >> - 402hp with cat, 418hp without cat
> >> >> - 428ft/lbs of torque with cat, 440 ft/lbs of
> >> torque
> >> >> without cat
> >> >>
> >> >> - This car doesn't have cats
> >> >>
> >> >> - 3.06 LSD rear end
> >> >> - 1st gear start
> >> >>
> >> >> More later...
> >> >> > The MB Coupes Website!
> >> >> W126 SEC Mailing List
> >> >> Postings remain property of MB Coupes, L.L.C.
> >> > The MB Coupes Website!
> >> > W126 SEC Mailing List
> >> > Postings remain property of MB Coupes, L.L.C.
> >> >
> >> >
> >>
> >> The MB Coupes Website!
> >> W126 SEC Mailing List
> >> Postings remain property of MB Coupes, L.L.C.
> >>
> > The MB Coupes Website!
> > W126 SEC Mailing List
> > Postings remain property of MB Coupes, L.L.C.
> >
> >
>
>The MB Coupes Website!
>W126 SEC Mailing List
>Postings remain property of MB Coupes, L.L.C.