New 6.9 purchased

Post by **m48pro69** » Tue 15 Apr, 2014 10:14 pm

Hi guys I have just bought myself a new 6.9 its a 1977 euro Milan brown with brown velour interior. It has been in Australia since 1977. Will upload pictures tomorrow pickup at lunch time. :dance:

Post by **Greg in Oz** » Wed 16 Apr, 2014 12:19 am

Congrats! Milan Brown was a great colour in a W116 as it contrasts so well with all the chrome. Brown velour is interesting. It seems that MBs of that era had interiors that either contrasted with the exterior or matched the exterior. The Euro deliveries particularly favoured velour that matched the exterior. My Swiss delivered Thistle Green 500SLC has green velour interior, a very '70s and early '80s look. Your 6.9 being a Euro spec will also perform better than the local deliveries with their ADR27a compliance. Looking forward to seeing pics. Enjoy!

Post by **m48pro69** » Wed 16 Apr, 2014 2:49 am

Hi Greg some te aser photos courtesy of the gentleman i sold my motec project 6.9 to. He addvised me to go have a look at this car. Very glad i did http://s67.photobucket.com/user/geoffgr ... 1310077161

Post by **Aegean** » Wed 16 Apr, 2014 10:01 am

So a UK import ? It looks to have the hi-comp motor.

Post by **m48pro69** » Thu 17 Apr, 2014 4:59 am

No it was sold in Germany in 1977 and then came to Australia in the same year. I am the 3rd owner gentleman i bought it from has had the car since 1995 . Car had 303000km on it then he only put 18000km on it in that time. It has had regular servicing in the time he owned it. Car is Milan brown with Brown velour still has becker mexico and emergency rubber blocks. Spare tire is still Michelin xwx so i dont think i will use it.

Post by **Michel** » Thu 17 Apr, 2014 6:37 am

Congratulations...

Although Milan Brown is not my favourite colour, yours does look very sharp!

Post by **AMG** » Thu 17 Apr, 2014 7:43 am

A lot of people bag the Milan Brown, and it does have to be said, that when they do not present with good paint, they do look very very - well.... they look terrible.

But a car that presents with good paint, good chrome always looks very very nice. It's just one of 'those colours' which has a capacity to polarize opinion.

It's also one of the colours that suffered from intense fading and separation of the clear coat, which results in the milky haze forming on every exposed part of the metallic paint.

I really like the colour, and with that chocolate velour interior, I'm sure it will look really sharp once you've detailed it. I think that's an impressive car for the money.

The fact that it's original really helps also. 1977 is smack bang in the middle of Mercedes' 'colourful' era, when their cars had some of the most impressive colour combinations out there.

Brown on brown might not be everyone's cup of tea, but I can guarantee that when you park it up at a concours, it WILL get a lot of looks, because that chrome will just bring people to admire it.

The m100 under the hood helps a bit too

Nice work on the purchase!

Post by **m48pro69** » Thu 17 Apr, 2014 11:10 am

Thanks first repair will be to fix the airconditioner as it has not worked since last owner bought in 1995 . Then we will see what is next. Geoff

Post by **m48pro69** » Thu 17 Apr, 2014 8:43 pm

Hi guys today i fitted the number plates that were last on my supercharged one tonner. So my 6.9 has a lot to live up to . :dance:

Post by **markb** » Fri 18 Apr, 2014 12:06 am

Congrats. on the find, looks like an original gem !

I love Milan Brown in good nick..and brown seems popular again now on new Audis etc.
"what's new is really old" .... think of all those '70's colours on Porsche 911's: brown, orange, green.. :boohoo:

Post by **oliveoyl** » Sun 20 Apr, 2014 10:02 pm

Congrats, looks tops!!

Post by **m48pro69** » Mon 21 Apr, 2014 6:11 pm

The funny thing since moving to my brothers while I sorry out my personal life. Is my 6.9 is the least powerfull car in the driveway my brother owns a black BF 2 GTP and my sister in law owns a AU 3 TS50 . Then next door is a 700hp VZ ute and 1000hp VE ute http://m.youtube.com/watch?v=LZ5C_Mwn9XU ute now has the same plates in W.A

Post by **m48pro69** » Sat 26 Apr, 2014 6:50 pm

Picked up my 16 x 8 penta's today thank you Giles pleasure doing business with you . :dance:

Post by **Giles** » Sat 26 Apr, 2014 7:22 pm

No problem Geoff, I hope the bonus bits come in handy.

Giles

Post by **Giles** » Sat 26 Apr, 2014 7:37 pm

Giles wrote:No problem Geoff, I hope the bonus bits come in handy.

Giles

P.S. I just remembered whT I did with the boot handle.

image.jpg

Post by **m48pro69** » Sat 26 Apr, 2014 8:32 pm

All good thanks Giles :dance:

Post by **AndrewsSL/SEL** » Sat 26 Apr, 2014 8:51 pm

Now I'm very keen to see this beast with it's new rims fitted

Post by **m48pro69** » Sat 26 Apr, 2014 11:14 pm

Hi Andrew currently getting quotes to repaint the car . So watch this space :dance:

Post by **m48pro69** » Tue 06 May, 2014 8:32 pm

Hi just an update still waiting on steering wheel to arrive. Dropped of Penta's at Wheel Gleam Osbourne park today outer rims being machined and polished centres being painted in MB404 cost $160 a Rim. Business advised by another forum member who had them do his Penta's. Will add photos when I pick them up. Geoff

Post by **m48pro69** » Thu 08 May, 2014 6:27 am

Hi just an update recent purchases for my 6.9 ahead of painting http://s67.photobucket.com/user/geoffgr ... ort=3&o=10 http://s67.photobucket.com/user/geoffgr ... ort=3&o=10

Post by **m48pro69** » Fri 23 May, 2014 9:59 pm

Ok the first results are in. 230.1 HP at rear wheels for a standard 77 Euro 6.9 . flywheel corrected power is 288.9 HP so my car is very healthy as factory specs are 286 HP at flywheel . Car had Penrite HPR 10 oil full synthetic 10-50 put in last week . New NGK iridium plugs and New air filter. On Monday car goes to Genie for Extractors Duel 2.5 inch exhaust with x pipe and 92mm throttle body to be fitted. Then back for re run on dyno .

Post by **cuisses** » Fri 23 May, 2014 10:47 pm

Nice performance curve. Out of interest, how much was this test?

Also, do you know how they translate the data from the rear wheels into data at the flywheel. You need to know how much power is lost in the transmission, which I would think could only be estimated. Do they have some enormous chart that tells them the fraction of power lost for all kinds of trannies?

Post by **m48pro69** » Fri 23 May, 2014 11:07 pm

Hi David I didn't pay I have had Genie Exhaust agree to make extractors and exhaust . Dyno on standard 77 Euro 6.9 was this morning. Car goes to Genie on Monday they will have about a week . They have agreed to fit lower plenum with 92mm throttle body it has been machined out and adaptor made. It will be hot tanked before fitting. Car will go back to same dyno for re test. As for working out Flywheel power that is something I don't know about other than operator puts in car details . But this Dyno is used in almost all workshops in Australia . Also the dyno they use at Summernats. But seeing as I am from Canberra and intend to move back there in the future you will be able to see car .

Post by **m48pro69** » Sun 25 May, 2014 1:29 am

Ok some more pictures

Post by **m48pro69** » Sun 25 May, 2014 1:39 am

And more pictures

Post by **cuisses** » Sun 25 May, 2014 7:49 am

But seeing as I am from Canberra and intend to move back there in the future you will be able to see car .

I look forward to being overtaken by you in the future. If you see a 280SE 4.5 I just ask that you slow down a bit as you pass so I can get a good look.

At the risk of exposing my complete ignorance, what are the rubber "rocks" in the photo above. They don't look like engine mounts to me - are they some other mount or part of the suspension?

Post by **m48pro69** » Sun 25 May, 2014 7:54 am

Hi David they are known as unobtainiam they are the emergency suspension buffer blocks that most 6.9 no longer have and usually go for over $1000 on eBay . Ps here is the 230.1hp dyno run will do longer video on next one. https://www.youtube.com/watch?v=luR2a-s ... e=youtu.be

Post by **m48pro69** » Mon 26 May, 2014 11:24 am

Car has been dropped of at Genie next update will be in a week's time when I puck it up and get it dynoed. I will be taking pictures off work during the week.

Post by **abl567** » Mon 26 May, 2014 12:10 pm

m48pro69 wrote:Hi David they are known as unobtainiam they are the emergency suspension buffer blocks that most 6.9 no longer have and usually go for over $1000 on eBay . Ps here is the 230.1hp dyno run will do longer video on next one. https://www.youtube.com/watch?v=luR2a-s ... e=youtu.be

They are available new from the Classic Centre, Irvine CA

Post by **m48pro69** » Mon 26 May, 2014 3:03 pm

Ok that I was not aware off . I just watch ridicules prices they reach on eBay . And my car was the first time I have ever looked at one for sale and they were still present. And having looked at around 20 over the years and this is my 3rd 6.9 that makes them not common.

Post by **m48pro69** » Mon 26 May, 2014 9:37 pm

Car has had exhaust manifolds and exhaust removed today . Start on Extractors tomorrow

Post by **m48pro69** » Tue 27 May, 2014 8:56 pm

Extractor flanges cut and mounted on motor. Pipe work starts tomorrow .

Post by **Greg in Oz** » Thu 29 May, 2014 12:25 am

Are you doing 4 into 1 pipes on each side or tri-Ys (4 into 2 into 1) on each side?

If doing tri-Ys, be sure to get the pairings correct for each side. The cross-plane crankshaft and resulting firing order on MB V8 engines (well, M116 and M117 at least and I assume M100 has the same firing order) mean that the best pairings are cylinders 1 & 3 and cylinders 2 & 4 on the right bank and cylinders 5 & 6 and cylinders 7 & 8 on the left bank. From memory, I think it was the extractors on your previous 6.9 that had the right bank with less than ideal pairing. The photo below shows the right hand side of the M117 used in the 5 litre SLC. The 1-3 and 2-4 pairings of the tri-Y manifolds can be seen. On the left hand side it is simply 5-6 sharing one manifold and 7-8 sharing the other.

These pairings are the best you can achieve on a V8 with a cross plane crankshaft without having pipes cross sides in Ford GT40 style. Only the firing order that comes with a flat plane crankshaft will allow for anything better without a complex crossover extractor setup.

Post by **m48pro69** » Thu 29 May, 2014 2:12 am

Hi Greg thanks for the tip I am going to see Genie in the morning . :dance:

Post by **m48pro69** » Thu 29 May, 2014 1:26 pm

Hi Greg by right bank are you taking that from drivers seat or front of car .

Post by **m48pro69** » Thu 29 May, 2014 1:28 pm

Ps just gave Tony from Genie copy of your picture.

Post by **Greg in Oz** » Thu 29 May, 2014 2:01 pm

Yes, by "right bank" I mean on the right side looking from driver's seat. It is the bank on the driver's side of a RHD car. It has cylinders 1 to 4 and the left bank has cylinders 5 to 8. Note that different manufacturers use different cylinder numbering configurations and there are also different firing orders possible for V8 engines, even among those with the common cross-plane crankshaft configuration used on most production V8 engines including MB.

I have checked the firing order for the M100 and it is 1-5-4-8-6-3-7-2 the same as for the M116 and M117. The best header configuration assuming a tri-Y configuration of 4 into 2 into 1 for each bank is therefore as per my previous post and the M117.960 engine photo. On the right bank the primary pipes from the 1st and 3rd cylinders need to share a secondary pipe and the the 2nd and 4th cylinders need to share a secondary pipe. On the left bank the 1st and 2nd cylinders need to share a secondary pipe and the 3rd and 4th cylinders need to share a secondary pipe. The four secondaries then merge into the twin exhausts under the floor in the usual fashion. Typically there will be a balance pipe or "X-pipe" between the pipes under the floor.

This photo shows the four secondaries emerging from under the engine bay of my 500SLC and how they merge into the twin system ahead of the front muffler. Rather than an "X-pipe", the 500SLC uses a balance pipe across all four secondaries. The "X-pipe" tends to be more popular today.

Post by **m48pro69** » Thu 29 May, 2014 2:38 pm

Tony from Genie said thanks for the picture . :dance: And x pipe is being fitted with duel 2.5 inch exhaust . :drool:

Post by **Greg in Oz** » Thu 29 May, 2014 2:58 pm

At http://www.peachparts.com/shopforum/att ... ay-010.jpg you can see right side of an M117 with the same tri-Y configuration only in tubular headers/extractors. I can't find any images showing tri-Y or headers fitted to the left side, maybe because that side isn't as interesting with adjacent cylinders sharing. I did find the photo at http://www.peachparts.com/shopforum/att ... g_0141.jpg which shows replicas of the AMG tubular headers for both sides of the M117 used on the 500SEC. With short primaries these are very similar to the cast iron tri-Ys. Just the same, the photo shows how the cylinders are paired.

Post by **m48pro69** » Thu 29 May, 2014 3:17 pm

Thanks Greg just sent drivers side picture . :dance:

Post by **m48pro69** » Thu 29 May, 2014 8:00 pm

Hi Greg in case you have not seen a M100 crank and piston conrod . Here is the crank from one I killed years ago going to have it powder coated to use for a letter box. Crank angle is 90 degrees to each journal.

Post by **Greg in Oz** » Thu 29 May, 2014 11:44 pm

m48pro69 wrote:... Crank angle is 90 degrees to each journal.

Hence the term "cross plane crankshaft". Some V8 engines use a "flat plane crankshaft" where every crank pin is in a single plane. These are generally only used in high performance and racing applications and have a distinctly different exhaust note to a cross plane V8 as they are essentially two inline 4 cylinder engines sharing a single crankshaft. Examples are Ferrari V8s and the V8 used in the Erebus Mercedes V8 supercar. One advantage of a flat plane crank V8 is that a simple 4 into 1 or a 4 into 2 into 1 exhaust header/extractor arrangement on each cylinder bank will result in evenly spaced exhaust pulses and optimimum scavenging as the firing order alternates between banks. With the cross plane V8, for each separate cylinder bank the exhaust pulses are not evenly spaced resulting in less than ideal scavenging and the familiar V8 exhaust note. Most exhaust configurations for the cross plane V8 are therefore only a compromise with the arrangement in my earlier posts being the best possible without resorting to the crossover arrangement used on the Ford GT40 (do a Google image search for "GT40 exhaust" to see what a work of art they were).

Post by **McGavin** » Thu 29 May, 2014 11:53 pm

Spaghetti . :)

Post by **m48pro69** » Fri 30 May, 2014 1:23 am

Thanks Dirk but have seen a real GT40 Bowdens a few years back at AGP . Yum :dance:

Post by **m48pro69** » Tue 03 Jun, 2014 8:25 pm

Ok 560 Air Cleaner arrived today thanks Michel. Went over to Genie Started on pipes going to be balanced . From Greg ( The cross-plane crankshaft and resulting firing order on MB V8 engines (well, M116 and M117 at least and I assume M100 has the same firing order) mean that the best pairings are cylinders 1 & 3 and cylinders 2 & 4 on the right bank and cylinders 5 & 6 and cylinders 7 & 8 on the left bank) Thanks. So we are doing this as it is optimal to making power last set were compromised. To fit drivers side some metal has been removed from the drivers side engine mount.

Post by **Greg in Oz** » Tue 03 Jun, 2014 10:51 pm

Looking forward to seeing it all when it's completed and am interested in the gains on the dyno. Obviously a lot more work would be needed but it would be interesting to see how much power is gained from each individual mod separately (ie. air filter, throttle body, extractors & exhaust).

I'm sure the greatest power limiting areas on the 500SLC are throttle body and exhaust rearward of the engine pipes. It's low to mid range torque is strong however beyond around 5000rpm it feels restricted. Its exhaust system rearward of the engine pipes is shared with every other 107 model including the 280. Only the tri-Y manifolds and engine pipes were unique to the 500SLC (and LHD 500SL).

Post by **m48pro69** » Tue 03 Jun, 2014 11:17 pm

Hi Greg current power was tested at 230.1hp at the wheels exhaust was under 2 inches each pipe. As said new exhaust will be 2.5 inches per pipe. Next dyno will be with extractors , exhaust and throttle body. Air Cleaner will be fitted when repairing Air conditioning. as need to move line and replace passenger side intake as shown with SL so they are same size. Will dyno again after fitting also thinking I will remove engine fan and fit electric fan . Geoff :dance:

Post by **McGavin** » Wed 04 Jun, 2014 9:36 am

Very nice Geoff. Is there an optimal exhaust size for the M100?, when I researched the M117 most agreed on a twin 2 1/4 set up, although StreekyG's twin 2 1/2 sounds awesome.
viewtopic.php?t=12705#p82608

Post by **m48pro69** » Wed 04 Jun, 2014 11:35 am

Hi Dirk that an easy one to answer most exhaust company's provide info on their web pages. Going with 2.5 duel as I don't want to lose to much low end torque. http://www.magnaflow.com/07techtips/faq/question10.asp :dance:

Post by **m48pro69** » Thu 05 Jun, 2014 7:16 pm

Ok not much to show yet but drivers side pipes are done with cylinders 1&3 , 2&4 paired down pipes to be added then to start on passenger side. After completion extractors are going to be ceramic coated.