W111-109-108-113 Mods - Page 8 - Mercedes-Benz Forum

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post #71 of 162 (permalink) Old 05-03-2010, 06:55 PM
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I haven't been recieving the updates here so i was a bit out of the loop. Pagadino you have supplied some very valuable info there.
The advantage of the 560 brakes is in the calipers (yes,you need the later style of master cylinder) .W116 6.9 brakes use a thicker disc rotor which dissipates heat a lot faster and is interchangeble with the W126 parts.
A jag is a lot weaker in the torque department than a M100 .. :-)
Your automatic will work fine,plenty of racers in the 70's used them.
The air compressor on the 6.3 engine actually uses very little power with the compressor only working when running over uneven surfaces. You are wise to stick withe air suspension,the advantages of infinitely variable air suspension over steel springs far out weigh the alleged advantages of steel springs. Changing over too solenoids and a bigger compressor and irtank is done here in OZ by the low rider crowd .The mercedes air valves work very well but are very expensive to get rebuilt although you only need to get them done once every 20 years or so... LOL!
The steering box in a 6.3 is a different unit to a W108 box although they use the same housing. the ratio is faster,the pitman arm and idler arm are also shorter.
You can very quick steering by using a 370mm steering wheel too. The mercedes steering has very nice road feel,vastly different to the USA powersteering of the same era.
Some of the guys in the M100 club [/url]www.m-100.cc[/url] have had headers built and Justin Curry here in Brisbane had a set made. Unfortunately the anal retentive who made them says they are a secret design and wont allow pictures...
On the m100 are some pics of 6.9 headers though. These are a mates (Dr Q) headers on his 6.9.
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Last edited by mercmad6.3; 05-03-2010 at 06:57 PM.
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post #72 of 162 (permalink) Old 05-03-2010, 07:33 PM
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Jeeezus!!!!
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post #73 of 162 (permalink) Old 05-03-2010, 08:09 PM
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I just noticed the bell housing. Is that a Automatic housing with a flange welded to it? If so,I may make the same for mine .
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post #74 of 162 (permalink) Old 05-03-2010, 08:27 PM
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That's a 3.5 manual trans bell housing with a flange welded in the back. there is also an home made intermediary flange between the block and the bell housing. The previously posted 722.6 detacheable bell housing would be a better option. You would need to machine a 3.5 flywheel to get to the smaller diameter and fit the later M117 starter ring.

Would that be for an M117? If for your 6.9 project, then may be the 6.9 bell housing may be more adapted I guess
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post #75 of 162 (permalink) Old 05-03-2010, 10:46 PM
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Hi,it's for the 6.9 .the Bell housing on the 6.9 trans unbolts also ,and i was wondering which trans to use,either a newer auto trans or a manual. I would have to make a flywheel to suit because everything is a lot bigger than the 3.5 stuff . i have a loose 6.9 bellhousing here and it would need a bit of strengthening to make it strong enough to handle the shock loads of a manual. I just need to find a trans (at my sort of price) to suit.
The holden trannys mentioned earlier are far too expensive. I could buy one new from the factory in mexico and get it shipped for $2000 .I see them here for $6000 secondhand.
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post #76 of 162 (permalink) Old 05-03-2010, 11:47 PM
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i could go this way,across to the dark side and use a GM bell housing and tremec ...
Diesel Conversions | 4×4 Labs
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post #77 of 162 (permalink) Old 05-04-2010, 01:34 AM Thread Starter
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Brakes

Well as GGR told the original 6.3 brakes are 273 mm, but there is a second option for road use. Use the 279 rear rotors of the first deries of the 6.3 (ventilated). They fit with the M116/107 callipers for the 278mm brakes with a 1.2 spacer on the inner hub-bearing.

The 126 mod has at the end 300 mm discs and bendix callipers, if you are looking for a protect W126 (Sonderschutz) which have 4 pistion callipers it would be even better for race use.

The mastercylinder is ok, the vacuum on the W111-109 is a litte less multiplicated than the W126. Rear use W107 or 126 calipers with 38mm pistions (normal 35).

Best pagodino
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post #78 of 162 (permalink) Old 05-04-2010, 03:05 AM
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6.3 race car brakes and trans

Hi..thanks to you all again...

on the brakes ill have a look at the porsche option as i happen the have several 996 996turbo brakes around i yard,,

on manual trans i got a call back from a guy that has the proper ZF box and i reckon i might have it at a good price,,normally 3500 to 5500 pounds here
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post #79 of 162 (permalink) Old 05-04-2010, 09:16 AM
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race 6.3 zf gear box

Sorry to jump from one subject to another...

As mentioned i decided to take ALL your advice and not mate the getrag dog leg box to the 6.3..for the possibility that it would be at the top of its limit...so i have now 2 very good getrag gearboxes up for sale for lower powered applications...anyone??

Just a quick question...was there a bell housing,clutch and flywheel available for the m100 and the ZF S5 24/3 box,,,as it was the manual box mercedes offered at the time...maybe im not correct..but now that i have found a ZF it would very handy...

Also is there any difference in the 6.9 and 6.3 engine to bellhousing fitting.

Thanks..
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post #80 of 162 (permalink) Old 05-04-2010, 09:36 AM
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fotos 6.3 race car project

Ron..others..
i have now worked out how to add fotos ,,incase your interested this is my car a couple of months ago...panels are now fitted again after all the fabrication work was finished..

also my son put on you tube when i first moved the car after initial strip down and rebuild,,

you tube heading "mercedes 1st time out"

good luck
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