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So they measure as follows: 6.9 Intake 45mm Exhaust 41.5mm 117 Intake 42.5mm Exhaust 43 x 38mm (not round) Not as much of a difference as I expected!

Yes I think it was a good price for the seller but it did have high compression engine. Looks like an early car with no timber on the console although the speedo looks like km only so maybe parts have been swapped? I had set aside a day to have a closer look but it sold before I had a chance...

Values are definitely on the rise....

Obviously there’s a reason I kept all this stuff even if I didn’t know why at the time...:rolleyes:

Interesting that it seems 420 & 560 inlet gaskets are the same suggesting the ports are the same size! New M100 & M117 gaskets are on their way to compare. Parts are now arriving and the work continues....

That’s not using radical cams either! Might even use LESS fuel depending on how they’re driven! Reliability is built into the stock engines & won’t be affected. This one apparently made 600hp and that was years ago & prior to the tech now available:

When you’re searching for more power, every little bit helps! Particularly important since the majority of flow is at the centre of a pipe. I’ve already spoken to my guy about doing conversions...

For completeness!! Last day of 50; that is all...

I couldn’t find these specs anywhere on any forum! But thanks to a friend on FB here’s the factory specs of valve sizes on engines M110, M116, M117 & M100 6.9. If I find the M100 6.3 specs (or if anyone else has a service manual for one), please post them here for a handy reference.

Well this one is interesting!!

A mate just bought a early ML500 & early indications are the quality is ####e. Not sure what year it is but I’ll make enquires...

FYI most of the Benz crankshaft bolts are 27mm. The M100 is 50mm & apparently torqued to 400Nm! I was looking for the sizes yesterday & found nothing on the web so had to ask a mate in the know...

Anyone wondering why the w140 has such a good sound system... The surprisingly small drivers are fitted to Bose tuned plastic enclosures which are ported at the bottom. Presumably they calculated the correct enclosure size and ports for the drivers along with port length? Not that different to...

Yep there’s no way they can breathe through this!

And I’m guessing that’s the reason why this one is so quiet even with NO mufflers??? Or could it also be due to the lower CR of a US version? Or poor audio on the recording? Do this on a Chev 427 & im sure you’d be rather deaf for some time.... https://youtu.be/ECoKrh5ueUg

That’s just criminal! Crazy considering the advertised performance aspirations of the model.

I still love this thread... interesting that my Ford is now quieter that when the exhaust was first installed. I’m not sure if it can be attributed to deposits coating the internal surfaces of the exhaust, or the loss of power since she’s now covered over 440k km (yes she’s tired now). Where...