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AMG cams for 6.9?

Started by raueda1, 14 March 2020, 11:43 AM

s class

In short, the compression is 800 to 850kPa on all cylinders except number 2 which is about 500.

I have fitted new injectors and bench tested the fuel distributor, and it's perfectly balanced.  New ignition leads, spark is good. It runs with a flat miss.

Leak down test shows good sealing of valves and rings.  Checking the distance from spark plug hole to piston face at TDC is tricky and not very accurate, but what I could see convinced me the heads need to come off.

The rod would only need to be a millimeter shorter or less to have a significant effect on compression.


[color=blue]'76 6.9 Euro[/color], [color=red]'78 6.9 AMG[/color], '80 280SE, [color=brown]'74 350SE[/color], [color=black]'82 500SEL euro full hydro, '83 500SEL euro full hydro [/color], '81 500SL

s class

The telltale of Amg cars had been discussed before.  This one has some of the more generally accepted indicators, such as the lightened rockers, custom modified air cleaner with second cold air intake, Recaro seats, silberfiel steering wheel, sporr spec struts, long range 150litre tank


[color=blue]'76 6.9 Euro[/color], [color=red]'78 6.9 AMG[/color], '80 280SE, [color=brown]'74 350SE[/color], [color=black]'82 500SEL euro full hydro, '83 500SEL euro full hydro [/color], '81 500SL

s class

My car does not have cosmetics, or badgi g or Pentas, but I subsequently fitted 8x16 and 9x16 Pentas. .  The previous owner claimed a stage 2 cut on the heads, but I can't confirm that


[color=blue]'76 6.9 Euro[/color], [color=red]'78 6.9 AMG[/color], '80 280SE, [color=brown]'74 350SE[/color], [color=black]'82 500SEL euro full hydro, '83 500SEL euro full hydro [/color], '81 500SL

Mick74

This site claims 380hp, so maybe that's where he's getting his 100hp boost claim.

https://www.automobile-catalog.com/make/amg/w-116-amg/w-116-amg/1979.html

This site lists the same spec, but uses a photo of a Lorinser 116 rather than an AMG

https://fastestlaps.com/models/mercedes-benz-450-sel-6-9-amg

I remember reading that AMG offered 320bhp, 350bhp or 370bhp, although I can't find where I read that. The article claimed that, having paid over DM80k for your 6.9, you handed it and another DM50k to AMG and they performed said witchcraft. It may have all been a dream, though.
1979 6.9 #6475