Fitting a modern AMG v8 into a w126 SEC

[G560SEC]

Does one know which might be the least challenging modern AMG engine to fit into an SEC?

I’ve read a few threads which suggests it’s been done, but they are all quite old and seem to go dead before claiming success.

I was thinking the 55 Kompressor..

But it might be foolishly optimistic thinking.

 

[G560SEC]

the M113K was the one I was thinking to be specific.

 

[Will]

I’ve seen an M113 in a 111 coupé.

Anything is possible with enough time and (or!) money

Would a 126 chassis really benefit from 500hp though? They’re not exactly sports cars nor dynamic to drive.

 

[G560SEC]

It was the sound that I’m desperate for, not the performance. I just love the sound of the G Wagon. If I had a magic wand I’d try to recreate this..

Any ideas

 

[alabbasi]

You can get a much throatier exhaust sound by removing the kidneys from the exhaust system.

 

[G560SEC]

I’ve built a completely stainless system from the downpipe back and while it sounds awesome and unique on the standard 560 engine it’s not the same sound and doesn’t sound as refined or bassey.

no idea if I’m chasing an impossible dream. But the G Wagon sound (particularly the earlier ones) is what I’m aiming for.

 

[G560SEC]

I’ve built a completely stainless system from the downpipe back and while it sounds awesome and unique on the standard 560 engine it’s not the same sound and doesn’t sound as refined or bassey.

no idea if I’m chasing an impossible dream. But the G Wagon sound (particularly the earlier ones) is what I’m aiming for.

May well be worth trying to find an exhaust wizard in case they can recreate it. Although I suspect it’s something to do with the engine set up. Rather than some clever pipework mastery...

 

[Bobby Dazzler]

It’a certainly possible - as has been suggested already, if you have the resources then you will find a way - but it will be far from straight forward.

I would hazard a guess that it might be easier to remove the body from a car with the M113k engine and transplant the body from the W126 of your choice.

That would keep all of the electronics together and matched to the donor’a platform. I dare say that there might be other benefits of adopting a later platform.

 

[CarFan79]

First thing that popped into my head would be to ditch the Merc loom from the engine you want to use and have a custom loom made and stand alone management system

 

[jimjamiejames]

Just run it on megasquirt and you can put what ever engine you want where. There isn't that much that's required to make an engine run and if your transplanting it into something old there's not much integration to sort out.

 

[G560SEC]

That’s an interesting suggestion.

I’m surprised a generic engine management controller would be able to be compatible enough to run an engine as sophisticated as a mega AMG V8.

it’s maybe a bad sign that there seem to be so little cases of an engine like this being fitted to an old boy like the w126.

 

[G560SEC]

Is there anyone out there who could explain why the g wagon (much like the SL/E/ etc 55AMG engines) make such a unique and awesome sound? Like an automotive merlin spitfire engine.

 

[Petrol Pete]

Which G wagen are you listening to ? G63 with the pipes coming out from under the side sills or the first V8 from 1993.? Two very different engines/sounds

 

[Petrol Pete]

There is a company in South Africa that put's AMG engines in various vehicles, they have a Toyota Hilux pick up with an S63 engine in it .

 

[G560SEC]

Cool.
I was referring to the older ones. They were a bit louder and bassier than the modern ones which are probably more suppressed due to emission laws.

 

[jimjamiejames]

That’s an interesting suggestion.

I’m surprised a generic engine management controller would be able to be compatible enough to run an engine as sophisticated as a mega AMG V8.

it’s maybe a bad sign that there seem to be so little cases of an engine like this being fitted to an old boy like the w126.

Megasquirt is pretty sophisticated. I've got a jaguar straight 6 from an xjs running with it. Fully sequential coil on plug, individual throttle bodies from a BMW m3 wide band lambda. The engine will be going in a 70s daimler. Anything is possible just depends on time/money and if it will fit lol

Any old car with a big modern engine swap is cool as far as I'm concerned.

 

[Petrol Pete]

No , the older V8 ones had (I think) M117 engines then M113 V8's , the single overhead cam 3 valve/cyl M113 will always sound different to the G63 (M137 ?) engine. I am not sure if you could make an M113(K) engine sound very very different to the one you have at the moment , Zoomies ?

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[G560SEC]

Hey All,

I’m back with this crazy notion.

So I’m planning on buying a c63 (>2010 ish)

And fitting the engine, brakes and hopefully as much as possible to an SEC.

As mentioned previously. It’s not the performance, I’d happily tune it down to 3/400, it’s:

1. The noise that I want.
2. The fact it would be euro 4/5 compliant and wouldn’t be a problem with the London ULEZ

It’s a brave a foolish project. But I’d like something different and original. Also going to be fitting the Wide Body kit. Hopefully in exposed carbon fibre.

So. Please people any thoughts welcome.

A. Who would be able to fit the donor AMG engine and all its important bits into a 1990 SEC 560

B. Can anyone see / think of any major stumbling blocks in this plan

 

[jamesfuller]

Is there anyone out there who could explain why the g wagon (much like the SL/E/ etc 55AMG engines) make such a unique and awesome sound? Like an automotive merlin spitfire engine.

So many variables.
Doesn't the G have exhausts exiting in front of the rear wheels? Shorter exhausts are noisier.
Exhausts each side of the car, exhaust sound is now in stereo but the pulses are split each side.
AMG will have better flowing and equal length manifolds. (Never looked at a 560, but 500 and 420 vary a fair bit)
Exhaust material, stainless pipes can sound quite tinny and awful in some cases, to my ears, mild steel is always nicer.
Sometimes making something too loud will make it sound worse.
An engine built to perform will be lighter and better balanced, so will pick up and drop off quick, an engine built to cruise smoothly on mid range torque won't.
Camshaft lift and duration as well as timing can have a huge effect on sound, especially at idle, as can an X pipevor crossover as the exhaust pulses and scavenging effect are changed.

When I did one of my W126 I kept most of the O.E system including the kidneys, and just used mild steel to make a 2 into 1 rear pipe with no silencer. Still S class quiet at idle and cruising, just a bit more V8 rumble. When floored it made quite a noise, but sounded very nice. It certainly drew eyes away from a modern AMG or two when I left MB World.

 

[jamesfuller]

Hey All,

I’m back with this crazy notion.

So I’m planning on buying a c63 (>2010 ish)

And fitting the engine, brakes and hopefully as much as possible to an SEC.

As mentioned previously. It’s not the performance, I’d happily tune it down to 3/400, it’s:

1. The noise that I want.
2. The fact it would be euro 4/5 compliant and wouldn’t be a problem with the London ULEZ

It’s a brave a foolish project. But I’d like something different and original. Also going to be fitting the Wide Body kit. Hopefully in exposed carbon fibre.

So. Please people any thoughts welcome.

A. Who would be able to fit the donor AMG engine and all its important bits into a 1990 SEC 560

B. Can anyone see / think of any major stumbling blocks in this plan

I don't think it's the engine side of things that will be too bad, I think getting the gear box working with standalone management Willbe the hardest part. You will most likely need to change diff ratios.

If the London LEZ thing is a major reason for this conversion, make sure it can actually be recertified. I'm not sure on how or if it can be done, just because the engine meets a standard in a C63 doesn't mean it will when lugging a C126 around, and I'm guessing by previous comments it won't have a full compliment of C63 Cats, and won't be mapped the same on standalone management.

If you need bigger wheels to go over upgraded brakes, Image wheels make an AMG Penta style split rim in custom sizes.