SL55/63/65/R230 AMG: DUDMD - SL65 AMG V12T - Single Turbo Conversion Build
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Joined: Jun 2013
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2005 SL65 AMG, 04 S600
What's the point of what?
Single turbo conversion?
So that I can make more power with less boost than factory turbos that were maxed out, and have extra room left with the turbo for more power if want to push it more.
It will also shift the power band up higher where it's beneficial.
Single turbo conversion?
So that I can make more power with less boost than factory turbos that were maxed out, and have extra room left with the turbo for more power if want to push it more.
It will also shift the power band up higher where it's beneficial.
Thread Starter
Member
Joined: Jun 2013
Posts: 148
Likes: 21
2005 SL65 AMG, 04 S600
Thread Starter
Member
Joined: Jun 2013
Posts: 148
Likes: 21
2005 SL65 AMG, 04 S600
I've been a bit lazy lately, but would like to finish this project in the next few weeks. Will have videos and dyno results soon.
Here's a few pictures you guys haven't seen before:
Speedfactory custom catch can. 2 of -12an and 2 of -10an that get capped off.
VVK R230 Coilover set I got from Sean, still awaiting for the V12 front sway bar to be built.
Rear R230 VVK Sway bar that is complete and installed
Rear coilover installed
UPD toe arms, UPD camber arms, VVK rear sway bar, VVK coil over
Ready for alignment.
Here's a few pictures you guys haven't seen before:
Speedfactory custom catch can. 2 of -12an and 2 of -10an that get capped off.
VVK R230 Coilover set I got from Sean, still awaiting for the V12 front sway bar to be built.
Rear R230 VVK Sway bar that is complete and installed
Rear coilover installed
UPD toe arms, UPD camber arms, VVK rear sway bar, VVK coil over
Ready for alignment.
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Joined: Apr 2016
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From: Miami, FL
R230
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Thread Starter
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Joined: Jun 2013
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2005 SL65 AMG, 04 S600
The new sound now is just amazing, sounds very smooth and clean compared to before. Actually sounds like a v12 now, vs oddball unique sound on stock manifolds/turbos.
Thread Starter
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Joined: Jun 2013
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2005 SL65 AMG, 04 S600
Thread Starter
Member
Joined: Jun 2013
Posts: 148
Likes: 21
2005 SL65 AMG, 04 S600
Thread Starter
Member
Joined: Jun 2013
Posts: 148
Likes: 21
2005 SL65 AMG, 04 S600
Couple of dyno graphs, don't mind the 4k rpm craziness. It happens every pull with this transmission/torque converter ever since I owned the car. It has also done over 200 dyno pulls now since I got it about a year ago.
Currently only thing 2 things are holding it back. Stock fuel injectors are at 90-95% duty cycle at redline and spark plugs have not been changes since I've had it. No misfires yet, but will probably need to be replaced and gapped tighter for more boost.
Turbo spools up great, can have full boost by 3k rpm if needed, and no diying down at top end. Easily has another 200-300whp in it, but needs race fuel and possibly built trans to get there.
Currently only thing 2 things are holding it back. Stock fuel injectors are at 90-95% duty cycle at redline and spark plugs have not been changes since I've had it. No misfires yet, but will probably need to be replaced and gapped tighter for more boost.
Turbo spools up great, can have full boost by 3k rpm if needed, and no diying down at top end. Easily has another 200-300whp in it, but needs race fuel and possibly built trans to get there.
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Joined: Jun 2013
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2005 SL65 AMG, 04 S600
It will now be an even more dangerous hwy killer from a roll, and easier to launch with less torque at low rpm.
To me, this is a perfect powerband for a performance car, I hated the stock powerband of all tq down low and dying off up top without much options to improve the high rpm.
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Joined: Oct 2004
Posts: 471
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From: Germany
SL65 R230
Very Nice, congrats for the first dyno runs! 
Have you seen timing being pulled with the single turbo, because you see the need of race fuel? Have you already made a run with race fuel?
With stock turbos you did 540whp on your dyno and 602whp with race fuel.
Do you think you can tune your ECU and fuel system for bigger injectors?
Keep the videos coming from driving on the road. Can't wait to see the "single turbo" in action on the street.
Have you seen timing being pulled with the single turbo, because you see the need of race fuel? Have you already made a run with race fuel?
With stock turbos you did 540whp on your dyno and 602whp with race fuel.
Do you think you can tune your ECU and fuel system for bigger injectors?
Keep the videos coming from driving on the road. Can't wait to see the "single turbo" in action on the street.
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Joined: Mar 2010
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From: London UK
2013 W204 C63 AMG, 2008 W221 S65 AMG
The whole powerband got shifted up. The engine can now finally breathe out the exhaust too, even though it's restrictive before the turbo, the headers are more closer to equal length now. That changed the sound a lot towards the better, and the flow improved at high rpm.
It will now be an even more dangerous hwy killer from a roll, and easier to launch with less torque at low rpm.
To me, this is a perfect powerband for a performance car, I hated the stock powerband of all tq down low and dying off up top without much options to improve the high rpm.
It will now be an even more dangerous hwy killer from a roll, and easier to launch with less torque at low rpm.
To me, this is a perfect powerband for a performance car, I hated the stock powerband of all tq down low and dying off up top without much options to improve the high rpm.
The stock engine is odd, you feel like there is no point in revving it to redline. It drives very much like a diesel!
Does that mean stock injectors are at 90% with stock turbos at max WHP too?
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Joined: Jun 2013
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2005 SL65 AMG, 04 S600
Very Nice, congrats for the first dyno runs!
Have you seen timing being pulled with the single turbo, because you see the need of race fuel? Have you already made a run with race fuel?
With stock turbos you did 540whp on your dyno and 602whp with race fuel.
Do you think you can tune your ECU and fuel system for bigger injectors?
Keep the videos coming from driving on the road. Can't wait to see the "single turbo" in action on the street.
Have you seen timing being pulled with the single turbo, because you see the need of race fuel? Have you already made a run with race fuel?
With stock turbos you did 540whp on your dyno and 602whp with race fuel.
Do you think you can tune your ECU and fuel system for bigger injectors?
Keep the videos coming from driving on the road. Can't wait to see the "single turbo" in action on the street.
I can tune for bigger injectors later if needed, yes to run more boost on pump/race fuel.
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Joined: Jun 2013
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2005 SL65 AMG, 04 S600
I maxed them out before as well, more boost even from smaller turbos will max out the injectors/fuel pump sooner than a larger turbo with less boost.
Senior Member
Joined: Oct 2004
Posts: 471
Likes: 33
From: Germany
SL65 R230
Very impressive with only 12 PSI. This shows that the stock turbos are producing a lot of hot air and are not effective in the high rev-band.
You made the first steps in the right direction. If it was my car I would now push the turbo into new terrain and leave all other 65s in the dust, if torque limiting will not become a problem. GOOD Luck!!!
You made the first steps in the right direction. If it was my car I would now push the turbo into new terrain and leave all other 65s in the dust, if torque limiting will not become a problem. GOOD Luck!!!
Thread Starter
Member
Joined: Jun 2013
Posts: 148
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2005 SL65 AMG, 04 S600
Very impressive with only 12 PSI. This shows that the stock turbos are producing a lot of hot air and are not effective in the high rev-band.
You made the first steps in the right direction. If it was my car I would now push the turbo into new terrain and leave all other 65s in the dust, if torque limiting will not become a problem. GOOD Luck!!!
You made the first steps in the right direction. If it was my car I would now push the turbo into new terrain and leave all other 65s in the dust, if torque limiting will not become a problem. GOOD Luck!!!
For now I'm happy with it's output at just 12-13psi, drove it on the street today and it breaks the tires loose way easier now and pulls harder than I remember it being half a year ago.
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E55, GLS450, GL63, GLE350
This image is a little crude but you get the idea. This is a transparency of the dual vs the single turbo. Looks like you may need to increase the boost substantially to make up for the huge loss of power in the lower end.
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2005 SL65 AMG, 04 S600
Anything under 4k rpm I could care less about, as it's useless to have a ton of power down there and only causes extra torque wear on the transmission at lower rpm.
