LandSeaAir

What's the point of this if you don't mind me asking?

DUDMD

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.

Ed954

Which coilovers did you order?

DUDMD

VVK
Everything fit fine, just not front sway bar yet as that's not been done yet.
The rear one uses W211 AMG links, so make sure sends you those and not W220 links like I got.

DUDMD

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.

Nor Cal SL55

#1 - Enjoy that car! (I know you will...)

l3iGD

Very nice work! What was your prior setup that was louder than this?
Thanks

Ed954

Got it, thanks. I'm dropping my car soon at SLR, so Sean can make the front ones for our cars.

Ed954

I really like that catch can setup. How much is it?
​​​​​

DUDMD

Mufflers very modified by previous owner, I then installed Speedriven 3" catless downpipes. Sounded great.

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.

DUDMD

Around $200 for the catch can, you can request 2 12an bungs and 2 10an, or all 12an's if you want. They come with 4 10an as standard order.

DUDMD

Here's the recent updates.
Tuned the car on the dyno, 13-14psi maxes out the fuel injectors near redline, so we turned it down to 12psi for now, 90% duty cycle on stock injectors at 12psi.
Best run of the day made 585WHP on my dyno dynamics, which is close to 650whp dynojet.

DUDMD

DUDMD

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.

alexanderfoti

Excellent work. I see it has shifted peak torque slightly further up the rev range.

DUDMD

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.

AMG-Driver

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.

alexanderfoti

Very true!

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?

BlownV8

Thanks for sharing. Interesting results. Any chance you can do an overlay of the stock hp/tq curve vs your new system?

DUDMD

Timing was not pulled by the ECU at all, I actually pulled 3 degrees of timing everywhere in boost, to keep it a bit safer over the already safe stock timing map. I'm sure I can go past 600whp on current boost/fuel, just by adding timing. This is a very safe tune, just to keep it a little on the extra safe side, while the stock turbo tuning I've done previously was more aggressive.

I can tune for bigger injectors later if needed, yes to run more boost on pump/race fuel.

DUDMD

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.

AMG-Driver

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!!!

DUDMD

Torque limiting might become a problem at some point. I turned up the limiter up a bit in the higher RPM, but transmission might have to have it turned off completely to be able to let it run it's course.

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.

BlownV8

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.

DUDMD

That's not a problem at all. The slightly lower power there won't affect it much, but yes, the eboost 2 allows to control boost by rpm. So I can add some extra boost at 4-5k rpm to bring the same hp/tq, but I will probably leave it like this at an even 12psi.

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.