AMG-Driver

Is -34 degrees of timing a misreading? This is not healty timing at full throttle in high revs. You can not expect the little turbos/housing to go healthy with any increase of air and boost you throw at them...

Ekselent

I have reached this conclusion by following the dyno curve and daschcomand info when we dynoed the car. The DYNO AF ratio "sensor" was broken when we dynoed the car.
I do not have any other tools for this.

Here is my dyno at Dyno Dynamic. I made 3 runs and al the runs where fine. Gave nearly the same power band each run. +- 4 kW.

Best power 725 hp at 5250 rpm. Best torque 927 lbft at 2750 rpm.
The boost drop lineary from 22psi 2750 to 13psi at 5600 rpm.
As you can se at the dyno chart the power start to drop at 4600 rpm. The timing is all the way from the start between -3-0-7 to 4600 rpm / 1,2 bar. At 4800 rpm / 1,18 bar when the power curve is start to going up again the timeing is-10. After that its change the timeing to -34 and the power rice to 725 hp at 5250 rpm. Boost 0,9 bar. The intake temperature is stately al the way at 106 F. ( Hood is open).

So the boost have nothing to do for the power drop at 4600-4800 rpm. The only thing its change it's the timing.
So I think its runing to lean? Or something another thing is wrong?
I have made lot of own intake modification al the way to the throttle flap. Own CAI also from the front of the HE. 3" al the way to the turbo intake side. Its helped a lot. 927 lbft at 2750 rpm. The best torque point drop nearly 1000 rpm's. From 3750 rpm to 2750 rpm.

The car is strong.
I use pump gas 98 okt.
The AFR “sensor/at the muffler" was broken so we couldn’t read it. Sorry.

Im sure I have more than 725 hp.

200 km/h = 4600 rpm the power curwe going down ( 2750 rpm timing al the way -3-0-7 to 4600 rpm)
215 km/h = 4800 rpm the power curwe rice again ( at this point its change the timing -10 to -34 to the top power 725 hp at 5250 rpm.
Im pretty sure the engine start to knock at 4600 rpm because the its start run to lean.

Ekselent

I don't know if the timing is misreading. Only thing I know is that the power curwe drop at 4600 rpm and at 4800 rpm its start to rice again. Boost is linear dropping and the intake temperature is al the way same 41C / 106 F.
Its change only the timing. So to problem must be the fuel.

AMG-Driver

Do you have a timing curve across the rev-band during dynorun?

Ekselent

Yes I have.
This Dashcomand read it directly from my car OBD port so it must show right.
Same dyno run as the dyno chart show.


You can see everything from here. Speed and rpm also + timing and boost and intake temperature.

AMG-Driver

The problem is you have 5 values shown and obd2 port is too slow to give accurate live data. From what I see the -34 are shown when your dyno run is over. Your tune seems to have strategy much boost early and not much timing advance. I would highly recommend to measure AFR with your next Dyno to check if it gets enough fuel. Good luck!

Ekselent

Hello.

Today I had a chance to install the "old" model of headlight. Many of you have wondered is there space enough for the 3" CAI tube. Yes there is space enough. As much as the facelift headlight has. No problem at all so my CAI system fits also SL65AMG / SL600 and CL65AMG / CL600 with the old style head lights.
Maybe all 55AMG's also.

Ekselent

Yes, I must do that. Marcin/Speedriven answer me also and asked me to do that so he can see if there is fuel problem.
His opinion was that the fuel should the suffices.

Ekselent

Test fit.
Its very tight but its there . 3" Carbon fiber pipe al the way.
No big heat soak problems anymore.
Soon ready.



Right side.


Left side.

Ekselent

Finally the new HE exchanger has been installed.
I love the look.. I think this is the best place for the exchangers. No heat from the engine. So now I have 3 HE at my car. Very interesting too se how much suction temperature drops. It was very tight everywhere. No space at al. I had to do new engine oil hoses also because it was so tight. But I think these places are the best place to install the HE. No heat from the engine at al.

Ekselent

Well.
Now they are pre-installed. I changed to better hoses. It looks great.

Ed954

Looks good. What brand is that?

Ekselent

Thank you. TRR Finland.