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W202 OM606 GT2359v+Pro52
erx Online
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RE: c220d om606 taxiSTD
Here's one video of how it spools, I use 2.47 diff at the moment so with 3.xx ratio it would spool even faster. As you can see it makes only one stripe, so next I need to improve differential. Last year with 2.47 diff and huge hx52 it spooled at so high speed that it was almost driveable with opened diff but not anymore.

https://www.youtube.com/watch?v=1ouEP8jq...e=youtu.be

And for comparison the same PRO52 but single turbo setup. Biturbo makes so big difference.

https://www.youtube.com/watch?v=NbShuHhQq6k
10-24-2017, 03:10 PM
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Turbo Offline
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RE: c220d om606 taxiSTD
10-26-2017, 02:27 PM
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erx Online
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RE: c220d om606 taxiSTD
First time on drag strip this year. Same biturbo setup and no upgrades on engine side, this time welded 2.65 diff instead of opened 3.27 that I used last year. It was slippery like always but this time there was strong wind right in front so final speed wasn't that good like it should have been, still little under 200kph. Best result was 60ft 2.18, 660ft 8.14/157.36kph and ET 12.13/198.6kph. Slowly getting better with my sleeper. Engine and gearbox are still both unopened.




(This post was last modified: 04-24-2018, 01:41 PM by erx.)
04-24-2018, 01:39 PM
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atypicalguy Offline
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RE: W202 OM606 GT2359v+Pro52
Seems like the 2.65 is a good ratio!

Some questions if you do not mind: 

1. Are you bypassing the small turbo entirely at high rpm, or is it still working? 

2. how big is the small turbo compressor?

3. how big are the bypass wastegates?

4. What rpm does it spool? 

5. Have you measured any backpressure?

You are spooling almost immediately in the last drag video. Looks great! Fantastic results.
(This post was last modified: 05-16-2018, 02:09 AM by atypicalguy.)
05-16-2018, 01:17 AM
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atypicalguy Offline
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RE: c220d om606 taxiSTD
(06-13-2016, 07:50 AM)Petar Wrote: Note that chart is likely made for a gas engine and a diesel will certainly move more air per hp. How much i don't know but i would estimate 20-30% more

Yes but are not the gas temperatures far higher for the petrol motor? So the volume of gas might be greater for the petrol motor,  even though the mass flow of the diesel is higher. Back pressure from exhaust would correlate with volume, not mass, flow rate.
05-16-2018, 01:22 AM
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erx Online
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RE: W202 OM606 GT2359v+Pro52
(05-16-2018, 01:17 AM)atypicalguy Wrote: Seems like the 2.65 is a good ratio!

Some questions if you do not mind: 

1. Are you bypassing the small turbo entirely at high rpm, or is it still working? 

2. how big is the small turbo compressor?

3. how big are the bypass wastegates?

4. What rpm does it spool? 

5. Have you measured any backpressure?

You are spooling almost immediately in the last drag video. Looks great! Fantastic results.

1. At high rpm it is bypassed because it's so small compared to pro52.

2. 
GT2359V - MB OM613, OM648, 
Compressor
Inducer: 44.4mm
Exducer: 59.4mm
12 blades
55 trim
.51 A/R
Turbine
Inducer: 51.2mm
Exducer: 47mm
9 blades

3. 60mm

4. It spools instantly as you can see from video. If I hold brake and throttle it will spoolup and spin wheels almost instantly, even with 2.65 diff.

5. All the time, small turbo vgt is actuated by comparing boost and egp. At 3.5bar boost egp is 4.2bar.
(This post was last modified: 05-16-2018, 04:54 PM by erx.)
05-16-2018, 04:53 PM
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atypicalguy Offline
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RE: W202 OM606 GT2359v+Pro52
(05-16-2018, 04:53 PM)erx Wrote:
(05-16-2018, 01:17 AM)atypicalguy Wrote: Seems like the 2.65 is a good ratio!

Some questions if you do not mind: 

1. Are you bypassing the small turbo entirely at high rpm, or is it still working? 

2. how big is the small turbo compressor?

3. how big are the bypass wastegates?

4. What rpm does it spool? 

5. Have you measured any backpressure?

You are spooling almost immediately in the last drag video. Looks great! Fantastic results.

1. At high rpm it is bypassed because it's so small compared to pro52.

2. 
GT2359V - MB OM613, OM648, 
Compressor
Inducer: 44.4mm
Exducer: 59.4mm
12 blades
55 trim
.51 A/R
Turbine
Inducer: 51.2mm
Exducer: 47mm
9 blades

3. 60mm

4. It spools instantly as you can see from video. If I hold brake and throttle it will spoolup and spin wheels almost instantly, even with 2.65 diff.

5. All the time, small turbo vgt is actuated by comparing boost and egp. At 3.5bar boost egp is 4.2bar.

Thank you for the detailed responses. 

That is a nice back pressure ratio!

Do you control the 60mm wastegates with a solenoid valve, or with direct pressure? And do you use large turbo pressure to hold the gates closed a bit?

And are you using the Ole Fejer controller to control the vgt actuator? I suppose it can do the math comparing the boost and backpressure. 

I never considered using EDC or vgt, but your setup shows what is possible in compound 606 builds now with aftermarket controllers. Very nice work.
05-17-2018, 12:42 AM
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erx Online
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Posts: 307
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Location: Estonia
RE: W202 OM606 GT2359v+Pro52
(05-17-2018, 12:42 AM)atypicalguy Wrote:
(05-16-2018, 04:53 PM)erx Wrote:
(05-16-2018, 01:17 AM)atypicalguy Wrote: Seems like the 2.65 is a good ratio!

Some questions if you do not mind: 

1. Are you bypassing the small turbo entirely at high rpm, or is it still working? 

2. how big is the small turbo compressor?

3. how big are the bypass wastegates?

4. What rpm does it spool? 

5. Have you measured any backpressure?

You are spooling almost immediately in the last drag video. Looks great! Fantastic results.

1. At high rpm it is bypassed because it's so small compared to pro52.

2. 
GT2359V - MB OM613, OM648, 
Compressor
Inducer: 44.4mm
Exducer: 59.4mm
12 blades
55 trim
.51 A/R
Turbine
Inducer: 51.2mm
Exducer: 47mm
9 blades

3. 60mm

4. It spools instantly as you can see from video. If I hold brake and throttle it will spoolup and spin wheels almost instantly, even with 2.65 diff.

5. All the time, small turbo vgt is actuated by comparing boost and egp. At 3.5bar boost egp is 4.2bar.

Thank you for the detailed responses. 

That is a nice back pressure ratio!

Do you control the 60mm wastegates with a solenoid valve, or with direct pressure? And do you use large turbo pressure to hold the gates closed a bit?

And are you using the Ole Fejer controller to control the vgt actuator? I suppose it can do the math comparing the boost and backpressure. 

I never considered using EDC or vgt, but your setup shows what is possible in compound 606 builds now with aftermarket controllers. Very nice work.

I use two solenoids for bypass wg-s to control both upper and lower chambers. Bypass is 100% opened when full load. VGT is controlled by Ole fejer controller.
05-19-2018, 07:07 PM
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