[Yozh]

Do you know the details on those hybrids. Did they upgrade both turbos and both sides (compressor and turbine), ball bearings, thrust bearing, port/polish, billet compressor wheel?

[anielsen71]

This is how the dealer describes it

• Hybrid Turbos modified Hi flow compressor wheel
• Re-profiled compressor housing to suit
• 360 degree thrust bearing
• Modified turbine wheel blades to reduce backpressure
• Turbocharger fully blueprinted to motorsport standards
• Max Recommended Boost pressure: 24-26 PSI
• Actual Power Achieved: 333 bhp*

Can be found on www.hybridturbos.com
They also have hybrids for the 335i but not for the 335d

[Thecastle]

Originally Posted by anielsen71

This is how the dealer describes it

• Hybrid Turbos modified Hi flow compressor wheel
• Re-profiled compressor housing to suit
• 360 degree thrust bearing
• Modified turbine wheel blades to reduce backpressure
• Turbocharger fully blueprinted to motorsport standards
• Max Recommended Boost pressure: 24-26 PSI
• Actual Power Achieved: 333 bhp*

Can be found on www.hybridturbos.com
They also have hybrids for the 335i but not for the 335d

So basically a clipped turbine wheel which allows more exhaust flow but hurts spool, and possibly a new compressor wheel. Sounds like a pretty minor upgrade. Most of the time when I see modded turbos like this the gains are at best 10-30whp. Are their any big turbo options for this car?

Anyone retrofit a 550d Tripple turbo setup?

[anielsen71]

Originally Posted by Thecastle

So basically a clipped turbine wheel which allows more exhaust flow but hurts spool, and possibly a new compressor wheel. Sounds like a pretty minor upgrade. Most of the time when I see modded turbos like this the gains are at best 10-30whp. Are their any big turbo options for this car?

Anyone retrofit a 550d Tripple turbo setup?

Well if that is what you undstand from the description I gather you don't now much about turbos.....
And yes...only 80-100 hp gains but very smooth deliverance. It's on a 330d with OEM 231hp. A model unknown to the U.S. market....single turbo setup

[Thecastle]

Originally Posted by anielsen71

Well if that is what you undstand from the description I gather you don't now much about turbos.....
And yes...only 80-100 hp gains but very smooth deliverance. It's on a 330d with OEM 231hp. A model unknown to the U.S. market....single turbo setup

You assume a lot.... There is no modifying a turbo without a trade off. You clip the turbine, you get more flow out of the exhaust and reduce back pressure at the expense of spool. It's all a design balancing act there is no free lunch. My experience has been most modified turbos trade a higher boost threshold and increased lag for some flow gains at the top end ; but generally don't provide the same performance of simply going bigger. Some can be a good bang for the buck...

It good to see at least someone has a turbo upgrade, but it seems fairly expensive for a new compressor wheel, port, polish, and turbine clip. Does the price require a core exchange?

This thread started with the a uk twin turbo 335d making 400hp didn't see we shifted gears somewhere to talking about the the single turbo d my bad I'm looking for turbo upgrade options for some added power for my us 335d. I came from a big turbo GTI

Ps hybridturbos site doesn't seem to work for me.

[mob17]

Think Ecotune drops in hybrid turbos from Turbo Dynamics.

Yes its not cheap. But i think they do more than just replace the compresser wheel

[iaknown]

You will be seeing another hybrid turbo package available from a vendor here in the US very soon. We should have some dyno results within the next few weeks if all goes as planned....

[mob17]

Originally Posted by iaknown

You will be seeing another hybrid turbo package available from a vendor here in the US very soon. We should have some dyno results within the next few weeks if all goes as planned....

Now you tell me when i'm booked in

Anyways would be great to have another option for you guys with the US cars

[TDIwyse]

Originally Posted by iaknown

You will be seeing another hybrid turbo package available from a vendor here in the US very soon. We should have some dyno results within the next few weeks if all goes as planned....

Looking forward to these results. And the transmission mod results...

[iaknown]

Originally Posted by TDIwyse

Looking forward to these results. And the transmission mod results...

These are the last mods

[TDIwyse]

Yes!

[DWR]

Originally Posted by TDIwyse

Yes!

That's right. Say it with conviction.

[DWR]

Here's the piece that got me -
• Max Recommended Boost pressure: 24-26 PSI
Umm, how does this help?

[DWR]

Originally Posted by Thecastle

So basically a clipped turbine wheel which allows more exhaust flow but hurts spool, and possibly a new compressor wheel. Sounds like a pretty minor upgrade. Most of the time when I see modded turbos like this the gains are at best 10-30whp. Are their any big turbo options for this car?

Probably best if you look at the stock compressor maps. LP compressor is riding the choke line at the airflow needed to support 400Hp. The description mentions modified compressor housing in addition to the wheel. Your summarization appears to be inaccurate. Focus on the turbine partially misses the point, IMO. Agree with the potential spool up issue, but there is not going to be any free lunch with a bigger turbo.

Originally Posted by Thecastle

Anyone retrofit a 550d Tripple turbo setup?

It basically addresses the issues of the R2S system in our vehicles in a band-aid manner. Namely, the third turbo supplements airflow through the HP stage and water cooling the LP compressor housing helps get denser air out of the LP stage. Not sure this is a better option than 2 new turbos.

Bigger turbos certainly would work, but it appears there is ample evidence within this forum that the 400Hp mark can be achieved by other means, and at a lower cost. Now, if you want 450Hp, I think your choices narrow considerably and we need to start talking about transmission upgrades.

[mob17]

I want transmission upgrade options

[DWR]

Me too. Anyone make an adapter plate for manual trasmission, ha!

[Puerto Rican 335d]

Amigos our banned departed bastard child has FINISHED doing an upgrade on his tranny. Please contact him for more info

[Thecastle]

Originally Posted by Puerto Rican 335d

Amigos our banned departed bastard child has FINISHED doing an upgrade on his tranny. Please contact him for more info

I'd be interested in learning more about this as well. However, one thing that does come to mind when reading these threads....

No one specifies at what RPM they plan to make 400WHP. IF one wanted to make 400WHP near readline like you would in a big turbo setup anyway... Say at 4500rpm, then you'd only be throwing down 466lb-ft at 4500rpm. Well within the tranny's limits.

I'd suppose that a good tune could limit torque to keep it below 600lb-ft if the turbo was actually able to spool fast enough at low RPM's to exceed that level of torque.

[GreekboyD]

Originally Posted by Thecastle

I'd be interested in learning more about this as well. However, one thing that does come to mind when reading these threads....

No one specifies at what RPM they plan to make 400WHP. IF one wanted to make 400WHP near readline like you would in a big turbo setup anyway... Say at 4500rpm, then you'd only be throwing down 466lb-ft at 4500rpm. Well within the tranny's limits.

I'd suppose that a good tune could limit torque to keep it below 600lb-ft if the turbo was actually able to spool fast enough at low RPM's to exceed that level of torque.

Yep. I can't see the stock tranny being able to sustain 400 whp plus the torque over a long period of time. At some point you'd be looking at a tranny rebuild stronger than that of the stock one.

[DWR]

Originally Posted by Thecastle

No one specifies at what RPM they plan to make 400WHP. IF one wanted to make 400WHP near readline like you would in a big turbo setup anyway... Say at 4500rpm, then you'd only be throwing down 466lb-ft at 4500rpm. Well within the tranny's limits.

There is a particular indivdual who has quite a reputation around here for having an unsually fast car, and that is the exact strategy he has been using successfully.

[mob17]

Has anyone ever got 400whp?

[Thecastle]

Originally Posted by GreekboyD

Yep. I can't see the stock tranny being able to sustain 400 whp plus the torque over a long period of time. At some point you'd be looking at a tranny rebuild stronger than that of the stock one.

I would think 400whp at 4500+ rpm is actually less of an issue than most people think without risking transmission destruction. This is because Horsepower is just a derived number. hp=(torque*rpm)/5252

So the higher your rpm for a target hp, the lower the torque required to achieve it. You'd just have to ensure your tune dosent have a big torque spike down low.

So rentech and other tunes look like they could do 400whp safely with their flat torque curves, if we could just get enough air into these engines. Really the thing holding us back is just finding the right turbo upgrade. In fact if you had the right turbo setup I suspect we could do 400whp at 4500rpm and still keep the input torque on the tranny well below its 553lbft (26ztu/28) limit would be easy. Most big turbos have a higher boost threshold anyway so they aren't going to generate as much low rpm torque. We'd only need about 480lbft at the crank depending on the nonlinear losses to hit 400whp at 4500+ rpm

I have to admit this is my first conventional torque converter automatic car. I have had manuals and a few dsg cars. Are these transmissions that sensitive to failure when running Near their factory specified limits?