This. This right here. So much want. By the way, how is the upgraded TC versus stock?

 

The TC is my 3rd fav upgrade on the car. The lug from the heavy TC is gone since Level 10 is half the weight. Acceleration picks up much faster and you get a good pickup throughout the powerband. The shifting speed is noticable since my car jumps almost a car just between shifting 1st and 2nd due to higher stall speeds on the TC.

I do have my original TC if you need a core to send in to upgrade Asking $500

 

Do you use Meth/Water injection?

This is the OEM '13 turbo? Or aftermarket manifold setup?

 

No, I have a friend who has a meth tuned Gen. Mine was intended to be as fast w/o meth and is currently faster even w/o retune.

It's a stock 2013 housing that has been machined out to fit the larger compressor wheel. Other than that, everything is stock fitment. I am considering getting a stock exhaust manifold to port out to see what that does though.

 

Nice upgrade you got there.

Who did the machining and can you share how much it costs?
Is that a billet wheel?
Does it push past 5k rpm?

 

Thanks

I got it done by Nick at https://www.facebook.com/DukeCityTurboBricks?fref=ts he's having a special right now so I'm not sure what's the current price, I paid $200 tho. He's pretty much been the only person I've come across that does this and he can bored out BK1 housings too.

Yes, it's a 20T 6+6 billet
Yes, my original tune capped me at 20.3psi. Via TorquePro, my max boost is 22psi now w/ AFR of 10.48
I combined this with 9 fin wheel to create a characteristic of crazy high end at the cost of reduced low end torque. The faster you go, the harder the car pulls, all high end

 

Ohh yes, I'm very interested in this. The exhaust side is all one piece? But the actual turbo central part and compressor housing are removable?

Curious if assemblies are balanced as one or individually?

There a vendor that would do a kit with machined housing with wheel?

 

Yes, it's possible to remove the CHRA and Compressor housing while leaving the exhaust manifold on the car. It would be the easiest way to do this mod.

The parts are individually balanced and have a mark, but there was a local shop that did it for $35, so what the heck. It was slightly off the mark on both parts so maybe it was a good thing I got it balanced? If I just based it off the markers tho, it would have been close.

Duke City Turbo (posted their FB page above) will do everything for you for $700, Machining, 20T billet compressor wheel, CHRA rebuild, 11 fin turbine and assembly. He will provide 9 fin at your request with a slight upcharge since it costs more. Our stock is 11 fin, but the MHI 11 fin won't choke as much as stock on the high end and you won't get the 500rpm boost lag like the 9 fin...but 9 fin holds boost much higher on top end, so really up to you what your preferences are.

 

Haven't dived into the turbo on this yet. But that's the next step

 

Great mod.
I recently did just billet wheel upgrade, it was a little larger than stock but still did fit in stock housing without need to machine it + Billet Wheel was 33% lighter that stock.
I returned my car and it is now pushing 1.8 bar = 26PSI.

I'm also automatic + I have meth injection. haven't dynoed my car yet....

Very interested in torque converter.
Is it possible to retune software of TCU at Level 10? for faster and crisper shifts?

 

So did you go with the 5+5 19T? Or the GTX?

You would get faster crisper shifts from torque converter alone, but if you wanted even more, you'd have to send in your valvebody for them to widen the passages and open some shortcuts for the fluids. But since we can't hack into our TCU, we can't raise the shift points or make the transmission hold gear hence me only doing the TC. It's enough to get you a 1 car jump running against someone w/ stock TC shifting from 1st to 2nd.

 

Enjoy the vid

https://youtu.be/zhxsA5jw0mo

 

I'm assuming a custom tune would be needed after any compressor wheel change to match the new flow of the turbo but not required immediately as long as you keep it out of boost up top so it doesn't go BOom.

Or would a previous canned or custom tune self adjust for the increased output in the higher RPM's?

 

A custom tune would be most beneficial. I'm currently running on a custom tune I got when I still had the primary on so this is a "mild" tune for sure. Via TorquePro, I'm currently running 22psi w/ AFR of 10.48 so, while it's a bit rich, it won't go boom

 

What about timing? With my Stage 1 canned tune as my boost drops off my timing increases towards redline. If you aren't loosing boost like I am and your tune is increasing timing I would think that that could lead to some issues.

 

I'm not sure how canned vs custom will handle this. My tune should be considered mild tho since it had the cat while it was being custom tuned so I probably have room even if the tune advances the timing later on. Just waiting for BTR to come back and get a custom retune

 

This is super exciting progress that keeps the computer happy and the motor looking factory!

 

nice pull.
I'm very curious what kind of power will you put down with 20T.

can you post acceleration video of your speedometer? to 30-100mhp or something like that. would like to compare to my 26PSI Billet 19T (5+5) + Meth...



BTW, why didn't you go with 11+0 GTX Style 20T?

 

I'll try to get a better video.

What numbers are you putting down w/ the 5+5 and 26psi?

The 11+0 GTX works better on bigger turbos but don't work as well with the smaller ones like TD04. The 6+6 moves the most air for TD04.

 

You really made me think to do turbo upgrade again.
I don't want to mess with manifolds and disabling EWG... So only option is upgrading wheels.

I'm afraid I wont get much improvement from going from billet 19T to billet 20T, is there any other larger wheels that can be machined to in our TD04 housing?

I also was thinking about GTX Style 20T but found out that it has balance issues with 9 blade turbine wheel, it doesn't relate to your 6+6?

 

The problem is 2 folds, intake and exhaust sides both need to be worked on. The stock manifold really doesn't flow all that well, you may notice you're faster at 95% throttle than 100%.

The 20T is the biggest for the TD04 series unfortunately, but even theoretically, if you were to put in 1 size larger like 18G, there wouldn't be enough flow in the stock exhaust manifold to make the higher level boost anyways.

I'm not sure of what balancing issues, supposedly the 20t+9 fin is the highest HP combo. I did get them balanced together so not sure if that'll help. My understanding is that the GTX 11+0 turbines don't work as well in the TD04 sizes.

I'd appreciate some links to stuff you've read if you don't mind. I haven't come across any articles regarding balancing issues with this setup.

 

I'm going to bump this up since I've been interested in running a setup like this. Did you ever get re-tuned for this upgrade? It would be interesting to see the dyno graphs side by side. Then we could see if there is any substantial difference in spool time on the 11 vs. 9 blade.

edit: I also noticed the guy that was claiming there is balance issues used the 11+0 compressor not the 6+6