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Twin Scroll T3 turbo options

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Thanks! Not sure why I couldn't get anything to show up....what a/r do you recommend for a 35r sized turbo on a ts t3?
 
From what I've seen, a rule of thumb would be that a twin scroll housing would be equivalent in power to an open housing of the same family that is .8x the AR and response is equivalent to something .6x. So the 1.0x Garrett divided T3 housings in the links above would be comparable to the power of an open .82 with the response of the .63. They do have smaller options if you wanted to focus on more response but at that point you're sacrificing power and you could just do an FP bolt-on and save a bunch of money.
 
Twin-scroll T3 is starting to become a restriction at the +/- 600whp level. It has nothing to do with the size of the turbine wheel or housing a/r; at some point the housing just can't physically flow enough exhaust through the flange. This is why your big-power turbos are either single-scroll T3 or twin-scroll T4....at some point you have to trade quick spool for horsepower.
 
Twin-scroll T3 is starting to become a restriction at the +/- 600whp level. It has nothing to do with the size of the turbine wheel or housing a/r; at some point the housing just can't physically flow enough exhaust through the flange. This is why your big-power turbos are either single-scroll T3 or twin-scroll T4....at some point you have to trade quick spool for horsepower.

Crap. I am going HX40 on my auto awd sometime in the future and have been having a hard time deciding between t3 or t4 divided. T3 seems to be easier to find, but your statement above just pretty much made my decision for me. I'm going to have to cough up the money for a t4 if I can find one.
 
I have thought about using the 351vgt and the Lil black box to control it. I just don't like the prices anymore on those turbos. Used to sell for $200 or less all day but prices skyrocketed now that everyone is retrofitting them.
 
He351ve has no chance of fitting in a DSM and keeping the actuator, unless you do some drastic shit. The Garret actuator is far more robust and easier to control. I'm running it with a stock ECU. The holset turbine is probably more efficient though.
 
Should have posted an update...I bought a ts t4 forward facing setup at the shootout. I appreciate all the responses though! Hopefully it'll help someone down the road.
 
He351ve has no chance of fitting in a DSM and keeping the actuator, unless you do some drastic sh**. The Garret actuator is far more robust and easier to control. I'm running it with a stock ECU. The holset turbine is probably more efficient though.

It's already been put on a 2g. And either way, whether I go 351ve or hx40, i'm having a custom manifold built.
 
I don't have A/C, so that's not a concern for me. The point was, as with all things car related, where there is a will there is a way, and as such, the 351VE has been put on a DSM. I don't know if I am going that route or not, but I don't doubt that if I do decide I want to go that direction, it can be done.
 
I see your point. I wasn't ready for a half radiator and everything related to that, so I went the garret route. I might still try a holset, but it will probably be one of the bigger ones, as I don't think a 6060 (he351) is going to do it for me.

Do you have anymore info on the HE351ve car? I'd like to see how it works, as that's probably the only other active vgt car out there.
 
When last I saw, the owner was still working out the code to control it on his particular application. There are a few other applications using them as well using Curtis' kit, which pricewise blows the competition away. If I go that route, I'll be using Curtis' Lil Black Box to tune it. (Hopefully I don't get banned for using his name here, Lulz).
 
Here's an older thread on the topic....looks like this one's behind a stock rad to boot. :D

http://www.dsmtuners.com/threads/holset-he351-vgt-is-goin-on-my-car.323774/
The thing with that is, notice he isn't using the stock electronic VGT controller. That was jimmy rigged with a mechanical actuator. I believe there would be significantly less space when utilizing the electronic controller. I'm not saying there wouldn't be enough space to use the stock radiator; that I can not speak to, only that it would most likely make things tighter.
 
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