Subaru Legacy GT 440XT Turbocharger versus Subaru WRX/STi 20G-XT Turbocharger - Subaru WRX Forum
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#1 Old 01-03-2014, 04:00 PM
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Subaru Legacy GT 440XT Turbocharger versus Subaru WRX/STi 20G-XT Turbocharger

I am about ready to upgrade my turbo with a TMIC. My power goals are between 450 and 500. Does not have be 450 or 500, just somewhere in between there. I am on the edge with buying one of these, but cannot commit. Does anybody have dyno numbers from these turbos? Any input/opinions/etc on these would be nice!
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#2 Old 01-03-2014, 06:14 PM
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Your gonna need something bigger than a 20g to make that kind of power, trust me I know first hand.
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#3 Old 01-03-2014, 11:48 PM
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Right now I have the supporting mods for a turbo upgrade in my 12 WRX. Hitting 335HP and 386TQ right now. Which turbo do you recommend for my power gains?
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#4 Old 01-04-2014, 12:22 AM
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A. Neither will do it assuming you mean whp and not crank. If you meant crank, go with the Legacy turbo because it will actually fit.

B. Those 2 turbos are not the same fitment

C. You need far more than you think you do for 450-500 whp. Built motor, built transmission, and a crap load of everything in between. Additionally, nothing about this will make for anything resembling reliability. A WRX making that much would not make a suitable DD. Hopefully you have another car. And a vast budget.

How much are looking to spend said and done? Plan on $30-35k in parts and labor for your goals. You will need to have further funds stashed for when stuff breaks, because it will.
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#5 Old 01-04-2014, 11:21 AM
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I appreciate the honesty. This is my DD. I drive it probably 4 miles a day. Bus stop is two miles away and takes me to downtown Denver. This will eventually become my project car in around two years. After two years I will have a new DD and keep this.

I have been stashing up for new gears and a built motor for awhile. It does worry me a lot about my tranny. I do not launch my car or abuse the crap out of it for that reason. I would feel MUCH better if I had a built motor and tranny IMO.

I was asking for advice on turbos because I want a solid plan to reach my goals and not buy a turbo and find out it puts out crap power. Thanks for the help!

On a side note how much does a rebuilt motor cost?
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#6 Old 01-04-2014, 11:33 AM
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In labor that is. The cost of labor on average
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#7 Old 01-04-2014, 03:04 PM
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Okay I'll cave with this one...Have you ever driven anything with that much power?

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#8 Old 01-04-2014, 03:33 PM
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On a side note how much does a rebuilt motor cost?
Depending on where in the 450-500 spectrum you want, $6-9k seems about average.
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#9 Old 01-04-2014, 04:52 PM
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brfatal, I called Mac Autosport. They have been working on my car since I bought it and they quoted me around 6500-7000k for a total motor build. Spot on sir.

psinuse, yes I have driven a car with 450hp. I do understand how quickly these cars can turn into animals. That is why I wait around six months before I add on more crap so I can get used to the power. I def. do not want 500 plus. That is just asking for trouble....

When it comes to cars I am a noob when it comes to turbos. Have no clue which one produces efficient power or less lag yada yada. Just need pointed in the right direction before I pull the trigger on anything. Thanks for all of your help though.
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#10 Old 01-04-2014, 05:11 PM
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Then your looking at a GT35 turbo to get in that power range. I would recommend going with a little bit lower compression than a standard 2.5L has to give you a bit of wiggle room. Tuning will be of utmost importance to keep that car running as it should. Pretty much any thing factory will need to be upgraded.

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#11 Old 01-04-2014, 05:30 PM
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Sweet! Here comes the long road of saving money......
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#12 Old 01-04-2014, 06:20 PM
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Sweet! Here comes the long road of saving money......
You have no idea...and I am sure a few others would agree. Granted I don't have as much money in my car as some do, I built my own motor, tune it myself and do most of my own labor, but I can say that even with that I have well over $15k in my car just in parts. I figure around $5k just in the motor.

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#13 Old 01-05-2014, 07:50 AM
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I have $35k in parts alone in my car can I don't even make the power he wants. I just haven't cheaped out on stuff, though short of my rods and trans being an issue, I could change that with just the turbo alone.
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#14 Old 01-05-2014, 08:28 AM
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I have $35k in parts alone in my car can I don't even make the power he wants. I just haven't cheaped out on stuff, though short of my rods and trans being an issue, I could change that with just the turbo alone.
Well I stuck with mostly stock internals and that saved me a bunch of money...probably 15% or more...

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#15 Old 01-05-2014, 09:33 AM
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Well I stuck with mostly stock internals and that saved me a bunch of money...probably 15% or more...
Did you save that? Or did you save that by switching to geico?


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