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Old 01-17-2005, 08:44 AM   #1
hotrod
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Location: 13.239@102.85 @ 5800 ft on 13T
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Default Appears stock turbo is 13T not 13G

The subaru community has believed (myself included) for a long time that the stock turbo on the WRX was a TD04L-13G. This was based on statements made by well respected members of the community back in early 2002 when the car first came out.

The DSM community has been refering to it as a 13T for quite some time now, and since I just recently pulled my stock turbo off, I just pulled the compressor cover and measured the compressor.

According to compressor dimensions published on :
http://www.stealth316.com/2-turboguide.htm

The compressor impeller measures out as a 13T, not as a 13G.

My compressor measures 2.205 inches at the max diameter across the impellers, (exducer dia) compared to the expected 2.203 inch max dia on a 13T impeller.

The minimum dia across the impellers (inducer diameter) measures 1.599 inches compared to the expected 1.597 inches for a 13T impeller.

This shows a consistant bias of +.002 on the measurements ( using a very old vernier caliper that has not been calibrated in 25 years.

It looks to me like we need to begin the long process of changing the urban legend that this is a 13G impeller because mine at least certainly measures out as a 13T.

I suspect the basis of this is it is nearly impossible to find a compressor map for the 13T, and folks used the nearest thing they could find, and it took on a life of its own.

FWIW

Larry
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Old 01-17-2005, 09:27 AM   #2
Unabomber
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Thanks for the info Larry. If there is one member of NASIOC I wish we could bottle up in sell in stores, it would be you.
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Old 01-17-2005, 04:09 PM   #3
hotrod
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Default

Just found an industry part listing by Mellet that list identification measurements for the Mitsubishi turbos.

http://www.melett.com/pdfs/MHI/Mhi%20TD04.pdf

My measurement are exactly as specified in that catalog

It specifies for the 13T, measurements of:
56.01 mm dia exducer = 2.20511 inches vs my 2.205
40.64 mm dia inducer = 1.59999 inches vs my 1.599

Catalog date 3/04

Larry

Last edited by hotrod; 01-17-2005 at 04:22 PM.
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Old 01-17-2005, 09:36 PM   #4
Uncle Scotty
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Would it be possible for a stock TD04 to be an 'H' and not an 'L' ??? And what is THAT difference????
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Old 01-17-2005, 10:40 PM   #5
AlucardR
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What does Subaru say regarding this? I think an answer right from them would be the most accurate.
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Old 01-18-2005, 02:50 AM   #6
DumbUglyDragon
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Haha - that took a while!
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Old 01-18-2005, 06:57 AM   #7
hotrod
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After comparing notes with jlevy I'm down grading my "guess" of the turbos flow to the range from 385 - 410 CFM, but it is still a guess.

As far as the H vs L --- I have no clue. Frankly I have better things to do than try to use my psychic skills to figure out what the "pro's" should have made public back in 2003 when they knew what this turbo really was.

I have very little patience with the turbo industry's super secret info mentality. Like most folks, on these forums I trusted the folks that started the speculation about the compressor being a 13G would correct the community if/when they learned otherwise.

Of course the draw of selling $900 dollar IHI turbo's that are hardly better than the stock turbo, seems to have won out over ethic's.

Larry
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Old 01-18-2005, 08:23 AM   #8
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I agree Larry. Though I'm not a real old school here, I remember the days when it took an aftermarket turbo to break into the 12s. Even thinking you could do so with a stock turbo was unpossible in many people's minds. I also agree about the turbo info. I sandblasted a Garrett rep in OT the other day about it. It netted me a couple of new compressor map links to add to my Turbo FAQ and the promise that they aren't going to sit on them anymore.
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Old 01-18-2005, 03:02 PM   #9
quazimoto
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Quote:
Originally Posted by Unabomber
I agree Larry. Though I'm not a real old school here, I remember the days when it took an aftermarket turbo to break into the 12s. Even thinking you could do so with a stock turbo was unpossible in many people's minds. I also agree about the turbo info. I sandblasted a Garrett rep in OT the other day about it. It netted me a couple of new compressor map links to add to my Turbo FAQ and the promise that they aren't going to sit on them anymore.
That was the "chica" right!I don't understand how they can provide better service for their customers if their customers aren't allowed to know exactly what they are getting.It would be like selling a car without gas milage and hp/tq ratings.
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Old 01-18-2005, 10:16 PM   #10
NWWagon
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If it is indeed the 13T, that is the same turbo used on the BMW 525 Turbo Diesels
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