What Subaru turbos are being used for the TD04-13T convertion?

[Davezj]

I have been doing a bit of reading on this subject.

the WRX and STI models seem to use the TD04-13T but there are different number stampt on the turbo compressor housing.
TD04, TD04L, TD04HL

but there is also the 49377-04100, 49377-04300, 49377-04200

is it case of as long as it is a pair of TD04L-13T , or TD04-13T or TD04HL-13T then it does not matter what the 04100 number is.
i would imagine the 49377-04100, 49377-04300, 49377-04200 numbers will be water and oil pipe orientation of posibly compressor housing orientation.

what do you guy think?

and anyone who has a TD04 subaru conversion can they tell me what type of turbos are fitted.

cheers guys

[wintertidenz]

There is also the 49377-04000, which are the TD04-13G's used on early Imprezas. There isn't much information, but IIRC these are actually TD04L's - I will confirm this later.
The only thing wrong with these ones are that they have the 90 degree elbow on the compressor inlet, which requires removal of the bend and a new piece welded in.

They are significantly cheaper however than the 13T's, as everyone wants a 13T for an upgrade.

Those MHI numbers actually signify differences between the turbos - for example the 49377-04100 are TD04L-13T, while the 49377-04200 are the TD04HL-13T.

This is what the differences in the TD04s are:
Wheel Exducer (in.) Inducer (in.) Trim
TD04 1.57 1.86 71
TD04L 1.62 1.86 76
TD04H 1.74 2.04 73
TD04HL 1.80 2.05 77


All Subaru turbos will have water ingress and egress on the same side (which IIRC is where the 49377 bit comes in), where as turbos from a Mitsubishi will have them on opposite sides. You can remove the plugs if you can be bothered to go to the effort.

[Adam.Findlay]

from what I have seen is

TD04 comes mainly on the GSR lancers 4G93T 1.8L

TD04L is on the mid-late 90's WRX's 2.0L (non STI

TD04HL came on the later model post 2000's WRX's (non STI) 2.0L

The HL has the larger exhaust housing a turbine wheel. and as Dan has said the numbers after the "L","H","HL" determine what the compressor size is. but TD04L with the 13T wheel is what you want. still nice an responsive and a huge leap from the TD03's in flow.

A "HL" TD04 will be laggier than a "L" but will not fall over when hunting higher power like a "L" would.
you can also buy the 19T wheel conversions for bloody cheap, if you get a set of "HL cores and turbines you can put the 19T compressor covers and wheels on. A pair fo 19T's are good for something stupid like 600ish flywheel hp

http://www.ebay.com/itm/Turbo-Compre...29f013&vxp=mtr

and kinugawa are a reputable japanese turbo manufacturer

[Davezj]

thanks guys that is brilliant info, i could not have asked for more.

[wintertidenz]

Even the TD04-13G will be good for mild power gains - they run out of puff around 21psi, but that's about all you would want on stock internals anyway.
You can get a 13T wheel and a super back rebuild kit to make a 13G a 13T, but it all depends on your budget.

The 13G's flow about 360cfm per turbo, so it's a fair upgrade.

[Nick Mann]

IIRC the CFM on the VR4 is about 270? So mid to high 300's should be about right IMO.

The ones i have had sat in the garage for years are TD04L which I believe to be 13T.

[WillVR4]

Info on this page from about halfway down may be of interest...

http://www.stealth316.com/2-3s-compflowmaps.htm#fm

[Davezj]

which of the TD04 turbos have the super back compressor wheel and which have the flat back.

is it the TD04 and TD04L that have the flat back and the TD04HL that has the super back.

i am also a little confussed about the, -04100, -04200, -04300, -04302, -04400, do they actually mean anything.
i could not work it out from the info given above.

i have seen lots of turbos on ebay and thye are all printed with TD04L but they have the -04100, -04200, -04300, -04302 number on them.
do the TD04H and TD04HL actually have this printedon them or do they all have TD04L printed on them and it is the -04300 that tells you it is actually an HL?

[swinks]

i am also a little confussed about the, -04100, -04200, -04300, -04302, -04400, do they actually mean anything.
i could not work it out from the info given above.

It's the code of compressor housing shape.
Tomorrow I'm at psb workshop so will check which is good for vr4 with me spare td04 set.

[Davezj]

It's the code of compressor housing shape.
Tomorrow I'm at psb workshop so will check which is good for vr4 with me spare td04 set.

Cheers tomasz, that would be really helpful mate.

[Davezj]

Info on this page from about halfway down may be of interest...

http://www.stealth316.com/2-3s-compflowmaps.htm#fm

cheers Will that is a lot of info on that linked page, a massive amount about turbos and flow maps how to read them and what turbo numbers mean.
i have only just skimmed through it, that will take a lot of reading.

[wintertidenz]

Usually it is the T's that have the superback, and the others have a flatback.

Flatback models are: 9B, 12T, 13C, 14T, 13G and 15G. Superbacks are 13T, 15T, 16T, 18T, 19T and 20T.

From what I have found in my research you can put a superback wheel on with the appropriate rebuild kit, and replace the compressor housing or remachine it. You would probably need the appropriate shaft as well.
Here's an example of a 13T to 19T upgrade, note that you get about 100CFM extra for your money (so approx 25% more): http://shop.midwestturboconnection.c...04-Upgrade.htm
These guys also offer the upgrade, for ANY TD04: http://site.scrollproducts.com/en/hy...d04-mitsubishi

The numbers on the end correspond to the compressor housing and wheels - not just the compressor housing shape. A 49377-04100 is a TD04L-13T, whereas a 49377-04000 is a TD04-13G (haven't confirmed on mine if it's a L yet) but it has a 90 degree inlet as well as a different compressor wheel. The 13T has a straight inlet.
The -04200 looks identical to a -04100, for example.

The best thing to do is actually Google the numbers when you come across them. Some of the turbos will have stamped on them TD04L, TD04HL or TD04 - but you need to either measure the size of the wheels or check online for the information.

If you are going to buy two turbos, match their 49377- etc numbers. Otherwise you will end up with issues.

[Davezj]

Usually it is the T's that have the superback, and the others have a flatback.

Flatback models are: 9B, 12T, 13C, 14T, 13G and 15G. Superbacks are 13T, 15T, 16T, 18T, 19T and 20T.

From what I have found in my research you can put a superback wheel on with the appropriate rebuild kit, and replace the compressor housing or remachine it. You would probably need the appropriate shaft as well.
Here's an example of a 13T to 19T upgrade, note that you get about 100CFM extra for your money (so approx 25% more): http://shop.midwestturboconnection.c...04-Upgrade.htm
These guys also offer the upgrade, for ANY TD04: http://site.scrollproducts.com/en/hy...d04-mitsubishi

The numbers on the end correspond to the compressor housing and wheels - not just the compressor housing shape. A 49377-04100 is a TD04L-13T, whereas a 49377-04000 is a TD04-13G (haven't confirmed on mine if it's a L yet) but it has a 90 degree inlet as well as a different compressor wheel. The 13T has a straight inlet.
The -04200 looks identical to a -04100, for example.

The best thing to do is actually Google the numbers when you come across them. Some of the turbos will have stamped on them TD04L, TD04HL or TD04 - but you need to either measure the size of the wheels or check online for the information.

If you are going to buy two turbos, match their 49377- etc numbers. Otherwise you will end up with issues.

thanks for the info yet again, much appreciated.
the super back info is great as i do need it for buying the correct rebuild kit.

[Davezj]

Turbo master catalogue has a bit of info on this,
the TD04L-13T is near the bottom of the list.
http://www.turbomaster.info/eng/cata...hi&pagina=TDO4
i think the crucks of this is that the catalogue says the 04100 was replaced by the 04200 and this was replaced by the 04300 so i presume the 04300 is the one to go for as it is the latest design that is widely available.

here is the 49377-04300 breakdown of parts and part numbers if you double click the drawing at the top of the page it will enlarge it to view.
http://www.turbomaster.info/eng/mits...9377-04300.php

[Davezj]

here is an ebay rebuild kit for the TD04-13G not the TD04-13T but if you scroll down the page it shows you the difference between the flat back and super back kits.

http://www.ebay.co.uk/itm/TD04-TURBO...item338a6d3e71

[swinks]

Cheers tomasz, that would be really helpful mate.

Dave, I have pair of:
TD04L 49377-04100 and TD04L 49377-04300
Both turbochargers have identical internals, the difference is direction where vacuum outlet port is facing.
Picked them both (one for rear and other for front) due to both required clocking (rotating) of compressor housing, and this configuration was most suitable.

Hope it helps.

[Davezj]

Shame you did not post this up sooner, i have bought some turbos and flanges for a potential project .
i would have bought then if i had not already invested in the parts i have bought.

[swinks]

Well, just yesterday I've realized that I have them and don't need anymore. Partially thanks to you.
I just forgot about them, till you were starting asking questions, and yesterday dug them out at psb workshop

[Davezj]

right i have another question,
subaru, mitsubishi, and nissan all use TD04 of various specs, but is the exhaust output flange the same size and bolt pattern on all of them? i am not talking about the flange that mounts to the exhaust manifold, but the flange that connects to the exhaust down pipe.
I have been having a look at the exhaust flanges and they look similar but i a not sure.
you can see the the flanges and gaskets on ebay which is a nice comparison, but i can't really tell. i need all your opinions on this.
here are some examples of ebay auctions items,
subaru
http://www.ebay.co.uk/itm/TOG-SUBARU...item1c31929f95
http://www.ebay.co.uk/itm/SUBARU-WRX...item563e2e9911
http://www.ebay.co.uk/itm/3700479227...84.m1436.l2649
Mitsubishi
http://www.ebay.co.uk/itm/Mitsubishi...item20c61d8489
http://www.ebay.co.uk/itm/TD04-10T-T...item2a2cce796f
nissan
http://www.ebay.co.uk/itm/3303684107...84.m1436.l2649

[Davezj]

double post.