Arashi 18g TD06 7cm Install Thread **Update with photos and video***

[PVNRT]

Hello I am about to buy an Arashi 18g...the newest generation with billet wheel and adjustable wastegate not the leftovers from 2010. They seem to have improved the design vs the older models. They actually responded to my questions quickly and it seems like the dealers will accept $550 offers by looking at ebay sold listings.

Does anybody have experience with these?

Please don't blindly respond saying ebay turbos are junk. You would be amazed at the recent metullargy advances in Taiwan factories in the last few years. Many US tool companies are making their tools there now (major brands not just Harbor Freight). If you watch some tool teardown vids on youtube you will see Snap on etc use castings from Taiwan more and more.

Please no brand whores....looking for objective answers.

Yes I searched but no info on the latest generation turbos.

Either way I will likely buy one and start a build thread soon and give info good or bad.

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[PVNRT]

Just made a $450 offer ($719 ask price) trying to find the bottom for everyone's benefit. I will let everyone know the outcome will probably land in the $600 range.

Again this is for the newest generation with adjustable wastegate 18G single scroll wrx flange.

I don't mind being the guinea pig for this (not my daily driver)and will report back

[subaru_gc8]

Originally Posted by PVNRT

Just made a $450 offer ($719 ask price) trying to find the bottom for everyone's benefit. I will let everyone know the outcome will probably land in the $600 range.

Again this is for the newest generation with adjustable wastegate 18G single scroll wrx flange.

I don't mind being the guinea pig for this (not my daily driver)and will report back

you know that a bad turbo can rip up your block too right?

[PVNRT]

Originally Posted by subaru_gc8

you know that a bad turbo can rip up your block too right?

Possible but not likely...if the compessor wheel grenaded it would probably get caught in the intercooler, anything that made it through would be aluminum and be shot out with the exhaust. I don't think it would harm the valves unless it really got on the seat and was a large piece but a large piece cannot pass through the intercooler.

If it has a decent balance job, most failures/leaks are caused by an undersized oil drain or plugged PCV.

Anyhow....seller responded at $683 which is the same price as their official website but you get free shipping if you buy from ebay dealer (drop shipper). I am probably going to buy it and will let everyone know the honest results. Now I need some injectors....walbro is already in.


I was going to go the VF or 16G route but decided to run a larger turbo and spin it slower.

[Unabomber]

Run larger turbo and spin it slower. You know not what you do and that's not how that works. I've been spinning the Jesus out of every turbo I've had and they've never failed. You stretch your turbo to meet your goal...you don't buy something too big and casually run it. And an 18G is not "a larger turbo", its one small step up in the food chain from a 16G and 0 steps up from Blouch's 16G-XTR.

Trying out a cheap turbo is fine, but at least try one out that will get decent horsepower as I bet you $7, that Arashi unit won't see 350 WHP.

[PVNRT]

Originally Posted by Unabomber

Run larger turbo and spin it slower. You know not what you do and that's not how that works. I've been spinning the Jesus out of every turbo I've had and they've never failed. You stretch your turbo to meet your goal...you don't buy something too big and casually run it. And an 18G is not "a larger turbo", its one small step up in the food chain from a 16G and 0 steps up from Blouch's 16G-XTR.

Trying out a cheap turbo is fine, but at least try one out that will get decent horsepower as I bet you $7, that Arashi unit won't see 350 WHP.

Thanks for the reply I realize your replies hold some weight. My goal of using larger and spinning slower was to reduce charge air temp. I have a 202K mile ej20 so I am targeting high 200s-low 300s whp and want the exhaust to breathe better with a larger turbine I would rather sacrifice response for efficiency, just my personal preference. I come from the Honda world where crossover is actually possible (intake manifold pressure being higher than exhaust manifold pressure) so these crazy flat engines are new to me.

My tdo4 was dying so I am just looking for something to replace it with a little room to grow...not looking to split the block in half. I would rather shift the power band up where there is less chance of detonation....(normally ).

Like I said I am keeping this objective and will gladly admit I made a mistake if it doesn't work out.

I am worried about fitment with the TMIC but will make it work.

[Unabomber]

Fitment should not be an issue.

Reducing charge air temp as you call it is a function of the intercooler and having a big ass turbo or a small ass turbo or low PSI or high PSI bears no role on that. http://forums.nasioc.com/forums/show....php?t=2298336 will help keep your intercooler as cool as possible.

18gs on a stock car are about as high as I would go with a good degree of reliability, so your turbo choice based on all stock is actually pretty decent. As to the brand....I don't know, but here's to hoping to spools as expected and serves you a long time!

I do appreciate these new turbo names as I think the Subaru (and others) communities have been fleeced for many years over turbos....considering the housing is the same and the wheel cost difference is like 9 cents, one wonders WHY a turbo vendor will sell a 16G for $1000, 18G for $1200 and a 20G for $1500. I know the truth and wish others would too.

[Titter]

this is your best option in my opinion.

https://www.turbopartscanada.ca/prod...d-turbocharger

its a 20G wheel stuffed inside a ported VF turbo. dyno graphs in the link. 350whp/380wtq. balance sheet and warranty provided.

$1275CAD = $989USD at todays exchange rate. even cheaper if you send them a core.

[PVNRT]

Just made the purchase....I will upload unboxing pics if there is any interest, including whether or not there is a balancing sheet.<br />
<br />
I might take it apart before install to see what's really inside but that snap ring on compressor housing can be a nightmare so I dunno. I am hoping the CHRA is a MHI clone so it can be rebuilt if needed in the future we shall see.

Do you guys think 650cc injectors will be enough?<br />
<br />
I am pretty new here....should I start a new thread once it's installed or just use this one?

[slow.wagon]

Originally Posted by PVNRT

Just made the purchase....I will upload unboxing pics if there is any interest, including whether or not there is a balancing sheet.<br />
<br />
I might take it apart before install to see what's really inside but that snap ring on compressor housing can be a nightmare so I dunno. I am hoping the CHRA is a MHI clone so it can be rebuilt if needed in the future we shall see.

Do you guys think 650cc injectors will be enough?<br />
<br />
I am pretty new here....should I start a new thread once it's installed or just use this one?

I actually ordered the TD06H-20G 10cm a week ago. I was on a Cavalli Stage 2 setup at one point but it sprung a leak at its fancy billet CHRA and it never ran properly since, now its a pretty book stop.

A few local folks shared some success stories with the Arashi and it seemed like a reasonable risk to me. I guess I'll find out when it comes time to tune it.

[D-Rodman]

Originally Posted by PVNRT

Just made the purchase....I will upload unboxing pics if there is any interest, including whether or not there is a balancing sheet.



I might take it apart before install to see what's really inside but that snap ring on compressor housing can be a nightmare so I dunno. I am hoping the CHRA is a MHI clone so it can be rebuilt if needed in the future we shall see.



Do you guys think 650cc injectors will be enough?



I am pretty new here....should I start a new thread once it's installed or just use this one?

Keep the information related to your Arashi all here please

850cc injectors for an 18G on my 2.0L STi motor, was overkill.

[slow.wagon]

Originally Posted by D-Rodman

Keep the information related to your Arashi all here please

850cc injectors for an 18G on my 2.0L STi motor, was overkill.

I plan to use DW1000's since I had them from my last setup. I guess I'll really be overkill.

[Snellicus]

Never heard of them. I have a cobb 20g on my 11 wrx. My buddy got a mamba and his tuner swears by them. It has been doing quite well

[D-Rodman]

With a proper fuel pump you’ll be all ready for e85

[PVNRT]

You may be using an Arashi and not even know it, there was speculation the Cobb 20g is a rebadged Mamba. Mamba is linked to Arashi . All (top tier grey market) housings are probably made side be side, its the CHRA that differs I am hoping. Thats the part that keeps me searching....so many brands are just rebadged with an 800% mark up. The tricky part is finding the truth but when profit is involved there is a lot of smoke screen.

I know Garrett or MHI are trusted brands but I think I found a good combo of Chinese copying and Japanese tolerances. We will see soon.


And I am running this on NV 91 pump. There is no E85 within 80 miles. Walbro pump is already in...looking for 700cc injectors now. Running into the same problem now there are some on ebay (not the obvious Denso copies for $75) but rebuilt yellows rated at 700cc. Not sure what to do yet.

[D-Rodman]

I'd suggest just installing those id1000 you already have, don't get deatchwerks modified injectors.

[slow.wagon]

Originally Posted by D-Rodman

I'd suggest just installing those id1000 you already have, don't get deatchwerks modified injectors.

Explain this comment.

[D-Rodman]

Ask your tuner his opinion on deatschwerks injectors, seems most tuners prefer Injector Dynamics nowadays. It’s all about tuning with one versus the other.

[PVNRT]

D Rodman was responding to a different person, I only have oem wrx injectors right now.....but since the car is on jackstands I think it will be ok with those for now , replaced front 02 sensor today and finally got exhaust manifold off today, only broke 2 bolts!, I don't care what people say you do need to remove it to install killer b oil pickup ***128512;***128512;***128512;

[slow.wagon]

Originally Posted by PVNRT

D Rodman was responding to a different person, I only have oem wrx injectors right now.....but since the car is on jackstands I think it will be ok with those for now , replaced front 02 sensor today and finally got exhaust manifold off today, only broke 2 bolts!, I don't care what people say you do need to remove it to install killer b oil pickup ***128512;***128512;***128512;

I just realized your username is the equation for the ideal gas law. I'm slow.

[PVNRT]

Will try again tomorrow....tried to post pics and it turned into a mess

[PVNRT]

http://i.imgur.com/eZhACsB.jpg
http://i.imgur.com/MY0WqBX.jpg
http://i.imgur.com/ONWfH7c.jpg
http://i.imgur.com/qrLidXD.jpg
http://i.imgur.com/SxhQgPB.jpg

[PVNRT]

Added photos finally! Had to use firefox and chrome but anyways they should work now.

Turbo was packed well double boxed and expanding foam. Vendor answered questions quickly. I normally toss the supplied hardware and gaskets with aftermarket stuff but I have no issue at all using the suppplied studs copper washers braided oil feed and multi layer gaskets, it all looks to be quality stuff.

I just wanted to upload some detail pics as they don't exist anywhere online. The castings are pretty impressive, fit and finish looks surprisingly good. Turbine wheel has balancing marks and it came with a balance sheet (who knows if legit).

All fasteners are pre torqued and have that yellow grease crayon mark. Oil drain and coolant fittings are pre installed just need to attatch oil feed but it does come with all the fittings needed.


I am pretty happy with this purchase! But as they say the proof is in the pudding. Did plugs and bled brakes today, 750cc injectors going in tomorrow and turbo install begins Monday.

I did a quick and dirty test fit and it looks like I won't have to clock compressor housing but won't know for sure until intercooler is back on.

Please feel free to ask questions I am here to help.

Would I buy it again? Hell yes
(based on initial quality)

[PVNRT]

I have ordered tactrix cable today also....if anyone is feeling froggy can you hook me up with an 18g 750cc base map? I have been looking at romraider forums but wanted to ask ya'll too.

[PVNRT]

Guess I will turn this into a semi-build thread. Installed the injectors today I used 750cc AUS brand which are identical to ID and RC sells them too, but I bought closer to the source and paid $225 for the set.

Injectors went in easy GBODs both came off in under a half hour not really that hard b
ut I have the turbo IC battery washer tank already off from last week so maybe thats why. Took about 3 hours because I had to solder on new pigtails for them and I was just poking around looking at stuff. There was sand in the injector holes on all 4, the injector seat area was clean but the sides had dirt. Got it all cleaned out now and new injectors in. I am able to spin the injectors with some pressure they are not really loose but I will keep an eye on them. I checked AUS next to OEM injectors and they are the same height and O rings are very similar size and shape so it should be ok.

Decided to do valve cover gaskets because I have easy access now.

Thats it for now