I agree with this. I would have no concern over the turbo at all.

 

I think it is a major concern.
Water cooling draws heat away, after engine switch off.
No water connection and the bearing retainer, oil seals will cook and oil will oxidise.
No water cooling will reduce turbo bearing longevity - particularly with physically bigger turbos (increased heat soak) and raised boost pressures = raised egts = increased heat soak.

 

I think you're missing the point. The mod does not stop coolant flowing through the turbo cooling passage and cooling the turbo. It purely equalises the cooling system better and more efficiently so the overall cooling temps may be a couple of degrees higher but the cooling will still happen.

 

Has the Fuji Racing one been released yet for purchase?.SJ.

 

You've misread the thread.

The egts on cylinders 1 & 3 have been considerably increased by the mod.
The turbo water cooling is being fed via cylinder 3.
One of the unanswered questions is:
By how much is the water temp being effected, per cylinder?

The orifice size of the fitting appears crucial.

 

Have you got a link to that information above mate?I have been considering fitting one as anything that can help with temps in a positive way on a tuned motor i want to know about,but also need to know fully about any research that has been found on the negative side of things if any also after being fitted.SJ.

 

https://www.iwsti.com/threads/cylind...ng-kit.319018/

https://forums.nasioc.com/forums/sho....php?t=2882734

https://www.garrettmotion.com/racing...or-your-turbo/

 

THANKS!.SJ.

 

Some info from the first site link you posted.

As you say though, the diameter of the pipe and flow rate will be critical in this mod as you don't want cylinder 4 to have better cooling than the other cylinders in theory due to knock sensor placement and put cylinders 1-3 into unsafe working limits.

 

I love the concept.

I'd also like to make sure, that I'm not going to come across anything, unexpected.

 

I know exactly what you mean.

 

It's M20 with a 1.25 pitch. People have expressed their disquiet at the cost of the kit from the U.S, understandably when you see what it is. Finding an M20 outlet from general suppliers is very difficult, M19 is freely available, M20 definitely isn't.

Subaru offer a water outlet, the part number is 21170AA020, it costs about £10. You'll need some water pipe about 6 inches long, of 5/8 bore with a 5/8th tee piece and a few good quality Jubilee clips. I bought the £80 American kit and it's on my 1st gen Legacy Turbo - all is well.

I will make my own kit for my 2.5 Outback which is currently in bits for HGF.

 

here's a m20x1.5 -> 8AN adaptor for < 6 gbp: https://www.ebay.co.uk/itm/Motamec-A...r/231803815685
or m20x1.5 -> 6AN: https://www.ebay.co.uk/itm/AN-6-AN6-...r/150591102918
or this m20x1.5 -> m10x1 for a banjo fitting (17 gbp, admittedly): https://www.ebay.co.uk/itm/SUMP-PLUG...M/142681678105

Having said that, I think I'd personally get the m20x1.5->m10, and retap it for an m12 and use a banjo on that end.

 

Someones reply to your post

Thing being the kit isnt 5/8 all the way through. It has a smaller diam outlet to slow flow.🙂 Otherwise it over cools.🙂


Any truth

 

Aren't these the wrong pitch?

 

fbtuning are selling a kit on ebay now, looks different to the dom one though.

 

Just a slightly different block adaptor.

 

T piece is much smaller?

 

Yes you're right; sorry, I thought you literally meant the kit as a whole looked different.

Presumably the smaller t-piece is the part that they're using to restrict flow (as per description: https://www.ebay.co.uk/itm/Subaru-Im...oAAOSwCUderu0f) because the black push-on fitting looks larger.

Edit: just clocked the price (and £10 postage)! I'm guessing the description is intentionally vague because it's easy to source the parts separately for less than £80.

 

I'm waiting for an adaptor to do mine. The price on this is just to out of reasonable.
I bought an M10 and will probably 3d print "a restrictor pill", 5mm, tu put inside the hose. Little flow is better than no flow.

 

https://www.ebay.co.uk/itm/Subaru-cy...wAAOSwqCdevbqc

 

OMG, yes ... facepalm moment.. i'll edit my post if I still can


Edit: Although, 2pot claims it's m20x1.5.

 

I'm not sure which is right - just noticed the different thread pitch you mentioned!

Looks like 2pot is correct:
"I just got a m20x1.5 to 10an fitting and a 10an push loc straight fitting."
https://legacygt.com/forums/showpost...3&postcount=10

 

Thks,
Just bought the 2 that were available. One for me, other for a friend. Got them for 65€ (55£ with shipment).

I'll post some pics when I get them.

 

2 Kits have arrived.
First impressions:

• Packing could/should be better;
• No instructions at all;
• Diameter of the kit looks a bit "Large";
• Hose looks a bit small and "kinkable".

I'll share more findings and dimensions later.


Does anyone know the diameter of the other kits? I'll probably 3d Print a reducer, much like the "boost pill" Subaru uses.

 

Update:
The flow will be set by the smallest inner diameter part.
The hose is 11mm, the connectors are ~10mm, aparently the magic number for diameter is 8mm, so....

I grabed a nut, including the thread was ~7mm, and with an 8mm, the drilling machine got to work.
The final result in a 8mm restrictor:

 

Thanks for updating the thread with your findings! Good to know 8mm ID is required.

FYI - your pictures aren't showing, although strangely I could see them in the initial notification email.

 

Where did you get the 8mm figure from? One one of the American sites someone has measured the I'd of the guy who did a lot of the research that's everyone's using to show how it works and his kit measured 10mm

https://www.iwsti.com/threads/cylind....319018/page-2

 

It was NASIOC, some claims that doms kit used a restrictor.
And, as mentioned before, better to be on the smaller side than on the bigger, I was planning on installing the kit this week... but now, I'm not really sure If I'll drill to 9mm.

 

From all that Ive read on it it was the fitting that did that as he has them custom made to that size, kit I had made up is too big so gonna get a custom tee piece made and have that as the restriction after seeing this 8m maybe I'll get it done as 9mm,ive also seen that fb uses an6 unsure what diameter that is but a lot smaller and goes into the tb coolant lines rather than the heater matrix ones