Water Cooled T28

[Specvengeance]

I bought a T28 that has the passage way for water and oil cooling, My question is if I am not running anything higher then the IWG 8psi do I really need to run the water cooling.

And How do i tell if the turbo has a water jacket?

[turbonola]

you should, just get your water from the throttlebody ports. i'm running a gti-r t28 and ran waterlines from the throttlebody.

[92KA-T]

its a very good idea to run water to your turbo.. im just runnin a t 25. and its water cooled and got it from the tb. very easy to do and might save your turbo..

[kouki_hmongster]

the water hole is there for a reason, so that you can run water cool and oil through it. they wouldnt make it if there wasnt a reason for it. also it would help out on the life of the turbo, so just do it since it isnt hard to hook up. and if i'm right then you have to run water cool on ball bearing turbos that come w/ watercooling holes.

[Seishuku]

Water cooling is to help reduce oil coking, and is useless if you already do an idle cool down or have a turbo timer.

I don't run any water in my T25, and it's got 80k miles on it, it's no worse for wear. Running at 11PSI too.

[WDRacing]

ANY cooling is good. Saying it's useless is ignorant. Reducing thermal temps is a good thing...always.

[480sx]

Buddy of mine rebuilds turbos for a living(7 years) and says the same thing as Seishuku.

It helps if you abuse your turbo with hot shut offs, thats the main reason its used on passenger cars. However hot shut offs will kill a turbo regardless of if its water cooled or not.

I cant really argue your point WD, because it makes sense. Just going on what iv heard.

[neverlift]

alright, made my day wiht this, wd was wrong this one time I have seen seriously it is more ignorant to beat your turbo then shut the thing off HOT , if you drive normal for the last minute or so of your drive the turbo should be fairly cool depending how hard you were beating on it...

< ran the hell out of his t25 @11psi with a ****ty leaking IC, for some time... no water.. couldnt tell if the coked oil was already there or not as it blew the feed line and coked any oil in it anyway

[WDRacing]

Not wrong fella's...

Like everyone has said, the MAIN reason that water cooling is used is for cooling the turbo pre shutdown. BUT, consider that as we drive we're constantly in and out of boost. In boost the mani and turbo is superheated upwards of 1200* sometimes. It depends on your driving style...but if you're like me, you didn't install a turbo so you could use it at the track

By having water flowing through the turbo it helps cool the center cartridge during off boost driving. The faster it cools the cooler it will be the next time you romp on it.

It's basic thermal dynamics here. No you don't NEED water cooling, unless it's a ball bearing turbo then it's mandatory, but having it is NOT a bad thing and will benefit quite a bit more then just shutdown oil coking.

WD

[Seishuku]

Ok, not entirely useless, but isn't critical. Unless it's a BB turbo, like you said.

But in off boost driving, the normal exhaust gas will cool the turbo as well, and since the oil is a constant flow, that cools it as well. Having 185 degree coolant flowing doesn't have a huge impact on it, IMO.

I was going to hook up my water lines on my turbo too, I even have the tee for the water tap off the TB line and since I have an SR, the water neck has a boss for the return, but I lost some of my banjo fittings and never got around to it. Plus I'm lazy.