the stock turbo is not water-cooled...

 

So we have a "yes" and "no", anyone else want to chime in? Is it AIR cooled? or oil cooled? (the stock one) Thanks.

 

It is water, I'd hate to see the results of a non-water cooled turbo on a production level car.

 

oil or coolant. i know at least one line has coolant running through it.

 

Why did you even say that, when you have no clue? Why do people post misinformation so much?

The stock turbo has coolant and oil lines. The oil is for lubrication and cooling to an extent. The coolant is for cooling.


Eric

 

^bingo.

 

Dunno why anyone would really give a f about coolant lines. Its not like it helps any significant amount. dsm'ers have been bypassing coolant lines for over 14 years now, as have many other camps. What more proof do you need of it being irrelevant than manufacturers putting out turbos without coolant lines at all.

For the most part, it is agreed by many people with significantly more experience than most of us, that running synthetic oil, which has a much higher cook off/coke creating temperature than dino oil made coolant lines rather redundent.

I'm hopefull that none of you with an evo actually believe the coolant lines do any form of cooling beyond a reliability issue with the CHRA and oil coke from dino oil.

 

Yes, that is a very good point. True synthetic oils should have a much higher coking temperature, so the coking aspect of the oil really shouldn't be a worry, as long as we use true synthetic oils.

But, the cooling factor shouldn't really be overlooked. Is it absolutely necessary...no. As you have stated many people have been running non-water cooled turbos for a long time. But, reducing temperatures, temperature gradients, and temperature swings will help extend the life of any metal part for various metallurgical reasons, not to mention the reduced stresses from thermal expansion and cooling.

Perhaps this is not a significant difference for the application, but to each their own. I perfer water-cooled turbos.


Eric

 

Yeah, and as opposed to the dsm, I definately have more faith in it given overall oil temp reduction from having a air based oil cooler, as opposed to using the coolant for cooling purposes (ambient air vs 220 deg watah).

 

kinda off topic. Will this 50trim be replaceable with a 35 direct swap?

 

Wow! The misinformation!

 

I apologize, but I was under the impression that the stock turbo was just oil cooled. I thought that only the ball-bearing turbo's had water cooling. I am sorry. I did not mean to spread false information.

 

Straight outa f-ing right field here, but does a 50 trim + 4G63 have the same performance potential regardless of whether it ends up in an Evo or a DSM? I've seen some pretty impressive dyno plots of 50 trims on old DSM's and have been wondering when, who and how the 1st bolt on kit for our Evos would take shape.

 

I am kind of confused by your post, but 50 trims have already been available, sold, installed, tuned, dynoed, and raced for awhile now on EVOs. Or are you talking about Buschur's specific 50 trim?

 

Up to the bottom of page 6.

I have no idea how this is going to perform compared to the 35r. It will spool faster, that's all I can say for now. With the lbs/min it flows it should make some serious power.

Should have dyno graphs and pictures of the kit 1st week of December.

The non water cooled subject. Too many people read crap on the internet and swear to it. They read the hype from the latest expert and go with that too. Fact is one of the best performance cars of all time the Buick Grand National was turbocharged, non water cooled and those turbos go over 100,000 miles all the time. Fact is many of the installs we do even on ballbearing turbos, that are suppose to have water lines, we don't hook them up. We bypass them for the little bit of weight (talking little here) but mostly the ease of working on the car/turbo in the future. The water cooling, in my opinion, is slightly over rated.