Seems everywhere else in the world gets the Titanium wheel turbo and we get a non titanium turbo

Does anyone know how much power and or spool up - if any - we are loosing from not having a titanium wheel in out turbo ?? Thanks

 

i doubt any
probably just weighs less

I base this answer on absolutely nothing
just a guess

 

I think the main plus of the titanium turbo is the heat restiant properties of titanium.

 

Actually, while there might not be any noticeable difference in spool up time, there would have to be some difference. Because of the physics involved, if the turbowheel has less mass and the same general shape the moment of inertia will be less. That means it will take less energy to make it spin, hence faster spooling. Of course, I don't know the exact physics for a turbowheel, so I can't help much there.

The equation would be generally like this though: C*M*R^2 where C is some constant related to the shape of the wheel, M is the mass, and R is the radius of the wheel as a whole.

*Disclaimer: Highschool physics. Could be wrong, take it for what it's worth *

 

I was going to go down this road, but the mere thought of college physics 128 is migraine inducing

 

Some one must know the deal on these titanium turbos - how much extra powerr they make????

 

The titanium part of the turbo is just the casing isnt it?

The actual wheel may be the same

titanium just dissipates heat better than the iron turbo we have
plus it probably weighs a hell of a lot less

the iron turbo probably costs less too

 

He said Titanium Wheel. That made me think the actual turbine was made of Titanium. I was just commenting on that as I read it.

 

i dont think any of us know what we are talking about

we need an expert

 

I believe it's the actual impeller that's titanium, not the casing.

 

titanium = incredibly expensive

i'm just as crazy about ti as the nexy guy, but good lordy it is some expensive metal.

 

They probably changed to cast iron to keep the under 30 grand

 

Definitely. Check out the price on titanium and compare it to iron.

http://www.micronmetals.com/titanium.htm

http://www.micronmetals.com/iron.htm

But the current turbo on the Evolution VIII isn't exactly plain iron. The turbine wheel is made of Inconel. About 40-50% cheaper than titanium.

http://www.micronmetals.com/inconel.htm

Inconel is easier to work with than titanium too making it much more cheaper to make Inconel turbine wheels than titanium turbine wheels. Inconel isn't exactly crap either so Mitsubishi isn't ripping you of either if thats your current impression from my writting. Inconel is actually used in Formula One racing too. Here's a good article about Inconel and it's uses.

http://www.burnsstainless.com/TechAr...l_article.html

Edit: Check out the site Evolution encyclopedia too. Gives some good info about the Evo VIII turbo too.

 

Titanium is not that expensive now that the cold war is over. Nearly the entire exahust system on my $10,000 929 Honda motorcycle is made out of Titanium from the factory.

 

The titanium wheel turbo spools up quicker than the regular turbo as it is lighter. This leads to less turbo lag.

Titanium turbo is an Option on the non-US Evos and it isnt standard. If you already have the standard turbo, it isnt worth the trouble/cost to get the titanium turbo as the cost outweighs the benefits(which isnt that much).