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Titanium Turbo turbines


TRD3000GT
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not wrong IMO.

 

but its all commercially driven ie whats best isn't always commercially viable (cheap enough!) then it doesn't happen

 

Titanium, is basically tougher, and has a better strength to weight ratio than steel, but is going to cost a lot more to produce.

 

Probably be on a lot more cars by now if F1 had stayed Turbo.......

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Guest Terry S

I may be wrong here guys but I thought titanium was not suitable for the exhaust side onf the turbo beacause of the extreme heat. Are these titanium compressor wheels? Garrett sell aluminium comp wheels now.

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here is some info on these.

 

If we can hook some of these up Im sure there would be a lot of happy people!

 

The metal is VERY VERY light compared to the steel turbos which I think means MORE poer LESS lag.

 

http://www.turbos.bwauto.com/en/products/images/img_titan_1.jpg http://www.turbos.bwauto.com/en/products/images/img_titan_2.jpg

 

 

Titanium compressor impellers

 

Modern commercial vehicle turbochargers are subject to very high loads due to the wide range of applications they are used in. In many cases where there are extreme loads, a compressor impeller made of an aluminum alloy determines the service life of the turbocharger. In particular, material fatigue can result from extreme loads, especially when the loads are cyclical loads occurring at low frequencies. This phenomena is also known as low cycle fatigue (LCF).

Various measures can be taken to increase the service life. For example, the circumferential speed of the compressor impeller can be reduced by changing the aerodynamic design of the impeller or by controlling or reducing the charging pressure. High-strength aluminum, for example, that manufactured using the HIP technique, is often used to reduce variations in the strength of the material. The high-end solution using aluminum consists of milled compressor wheels which were also developed by BorgWarner Turbo Systems.

The increasing number of engine applications with high cyclical loads as well as the necessity to have higher charging pressures to remain within the stricter emission regulations have made an additional innovation step beyond the moulded aluminum compressor wheels necessary. In order to provide a customer with a technology that can withstand these loads and also ensure a service life that is just as long as it would be under standard conditions, BorgWarner Turbo Systems initiated a special development program.

The demands on the compressor impeller stated above make it necessary to use higher quality materials since the potential for improvement inherent in aluminum is just not sufficient anymore. The engineers at BorgWarner Turbo Systems decided to use a titanium alloy that is not only very hard, but also provides an excellent strength-to-thickness ratio.

With the titanium compressor impeller, BorgWarner Turbo Systems is now able to offer different compressor impeller technologies for special application requirements and special cyclical loads. In this manner the customer can select between cast or moulded aluminum compressor impellers or between cast or moulded titanium compressor wheels depending on the area of application.

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Guest Terry S

Quote from another site;

 

"Titanium is not recommended for high temperature applications

( > 1600º sustained ) like high pressure turbocharger or rotary engine exhausts"

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Guest Terry S

Chris, could probably get anything made up, inc. Iconel exhaust wheels, but I doubt you guys would actually want to pay for it.

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I would still run the aluminum compressor wheels. Aluminum is lighter than Titanium.

 

Why would you go to a heavier metal when aluminum does the job just fine?

 

It looks like those compressor wheels are the same thickness as regular aluminum wheels. A Ti wheel that is the same thickness as a Al wheel will be heavier.

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