There's no reason you couldn't do that, I bet they would go for that. It's $100 entry fee. Not that bad honestly to have some dyno time and try out a couple turbo setups...

 

Garrett has already tested a billet wheel against a cast wheel with the same dimensions and it had no effect on performance. Here is a link to the results...Garrett News & Events

Also, the test was done with a billet BW wheel. Here is a photo of the compressor wheels and covers used.

 

Haha Id email them Ryan

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Like I said the only thing I think I gained was spool up with the billet wheel

 

You're right, turbo manufacturers design compressor stages (wheel and cover) not compressor wheels. This is why BW tested the BatMo wheel and it's cover v. their wheel and their cover.

In many cases there are still some gains to be had by putting a bigger wheel in a different cover, but make no mistake the wheel's efficiency will suffer.

 

I'm not that hot on turbos, so I have to ask this: the dyno challenge is for Borg Warner based turbos, don't 6 Ohs use a Garret turbo? Again, I don't know turbos. If this is stock to stock with Batmowheel shoot out, that would settle this once and for all.

 

It says single turbo's only, I wonder why they're probably hoping thats what everybody does. I wonder if they have the dyno rigged

 

Singles only probably so they don't have to have 40 different wheels on hand for the competition and take all day swapping wheels around. Just eliminates a lot of factors too.

Karl, yeah stock 6.0's have garretts, so do a lot of stock trucks. Must be BW only.

 

Interesting conversation.

Maybe it’s me thinking as an engineer looking @ the compressor flowmap BorgWarner did a better job than Batmowheel but can you notice this on a dyno? Will be hard to say as some of us use a wastegate or not running a low AFR so there is plenty oxygen left and OK maybe a boost increase and lower EGT on the ones running a free floating turbocharger but will this give that large deference your looking for??? To many open end on engine specifications and engine tune I would say to come to a good conclusion bases on a dyno run.

Testing turbochargers on diesel engines we are looking @ a load of things.
HP/boost (pressure differential)/EGT/compressor discharge temp/exhaust back pressure/o2 left in exhaust gas (AFR)/ turbine speed if we have a hole to fit a speed sensor that is and fuel injected. In general BorgWarner will come up with better numbers as overall they run there turbo in amore efficient way based on the information they give.

 

All good points, and I agree fully with what you're saying, but the whole point of the argument is that the companies selling them were claiming increases by doing nothing more than just adding a batmowheel... regardless of compressor housing etc... I think that's more what it's about. However, Bullseye may be opening a can of worms here.

 

Well in general there is no wonder turbo, take that in mind and ad some 5% margin good or bad and you will cover all brands in the same range leaving pressure ratio out of the decision that is.

We even have a name for it. Turbo mafia making money playing with peoples minds and coming short on numbers and data in general so you can only find out with trail and error.
OK it’s not that easy with making conclusions as brands like HOLSET Garrett and BorgWarner can not give out a lot of data as most of it is linked to OEM so we have to excuse them for holding back.
As for most aftermarket turbo stuff I don’t go near them at all and so far they did come short on efficiency and you never know if the turbo can contains his parts if you blow it up big time. Some aftermarket turbo manufactures run containment test so better ask before you bay.


Improvement on flow and efficiency by changing compressor blade design and extended compressor wheel tip is marginal and takes a lot of R&D. A lot of effort is put in to prevent vibrations as the wheels getting smaller in general and having to move a lot more air going closer to all kinds of limits so there is a growing demand for titanium wheels for OEM applications as even billed will suffer from fatigue due to surge and vibrations.