New Borg Warner S300sxe Turbos

jlbayes said:
i am curious about the turbine wheels as i had a sales pitch thrown at me with them. are they the same or different? I know the sizes are the same but curious about design.
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To share the information we have been discussing, the 68/76mm turbine currently used will carry over into the SX-E line, however the 73/80mm turbine wheel design has been changed. The machined back-cut has been replaced with a less aggressive cast clip, I had hoped this was the change they would make, this will allow the turbine wheel to be much more responsive.
 
Smokem said:
To share the information we have been discussing, the 68/76mm turbine currently used will carry over into the SX-E line, however the 73/80mm turbine wheel design has been changed. The machined back-cut has been replaced with a less aggressive cast clip, I had hoped this was the change they would make, this will allow the turbine wheel to be much more responsive.
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What was tehe reason for the back cut anyways?
Just to lighten up the wheel, flow more?

I tried a 66mm x 73/.80 and it was a laggy *****.

If they changed the wheel to the "J-Cup" style...I'd be willing to try another one on my setup.
 
The machined clip was to alleviate a blade harmonic in the wheel's original application from John Deere, the majority of the newer BW turbine wheels have a cup style inducer.
 
Smokem said:
The machined clip was to alleviate a blade harmonic in the wheel's original application from John Deere, the majority of the newer BW turbine wheels have a cup style inducer.
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Is this the same turbine wheel that is used in say an s465/83/.90.....just without the clipped wheel? (Same harmonic issue? )

What would spool easier, a T3 x 66/68/.83 or a T4 65/83/.90?
 
No they are different wheels entirely, the 68/76mm S300 wheel is the same design as the 74/83mm S400 turbine wheel, so the smaller of the two will spool faster.
 
Smokem said:
No they are different wheels entirely, the 68/76mm S300 wheel is the same design as the 74/83mm S400 turbine wheel, so the smaller of the two will spool faster.
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Sorry....I meant between a S300 73/83 and the s400 74/83. (Being that the S300 wheel is clipped and the s400 isn't.
 
Extended Power said:
Sorry....I meant between a S300 73/83 and the s400 74/83. (Being that the S300 wheel is clipped and the s400 isn't.
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The 73/80mm S300 wheel would most likely spool slower than the 74/83mm S400 turbine, do understand that the 73mm turbine wheel has an aggressive 20.5° machined clip.

95cummins5.9 said:
The 73 turbine is no longer clipped?
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The newer version in the SX-E line supposedly has a cast 10° clip.
 
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The revised version of the 73/80mm turbine wheel in the SX-E line will be much better for your intended use, and in that instance I would choose it over the larger 74/83mm S400 turbine wheel.
 
Are they changing the turbine wheel design in the s400 chassis too?

(There are a couple s465/83/.90 turbos for sale...will the new turbine wheels be the same as these 83/74 wheels, or are they changing this wheel also?)
 
Below is the revised 73/80mm turbine for the new SX-E line.

11168403_985325528154857_2813751094555854142_n.jpg
 
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