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Discussion Starter #1
Want to make 450hp on an K20a dc5 motor should I use a C30 or C38 blower. Running E85 gas.
 

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Just be aware that the C38 series Rotrex units tend to shear off the turbine shaft if you hit the rev limiter too often. And you will :) Honda engines were very susceptible to this due to their high reving nature and power delivery.
The C30-94 does not have this issue. And it will still spin FWD tyres.
I’d consider the new C38R unit which is supposed to be a better design.

In either case, it will be a blast.
 

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Discussion Starter #6
Thank you Lotus I am considering putting in a shift light so I shift before hitting the limiter.
 
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