New Rotrex C38R Supercharger

Jinxx

Another thing to consider other than size ....efficiency ...the v-7 is 78% while the rotrex is 97 % ....also decide how far you want to build the motor ...how much boost you want to run etc.... I’m using the c38 rotrex and running 12lbs boost and make decent hp/tq with it but it is maxed out ....the c38r would put me with all the boost I would be able to run without building the bottom end. ....

However....I don’t have any experience with the v-7 supercharger so my opinion may be a little off ...I have been using the rotrex with no issues and would choose efficiency for my application between the two.

I also can’t find the rotrex cfm..they spec it as .63 kg/s not sure how to convert that over to cfm

cupcakez

So... is efficiency or air flow rate more important when it comes to a blower?
I would guess the air flow rate because you can have 100% efficiency of a tiny blower that has a tiny air flow rate vs a giant blower with less efficiency but way more air flow rate. Am i right or nah?

Jimbo370

here is the conversion from bing Convert kg/sec. to cu ft/min | kilogram (petrol) per second to cubic feet per minute

Jinxx

I may be wrong .. but I would say it depends on the application .. you want a blower that can flow enough CFM for the motor to maintain boost throughout the RPM and within the sweet spot of the blower without overspinning and generating excess heat .... anything after that in my opinion is a waste ... or overkill.... I would never use a small blower that couldn’t keep up...