Printable View
I've seen many tech articles referring to gear ratio for superchargers when trying to explain/calculate amount of boost produced. How is this calculated? Ratio of crank (drive) pulley size to size of blower pulley??? When I do mine 2.95 upper to 7.0 lower it comes out to 1:4.2 which seems high...when most articles refer to ratios in the 1:3.5 range or less.
Wayne
The magazines are talking about the internal gear ratio of the blower. For a V-1 s-trim it is 3.45:1. That is used when calculating max impeller speeds.Quote:
Originally posted by Hounddog
I've seen many tech articles referring to gear ratio for superchargers when trying to explain/calculate amount of boost produced. How is this calculated? Ratio of crank (drive) pulley size to size of blower pulley??? When I do mine 2.95 upper to 7.0 lower it comes out to 1:4.2 which seems high...when most articles refer to ratios in the 1:3.5 range or less.
Wayne
Here is a good link:
http://www.vortechsuperchargers.com/...rformance.html
Hope this helps.
Mike :cool:
Mike,Quote:
Originally posted by MeJay Racing
The magazines are talking about the internal gear ratio of the blower. For a V-1 s-trim it is 3.45:1. That is used when calculating max impeller speeds.
Here is a good link:
http://www.vortechsuperchargers.com/...rformance.html
Hope this helps.
Mike :cool:
thanks, that makes a whole lot more sense....Now I understand the formulas better.
Wayne