Paxton internal gear ratio?

[Mika]

Hello,

I tried to ask this from paxton, but they don´t reply my email.

I´m looking for a bit more boost, and I would like to know what is the internal gear ratio of my Paxton supercharger? Paxton website only states that the maximum impeller speed is 55.000rpm, but how do I know how fast the impeller wheel revs now with 7" crank pulley and 2.75" supercharger pulley?

And what happends if I go slightly over that 55.000rpm? Does the supercharger just blow up, or does it just lose it´s efficiency so much that it´s not worth it?

I NEED MORE BOOST AND MORE HORSE POWER!!!

Thank you.
Mika

 

[mjorgensen Woodhouse]

Take it to the dyno and plot the boost curve. You will be able to tell when the efficiency drops off. I doubt you will get this info from Paxton. You may also call a "tuner" like DC Performance or Doug Levin as they may have dealt with this question in the past.

 

[Joseph Dell]

Hello,

I tried to ask this from paxton, but they don´t reply my email.

I´m looking for a bit more boost, and I would like to know what is the internal gear ratio of my Paxton supercharger? Paxton website only states that the maximum impeller speed is 55.000rpm, but how do I know how fast the impeller wheel revs now with 7" crank pulley and 2.75" supercharger pulley?

And what happends if I go slightly over that 55.000rpm? Does the supercharger just blow up, or does it just lose it´s efficiency so much that it´s not worth it?

I NEED MORE BOOST AND MORE HORSE POWER!!!

Thank you.
Mika

The internal step ratio on a paxton is 3.54:1. there is a math calculation that you can now do now that you have the 3.54:1 number. you'll see that you are just over 55k RPM. Over 60k RPM on a paxton you can kiss the bearings goodbye. you also can't get much smaller than 2.75 b/c you don't have enough belt wrap to get the belt to spin the pulley. translation: the belt slips.

The paxton only flows a hair over 1000cfm. and with a 2.75" pully, you are already pushing that max. spin it faster and all you'll get is heat.

Been down this path before... too bad there isn't a paxton supercharger out there that pushes more CFM. But there isn't.

good luck!