I tried to measure the crank pully but it is on the engine. It is about 4
inches across. The pulley on the Judson is a little smaller. The Judson
crank pully is smaller than the regular crank pulley. I can't get an
accurate measurement with a tape measure and I don't have a calipers that
Hope it helps,
----- Original Message -----
From Dean Hedin <dhedin at vsi.net>
Sent: Sunday, October 08, 2000 4:33 PM
Subject: Re: Judson drive pulley
> Can any one confirm this? All literature that I have seen for the Sprite
> show the crank pulley to be equal in diameter to the pulley on the unit.
> ----- Original Message -----
> From: "GulphMills.Com" <email@example.com>
> To: "Dean Hedin" <firstname.lastname@example.org>; <email@example.com>;
> Sent: Sunday, October 08, 2000 1:02 PM
> Subject: RE: Judson drive pulley
> > To all,
> > The correct ratio is 1:1.29...The crankshaft should turn once(1 turn)
> > every 1.29 turns of the supercharger rotor.
> > Thank you, Judson Company
> > -----Original Message-----
> > From: firstname.lastname@example.org [mailto:email@example.com]On
> > Behalf Of Dean Hedin
> > Sent: Monday, October 02, 2000 5:12 PM
> > To: firstname.lastname@example.org; email@example.com
> > Subject: Re: Judson drive pulley
> > > Does anyone out there have a dimensioned drawing (for the pulley on
> > > Judson housing itself) you can email me so I can have a new pulley
> > >
> > > I will use the original dimensions as a start but I have to modify the
> > > original due to my set up.
> > >
> > > Thanks
> > >
> > > JG
> > The pulley should be the same size as the as the one on the unit.
> > The face of the supercharger pulley that goes against the pulley
> > already on the engine should have a raised portion that fits inside
> > of the concavity of the engine pulley. You then have to drill 2 (or
> > pits in the face of the supercharger pulley that can interlock to the
> > in the engine pulley. I believe I modified the crankshaft bolt (that
> > onto both pulleys) by shaving down the thickness of the bolt head.
> > This made it easier to tighten the bolt due to the close clearance of
> > pulley to the front crossmember.