Exactly. All Eaton nosedrives spin the rotors at whatever speed the PULLEY is spinning. It'* direct-drive, Pat.

Bill....do you suppose the pulley is smaller or the rpm required is simply less...but the WOT comment.

The pulley'* are the exact same diameter so for any given engine rpm, both designs will spin the same speed.
I think what is meant is that the Gen V will produce the same flow/pressure as the Gen 3 but at 700 rpm lower speed.

That'* why I changed from the 3.2" to the 3.4" pulley.
I will prolly only be able to pulley down to the 3.2 for racing.....unless I arm the water/methanol injection system, then it should be possible to run the 3.1 pulley. The 3.0 & 2.9 will have to wait till further mods.......if I do any.

Someone asked about Gen V M90 power gains. On Intense site under "Project 8-Ball" they added a Gen V after many other changes before it and got over 50 extra wheel horsepower. They dropped 0.2 inches in pulley size from the Gen III blower and added the Gen V and got that big of a change. I am sure there are other comparisions between the two blowers but that was the first before and after dynos tests I have seen.

That'* why I'm expecting a 50 hp gain.

I have to start a new post because .....Holy Mother of God ....the weather was purfect today so I went for my first run after the swap ..............

My 2004 Grand Prix L32 motor uses a 7 inch crank pulley and a 3.8 inch supercharger pulley...same as my 1997 L67. Unless there is a reduction gear in the nose piece of the Gen V, the L67 and L32 spin at the same speed. So I don't know why that article you reprinted said the Gen V turns slower.

The GenV will produce the same boost at a lower RPM.

There is no gear reduction in the nosedrive. It'* 1:1.