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Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

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Old 01-23-2007, 02:29 PM   #21
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Quote:
Originally Posted by BillBoost37
The pulley is directly connected w/o gearing to the rotor. Whatever speed the pulley/nosedrive shaft spin is the same rpm that the rotors will spin. The only gears are to keep the rotors from hitting lobes. They have no rpm changing ability.
Exactly. All Eaton nosedrives spin the rotors at whatever speed the PULLEY is spinning. It'* direct-drive, Pat.
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Old 01-23-2007, 03:17 PM   #22
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Bill....do you suppose the pulley is smaller or the rpm required is simply less...but the WOT comment.
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Old 01-23-2007, 10:23 PM   #23
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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.
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Old 01-27-2007, 08:32 PM   #24
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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.
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Old 01-27-2007, 09:16 PM   #25
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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 ..............
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Old 01-29-2007, 04:07 PM   #26
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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.
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Old 01-29-2007, 05:19 PM   #27
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The GenV will produce the same boost at a lower RPM.

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