is tehre any advantage to running a wieand177 instead of a holley174?

my engine currently has a holley174 on but i have a spare weiand177 i was going to put on another engine i am biulding. If i can make more HP with the 177 i was thinking about switcing them and running the 177 on the engine that's in my current boat.

Or are we talking a negligable difference that isn't worth going through the hassle of changing them over?

I don't think it would make much difference...also... Holley now owns Weiand..

the "holley"174 is a 2 rotor design

the "weiand"177 is a 3 rotor design

i am aware that both former companies are now one. no MPH advantage to running one blower over the other?

Are you running the 174 on a small block or big block?

big block chevy, 461 (30 over), 8.2:1 pistons, all forged internals, GM rect heads (mild porting),

cam: .555/.555 duration @.050: 230/236 sep 114

*in at 112 centerline

thats the info i have from the biuld sheet.

There's an interesting article on supercharging:
http://www.gearheadracing.com/Refere...dtheBasics.htm

Not sure if 2 vs 3 lobe makes a difference in leakage/efficiency though.
Gary