Parallel or inline for most cfm

[sack98]

I'm building a blower system with 4, 5.7 inch thu-flow motors they are 122 cfm @ 2" orfice with 2 stage blower. When I build the system will they have more cfm building the system with 4 parallel motors dumping into a funnel or y piping 2 inline systems?

 

[edgepflow]

For centrifugal pumps/blowers in parallel, the flows add at a particular pump head (discharge pressure). For example, if each blower is rated 122 scfm at 20 inwc, the combined head of four in parallel would be 488 scfm @ 20 inwc.

 

[russ_watters]

...and that assumes a duct system with twice the size.

 

[sack98]

Sorry this will be to build pressure out going port is 2 inch

 

[russ_watters]

At what pressure does the blower generate 122CFM?

 

[sack98]

Ok what I am building is a livestock blow dryer they want a little over a grand to buy it I think i can build it for half that. So its basically 4 5.7 inch thru flow motor(industrial vacuum motors reversed) necked down to a 2 inch pipe. current setups are 2 inline motors funneled to a 1.5 inch pipe that are connected to a y pipe that is 2 inch out let. I could build this but if I am going to build it I was wanting to try to improve it I was thinking 4 parellel motors funneling to 1.5 inch pipe then those 4 dumping into maybe a 4 inch funnel that goes to 2 inch. don't know if it would help or just a waste of a lot of time. also one other question will length of pipe matter much or not It has to be portable so the closer together I can keep everything the better.