Big Bore
New member
So I was doing math this morning figuring the flow of 300cc injectors at 3500rpm.
Injector flow as far as I know is based on 1000 shots.
So 300x8 is 2400cc, but since its a 4 stroke motor, at 1000rpm flow is half that at 1200cc.
At 3500rpm it would be 1200cc x 3.5 = 4200cc per minute.
4200cc per minute is 1.1gpm.
1.1gpm is 66gph.
My Walbro, according to this graph, at 62psi is around 50gph.
Looks like I need to do the dual SD pump setup.
Anyone know the flow specs on a stock pump?
Injector flow as far as I know is based on 1000 shots.
So 300x8 is 2400cc, but since its a 4 stroke motor, at 1000rpm flow is half that at 1200cc.
At 3500rpm it would be 1200cc x 3.5 = 4200cc per minute.
4200cc per minute is 1.1gpm.
1.1gpm is 66gph.
My Walbro, according to this graph, at 62psi is around 50gph.
Looks like I need to do the dual SD pump setup.
Anyone know the flow specs on a stock pump?