Jet Boat Performance

Impeller selection information and charts

IMPELLER SELECTION CHART AT, TJ, SD-309, DOMINATOR,
BERKELEY, ENERGIZER KIT Jet Drives 
 (use the intersecting reference numbers as shown in the example below, impeller "cut"=hp=rpm. This chart can be used  to choose cam choices, help design  your engine build , diagnose runability or lack of power problems, or to determine approximate unknown horse power and installed impeller cuts. NOTE these are aproximates based on "in spec jets" and will vary slighlty from jet to jet and Impeller manufacturer, these numbers can be also affected by Impeller detailing and other internal jet modifications.  JBP offers all ascpects of Jet drive service and blueprinting.

H.P. 9.5 9.25 AA A B C
150 2900 3050 3200 3600 3800 4050
200 3200 3350 3500 4000 4200 4450
250 3450 3600 3700 4300 4500 4800
300 3800 3950 4050 4550 4800 5100
350 4050 4200 4300 4750 5100 5350
400 4250 4400 4500 5050 5300 5600
450 4450 4600 4700 5250 5500 5850
500 4650 4800 4950 5400 5700 6050
550 4800 4950 5100 5550 5850 N/A
*THESE RPM VALUES MAY VARY ACCORDING TO HOW YOUR BOAT ALLOWS THE PUMP TO LOAD
HORSE POWER REQUIREMENTS ARE AT THE PUMP SHAFT

 

AMERICAN TURBINE JET DRIVE IMPELLER SPECIFICATIONS
IMPELLER SIZE LARGE DIAMETER SMALL DIAMETER MACHINED ANGLE
9 1/2" 9-1/2" 8-1/4" 25 DEGREES
9 1/4" 9-1/4" 8-1/4" 20 DEGREES
AA 9-3/32" 7-13/16" 25 DEGREES
A 9" 7-1/4" 30 DEGREES
B 8-3/4" 6-3/4" 33-1/2 DEGREES
C 8-1/2" 6-1/2" 33-1/2 DEGREES

 

Extended Horse power chart (courtesy of Hi Tech Performance)