Inboard Hydroplane Classes
Class Letter | Class | Common Engine | Relative
Speed* | Minimum Driver Age | Maximum Per Heat | Minimum Length and Other Information | Minimum Weight With Driver |
|---|
Y | 1.0 Liter | Yamaha, Polaris | 105 MPH | 16 | 12 | 13’6” Min. Length | 750 lbs |
|---|
| 17’6” Max. length |
| 9’6” Max. Width |
T | 1.5 Liter Stock | Toyota | 95 MPH | 14 | 12 | 13’6” Min. Length | 750 lbs |
|---|
Max. Length 16’6” |
Max. Width 8’10” |
S | 2.5 Liter Stock | Ford | 100 MPH | 16 | 12 | 13’6” Min. Length | 975 lbs |
|---|
A | 2.5 Liter Modified | BMW, Ford Chevy, Esslinger | 125 MPH | 16 | 10 | 16’ / 155.5 Engine | 1225 lbs |
|---|
16’ / 166.0 Engine | 1325 lbs |
E | 5.0 Liter | Chevy Ford | 115 MPH | 16 | 10 | 16’ Min. Length | 1450 lbs |
|---|
NM | National Modified
(6.0 Liter Modified) | Chevy | 140 MPH | 16 | 8 | 17’ / 155 Engine | 1225 lbs |
|---|
17’ / 166 Engine | 1325 lbs |
17’ / 246 Engine | 1350 lbs |
19’ / 308 Engine | 1900 lbs |
19’ / 368 Engine |
18’ / Built prior to 10/30/87 | 1600 lbs |
GNH | Grand National Hydro
(7.0 Liter Modified) | Chevy | 150 MPH | 21 | 8 | 20’ Min. Length | 2000 lbs |
|---|
20’ / Built after 11/1/97 | 2200 lbs |
GP | Grand Prix | Chevy | 160 MPH | 18 | 8 | 26’ Min. Length | 2700 lbs |
|---|
UL | Unlimited Light Special Class | Chevy | 120 MPH | 18 | 8 | 20’ / 468 Engine | 2000 lbs |
|---|
| 20' / 468 / 511 Engine | 2500 lbs |
| 20' / 468 Supercharged | 2700 lbs |
| G Special Class | North American Challenge Cup Series Special Class | Chevy, Dodge | 150 MPH | 18 | 8 | 26’ Min. Length
28’ Max. Length | 3,600 lbs/ 575 Engine
2,800 lbs/ 468 Engine |
|---|
U
| Unlimited Hydroplane | Lycoming T-55 L-7, Turbocharged V-12 Allison | 200MPH | 18 | 7 | 28’ Min. Length
32’ Max. Length | 6,800lbs/ Turbine
6,750lbs / Allison |
|---|
Inboard Runabout Classes
Class Letter | Class | Common Engine | Relative
Speed* | Minimum Driver Age | Maximum Per Heat | Minimum Length and Other Information | Minimum Weight With Driver |
|---|
SS | Super Stock | Chevy | 110 MPH | 16 | 12 | 16' Min. Length | 1800 lbs |
|---|
20’ Max. Length |
PS | Pro-Stock | Chevy | 120 MPH | 16 | 10 | 16' Min. Length | 1800 lbs |
|---|
20’ Max. Length |
K | K Racing Runabout | Chevy | 130 MPH | 18 | 8 | 20' Max. Length | 2100 lbs |
|---|
P | Cracker Box | Chevy | 80 MPH | 16 | 8 | 15'6" Max. Length | 1250 lbs w/out driver&rider |
|---|
JS | Jersey Speed Skiff | Chevy | 70 MPH | 16/14-Rider | 10 | 16’ Min. Length | 1600 lbs w/out driver&rider |
|---|
Stock Outboard Classes
Class | Common Engine | Relative
Speed* | Minimum Driver Age | Maximum Per Heat | Minimum Length and Other Information | Minimum Weight With Driver |
|---|
J-Stock Hydro | | | | | | |
|
J-Stock Runabout | | | | | | |
|
A-Stock Hydro | | | | | | |
A-Stock Runabout | | | | | | |
B-Stock Hydro | | | | | | |
B-Stock Runabout | | | | | | |
C-Stock Hydro | | | | | | |
| C-Stock Runabout | | | | | | |
D-Stock Hydro | | | | | | |
D-Stock Runabout | | | | | | |
| 20SS Hydro | | | | | | |
| 25SS Hydro | | | | | | |
| 25SS Runabout | | | | | | |
| 45SST | | | | | | |
Pro Outboard Classes
Class | Common Engine | Relative
Speed* | Minimum Driver Age | Maximum Per Heat | Minimum Length and Other Information | Minimum Weight With Driver |
|---|
125cc Hydro | | | | | | |
|
125cc Runabout | | | | | | |
|
175cc Hydro | | | | | | |
250cc Hydro | | | | | | |
250cc Runabout | | | | | | |
350cc Hydro | | | | | | |
350cc Runabout | | | | | | |
500cc Hydro | | | | | | |
500cc Runabout | | | | | | |
| 700cc Hydro | | | | | | |
1100cc Hydro | | | | | | |
1100cc Runabout | | | | | | |
C Service Hydro | | | | | | |
C Service Runabout | | | | | | |
C Race Hydro | | | | | | |
| C Race Runabout | | | | | | |
OSY-400 | | | | | | |
K-Pro Hydro | | | | | | |