2022 Formula IFS

 

The goal of Formula IFS is to build a class in the spirit of the Formula 56 class popular the 80s. It will allow sleds that had been performance rated by ISR to compete in the same class. This class will allow certain Fan / Free Air and Liquid cooled sleds to compete together while also allowing certain leaf and IFS sleds to compete together. Only listed sleds may compete. Additions to the qualified sled list can be made at the discretion of the Race Director. Below is the list of qualified sleds by manufacturer.

 

Models that May Compete

 

Arctic Cat

1978 El Tigre 340

1978-81 El Tigre 5000 500cc

1979 Cross Country 340

1985-90 Cougar AFS 500cc

86-88 Pantera 440 L/C AFS

 

John Deere

1979-84 Trailfire 440 436cc

1976-78 Liquifier 340 339cc

1976-78 Liquifier 440 436cc

1979-83 Liquifier 440 436cc

 

Kawasaki

1978-80 Invader 340 339cc

1978-80 Invader 440 436cc

 

Mercury Marine

1975-76 Trail Twister 440 436cc

 

Moto Ski

1979-83 Futura LC 462cc

 

Polaris

1976-80 TX 340 336cc

1976-80 TX 440 432cc

1977-80 TXL 340 333cc

1980-82 TXL Indy 340 333cc

1983 Cross Country 340 333cc

1984-91 Indy 400 398cc

1983-92 Indy trail 440 / 488

 

Ski Doo

1984-89 Ski Doo Formula MX 462cc

1978-81 Blizzard 6500 / 7500 339cc

1978 TNT RV XC 340

1979 Cross Country 340 336cc

1980-82 Blizzard 5500 497cc

1982-84 Blizzard MX 497cc

1987-88 Stratos 496cc

 

Sno Jet

1975 Thunderjet 440 F/A 433cc

1975 SST 440 F/A 433cc

 

Yamaha

1974-75 GPX 433 433cc

1974-75 GPX 338 338cc

1976-81 EX 440 433cc

1980-85 SS 440 437cc

1984-92 Phazer 485cc

1981-89 SRV 535cc

 

Class Rules

1 Engine must retain original concept cooling system.

2 Engine must have original style ignition.

3 No performance kits, OEM/aftermarket ex. GYT kits. Heads, cylinders, exhaust, ignition, carburetors.

4 Chain case must be original, must maintain stock clutch covers, must have primary clutch covered.

5 Skis: Stock replacement type skis of any manufacturer. No aluminum/plastic skis/skins.

6 No ski spreaders on IFS models, leaf spring may use spreaders, no offset +3 inches from stock max .

7 Brakes may be upgraded to hydraulic brake systems.

8 Tracks: Original / stock replacement to 3⁄4” lug height. No longer than 121”. Changing track drivers is allowed. No cleated tracks unless stock track for that model / year was cleated. Cleated track models may convert to rubber. Rubber track models may not convert to cleats No special racing or “R” tracks, no cut down width tracks.

9 Clutch: Drive clutch is OEM or Comet 94 Duster / 102C / 108C clutch springs/weights may be changed. Secondary clutches must be stock for year, make, model can change helix and spring.

10 Suspension: Stock rear suspensions for year, make, and model no changes from stock. Stock front suspension, no widening or any other changes from stock on IFS models.

11 Handlebars: Steering post mount must remain in stock position. Risers and hooks are permitted.

12 Fuel tanks: Must be factory fuel tank for year, make, and model only and secured safely.

13 Engine regulations: Engine must retain stock cooling type, Engine must be an available option for the chassis entered in the race.

14 Reed / reed cages must be OEM, no aftermarket. Carburetors are original size and type for year/make/model of sled/ engine being run. Jetting can be changed and airbox can be removed, oil pumps can be removed. Original exhaust for year / make / model. Pistons are stock replacement up to .040” oversize allowed. No port grinding, only edge chamfering. Must have stock port sizing. Bead blasting for cleanup only, cannot remove casting lines/port material. No porting /polishing of any type on any internal parts.

15 Hoods and Belly pans may be changed or modified but must be well secured.

16 Seats may be altered but Must be well secured.

17 Studs allowed. Max height 3/8 above the track lug.

18 Carbides are allowed.