rotary wrc?
Administrator
Joined: Jul 2002
Posts: 21,958
Likes: 115
From: portland oregon
Adjusted displacement
Most displacement limits are based on naturally aspirated, two-valves-per-cylinder piston engines. Anything more sophisticated has its displacement multiplied by whatever multipliers apply to it. These are the current SCCA multipliers:
Rotary engine: 1.8
Forced induction: 1.7
Pushrods: 0.8
Diesel: 0.8
3 valves per cylinder: 1.1
4 valves per cylinder: 1.2
variable valve timing: 1.1
Most displacement limits are based on naturally aspirated, two-valves-per-cylinder piston engines. Anything more sophisticated has its displacement multiplied by whatever multipliers apply to it. These are the current SCCA multipliers:
Rotary engine: 1.8
Forced induction: 1.7
Pushrods: 0.8
Diesel: 0.8
3 valves per cylinder: 1.1
4 valves per cylinder: 1.2
variable valve timing: 1.1
Administrator
Joined: Jul 2002
Posts: 21,958
Likes: 115
From: portland oregon
Open
This is a very liberal class, requiring only that you start with a production car and that it still be recognizable as such when you are done. Any engine is allowed, up to an adjusted displacement of 5.1 liters, as long as the block is at least derived from a block that was once used by the manufacturer of the car. That means a Mitsubishi 4G63 is allowed in any Hyundai because the Elantra once used a naturally aspirated version of that engine (the current Hyundai factory cars actually use the Tiburon's beta engine, however), or a Pontiac Sunfire could use a Toyota 2ZZ-GE because the Pontiac Vibe does. Creativity in this class is encouraged.
Turbocharged Open Class cars have to run a 40mm inlet restrictor, but this is large enough for some serious power. WRC cars use a tiny 34-mm restrictor by comparison. With the appearance of well-funded factory teams, some new rules restricting active limited-slip differentials have also appeared, as has a spec fuel.
Group 5
This is the Open Class of two-wheel drive. The rules are essentially the same as Open Class, but there is no inlet restrictor. The fact that there are only two-drive wheels with which to put power down is restriction enough. Adjusted displacement must be between 2.4 and 5.1 liters.
Group 2
Rules are the same as group 5, but the adjusted displacement is 2.4 liters. This is an attractive low-cost class, but it is destined to be a ClubRally-only class. ProRally rules will be combining these two classes in the near future. The California Rally Series has run a combined Group 2/5 Class for years, and to date the championship has always been won by a group 2 car. More power doesn't always make two-wheel-drive cars faster.
This is a very liberal class, requiring only that you start with a production car and that it still be recognizable as such when you are done. Any engine is allowed, up to an adjusted displacement of 5.1 liters, as long as the block is at least derived from a block that was once used by the manufacturer of the car. That means a Mitsubishi 4G63 is allowed in any Hyundai because the Elantra once used a naturally aspirated version of that engine (the current Hyundai factory cars actually use the Tiburon's beta engine, however), or a Pontiac Sunfire could use a Toyota 2ZZ-GE because the Pontiac Vibe does. Creativity in this class is encouraged.
Turbocharged Open Class cars have to run a 40mm inlet restrictor, but this is large enough for some serious power. WRC cars use a tiny 34-mm restrictor by comparison. With the appearance of well-funded factory teams, some new rules restricting active limited-slip differentials have also appeared, as has a spec fuel.
Group 5
This is the Open Class of two-wheel drive. The rules are essentially the same as Open Class, but there is no inlet restrictor. The fact that there are only two-drive wheels with which to put power down is restriction enough. Adjusted displacement must be between 2.4 and 5.1 liters.
Group 2
Rules are the same as group 5, but the adjusted displacement is 2.4 liters. This is an attractive low-cost class, but it is destined to be a ClubRally-only class. ProRally rules will be combining these two classes in the near future. The California Rally Series has run a combined Group 2/5 Class for years, and to date the championship has always been won by a group 2 car. More power doesn't always make two-wheel-drive cars faster.
sorry
Thread Starter
l'pool till i die!
Joined: Nov 2005
Posts: 49
Likes: 0
From: Widnes, UK
nah dont worry, i was just curious as it is one of only a handful of major motorsports that mazda has never, or recently never, entered; though i suppose if ford own part of mazda they wouldn't want any competition.
Administrator
Joined: Jul 2002
Posts: 21,958
Likes: 115
From: portland oregon
pics of rx-7s in rally races
the last is from http://www.rally.no/dag/ can you read norwegian
the first is from http://www.prorallypix.com/RX-7/rx11.html
the last is from http://www.rally.no/dag/ can you read norwegian
the first is from http://www.prorallypix.com/RX-7/rx11.html
Registered
iTrader: (4)
Joined: Aug 2004
Posts: 12,255
Likes: 8
From: Buddhist Monastery, High Himalaya Mtns. of Tibet
The 323 was a turbo 4cyl. with 4 wheel drive. It didn't have a rotory engine. There used to be a RX7 first gen that ran SCCA Pro Rally (10+ yrs ago?).
Thread
Thread Starter
Forum
Replies
Last Post
jasonrxeight
RX-8's For Sale/Wanted
2
Sep 30, 2015 01:53 PM
