Here are some specs for Pre 66Gt cars running to as near appendix K that I have found on some old documents from a series I tried running if this is of interest to anyone we had about 14 signed up drivers but about 6 drivers on the grid at the most.
Generally the base rules are, No Tire upgrades width or type, Race suspension is allowed on all cars to allow adjust ability. Cars Must run to homologated Gearsets (No 6 Speed Cars) Use Race transmission but adjust to correct gear set, No race diffs, No Anti roll bars, Roll cage must be added, Cars cannot exceed engine Capacity (unless we are back dating IE, 911 2.7 is backdated a 2.0L spec car, in which case do not modify the engine unless stated) and cannot be bellow minimum weights, ground clearance is 100mm. Car can run any body work which has the manufacture logo as the maker, so removing bumpers and adding extra lights. Some rules are hard to check but I put it in Good faith most drivers where here to have fun and drive cars like they where in the good old days!
Classes would be
Non Metal, Alloy GT Cars up to 2000cc: B1
Steel bodied GT cars up to 2000cc: B2
GT Cars up to 4000cc Built before 1962: C1
Gt Cars up to 4000cc Built Before 1966 but after 1962: C2
Gt cars over 4000cc: D
1962 - 1965 Lotus Elans S1 26R Class B1
-use a Elan Sprint For Base
- 160 Hp Engine
- 690 Kg
- 4 Speed Gearbox (Most elan’s used Close Ratio)
- 1600cc Engine
1962 - 1963 Jaguar E-Type Lightweight Class C2
- Use E-type S1 as Base
- 345 Hp Engine
- 1000Kg
- 5 Speed Gearbox
- 3800cc Engine
1961 - 1965 Jaguar E Type FHC Class C1
- 300Hp Engine
- 1150Kg
- 4 Speed Gearbox
- 3800cc
1965 Mustang GT350 R Class D
- Use 65 Mustang GT as Base
- 390 Hp Engine
- 1180Kg
- 4 Speed Gearbox
- 4700cc
1962 - 1965 AC Cobra 289 Class D
-Shelby Cobra 427 as Base Car with Engine Power Reduced in Lobby
- 390 Hp Engine
- 1000Kg
- 4 Speed Gearbox
- 4700cc
1964 Shelby Daytona Coupe Class D
- Leave this car completely as it is, only add race suspension and race gearbox with 4 speed.
Ferrari 250 GTO Class C2
- Leave this car completely as it is, only add race suspension and race gearbox with 4 speed and Roll cage
1960 - 1962 Aston Martin DB4 Gt Zagato Class C1
- Leave this car completely as it is, only add race suspension and race gearbox with 4 speed and Roll Cage, you may add factory bodywork
1962 - 1965 MG B Class B2
- MG B GT as base car
- 160HP Engine
- 830Kg
- 4 Speed Gearbox or 4 Speed plus Overdrive*
- 1840cc
1963 - 1965 Porsche 901/911 2.0L Class B2
-Porsche Carrera RS2.7 as base car use correct 911E bumpers and run in appropriate HP Reduction Class
- 180Hp Engine
- 950Kg
- 4 Speed Gearbox
- 1998cc (2700cc)
1958 - 1962 Aston Martin DB4GT Class C1
- Use Aston Martin DB5 as base with appropriate Power reduction
- 302HP Engine
- 1200kg
- 4 Speed Gearbox
- 3670cc
1958 - 1962 Austin Healey 3000 / 100/6 Mk1 Class C1
- 250HP
-100kgs
- 4 Speed
-3000cc
1962 - 1965 Austin Healey 3000 MK2 Class C2
- 300hp Engine
- 1000Kgs
- 4 Speed Gearbox or 4 Speed with Overdrive*
- 3000cc
Overdrive* tune 5th gear to drop engine revs by 500rpm inline with original overdrive units. Am still working out how best to do this.
will try and find more of the cars some are missing stats until I find the correct paper work, other cars are
Corvette C1
Corvette C2,
Ferrari 250 California SWB
I also have some Pree 66 Touring car appendix K builds for
Alfa Romeo GTA
Ford Mustang GT
Lotus Cortina
VW Beetle? (this is so slow it’s not worth racing)
Other possible cars but not included with reasons, plus too many cars would cause a lot of issues
AC Cobra 427 (Not homolagted in time for FIA racing)
Austin Healey Sprite (very slow)
Austin Healey 100s (3000 mk1 less powerful than mk2.)
Aston Martin Dp214 (Using db4 zagato but they don’t look similar enough)
Aston Martin Dp215 (Using db4 zagato but they don’t look similar enough)
Aston Martin Dp216 (Using db4 zagato but they don’t look similar enough)
Aston Martin DB 4 GT Lighweight (cannot find a correct weight for this car and already have 2 variants)
Corvette Grandsport (Never homologated under FIA GT, but was a sport racing car)
Ford Mustang GT350 (Heavier and not as powerful as an R)
Jaguar E-Type semi Lightweight (Is not different enough from other variants.)
MG B GT (not roadtser, roadster has extra hp to bring power to weight the same as a fia roadster, Gt where not used often only in Targa Florio)
MG A (Very Slow)
Triumph TR3 (Very Slow)
I would gladly try rerun a series if there would be people interested and I do have a Performance index handicap system which means that after working out some calculations all cars receive a relevant penalty time after the race bringing the results much closer. In our series the overall winner after 4 races was an MG B.