Tatra-VRR 2012 - Vintage Race Rules Forum

Tatra T603 (1956-1975)
VRR Supplemental Regulations
Vintage Production Category
(last revised 2/16/12)
The following cars are covered under these regulations:
(1956-1963) Tatra T603/1 (2545cc)
(1963-1967) Tatra T603/2 model ‘63 (2474cc)
(1963-1973) Tatra T603/2 model ‘67 (2474cc))
(1973-1974) Tatra T603/2 model ’74 (2474cc)
---------------------------------------------------------------------------------------------------------------Engines: Air-cooled V8 .047” (1.2mm) maximum overbore allowed
(2545cc) Tatra F
Bore x stroke…75mm/2.95” x 72mm/2.83”
(2472cc) Tatra G
Bore x stroke…75mm/2.95” x 70mm/2.76”
Head & Block material…aluminum
Carburetion…(2) Jikov 30 SSOP
Note: All models may use any of the above engines.
-----------------------------------------------------------------------------------------------------------------------Transmissions:
Tatra
4-speed, ratios free, “Mountain” gearing optional
---------------------------------------------------------------------------------------------------------------------------------------------------------Chassis: 4 door steel bodied sedan, monocoque uni-body constuction
Wheelbase……………………………………… 108.2”
Track dimension:
max. front…58.5"
max. rear…56.3" max.
Wheels (all tolerances included)…………………...…6 x 15”
Brakes…………………………………………………drum F,
drum R
Suspension............MacPherson strut, front w/coil spring, independent swing axle, CV joint, rear w/coil spring
---------------------------------------------------------------------------------------------------------------------------------------------------------Official weight, measured without fuel & driver, all tolerances included:
1470kg/3234#
---------------------------------------------------------------------------------------------------------------------------------------------------------Approved options:
Internal engine parts are free
Accusump
Dual megaphone “extractor” exhaust system
4) WEBER Two-Barrel, Down-Draft, 44 IDF Carburetors
Thyristor ignition
Front and rear disc brakes
Floor mounted shifter
Window glass may be replaced with polycarbonate materials
Removal of turn signals and parking lamps (head and tail lights must remain in place; pre-1971)
Substitution of any alternator for the standard generator; if no charging system, add 25# to official weight
Removal of passenger seat
Springs, sway bars, axles, spindles, hubs, etc. are free as long as track remains correct
Any other option not already listed that appears on the FIA recognition form prior to 1972
Homologated alternate bodywork as appropriate