07 Allowable mods: Stock category
Description
This article is from the VW Performance FAQ, by with numerous contributions by Jan Vandenbrande others.
07 Allowable mods: Stock category
Cars must run "as specified by the manufacturer," with
the exception of specific allowances. These allowances
include [jay.mitchell]:
1.The use of any front swaybar.
2.Any suspension adjustment IF the manufacturer makes
provision for adjustment for non-competition purposes.
3.Any shock absorber that is does not change suspension
geometry or alter the range of travel (i.e., must use
original mounting position). I [jay.mitchell] use Konis
on my A2 VWs, and the Nationals-winning cars have all
used Konis as well.
4.An aftermarket steering wheel within 1" total diameter of
the stock wheel. Wheels with airbags may not be changed,
and cars made after model year 1990 must retain the stock
steering wheel. <Note: this allowance may be withdrawn
soon>.
5.Road wheels of the stock diameter and width with offset
within +/- 1/4" of stock. This means that wheels with 6mm
less offset than stock are allowed, resulting in a track
width increase of 1/2"
For example, it allows wheels with 32mm offset on 8V GTIs
and Jettas (stock is 14x6 with 38mm offset), widening the
track by a total of 1/2".
6.Any brake lining material.
7.Certain engine "blueprinting" practices, although these
are rapidly being phased out. Balancing and blueprinting
is only allowed if done by the parts-bin technique; no
machining is allowed. Cars model year '92 and newer may
not overbore/balance, and all cars starting in 1/1/95
this is not allowed.
8.The use of any DOT-legal "street" tire. The hot setups
are BFG COmp T/A R1s or Yokohama A008RSIIs, and these
tires are stickier than pure racing rain tires were five
years ago! [Jonathan Dove]:
9.Ignition timing must be within factory setting
10. Can change the exhaust system behind catalytic converter
(if equipped) or exhaust manifold.
11. Allows the use of bolt in roll cages.
Other than the above modifications, you have to leave
your car pretty much as it was manufactured in Stock,
including the original driver's seat, body trim (you
could add non-aerodynamic appearance bits, but you could
NOT remove original trim), battery location and size,
except for loose items, such as the jack and spare tire
which may be removed.
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