<VV> Seats - Autocross Classification

[Bruce Schug]

On Aug 5, 2009, at 10:45 AM, Bryan Blackwell wrote:

> Bruce makes a good point - Smitty already wrote me a note about this  
> as well.  I would contend, however, that a fully bolstered seat,  
> even if not an lighter than stock, is a performance improvement.
>
> In the case of Phil's seats, if they are some flavor of fairly flat  
> OEM style seat, I'd agree that they fit in the spirit of the rule.   
> If he's installed seats out of a special edition something that fit  
> like a glove, it's a performance improvement.
>


I disagree, Bryan. A bolstered seat of any type, as long as it is not  
a significant weight reduction, certainly fits in the following  
categories:

9. Insignificant performance enhancing or reliability enhancing
changes that do not noticeably change the appearance or function of
the vehicle are allowed. Examples are but not limited to: hidden
electronic ignition modules, slightly smaller steering wheels (within
2 in. of stock 16″ outside diameter), dress-up valve covers and oil
pans, electric fuel pumps, alternators, lower shroud removal, and
compression change due to cleanup machining. etc.

6.15 Accessories: Aftermarket accessories and/or modifications that
have negligible contributions to autocross performance will be allowed
in any or all classes. For example: spoilers, finned valve covers and
pans, lower shrouds removed.


Also, I remind you of the following performance improvements that are  
specifically allowed in stock classes:

1. Overbore with stock cylinder barrels is allowed. 3.4975″ (stock + . 
060″) maximum
2. Dual mufflers are allowed on any vehicle. Any replacement mufflers  
(no updating of stock type) may be used; stock manifolds are required.
3. Any wheel rims may be used as long as they meet these  
specifications. The following diameter wheels are allowed for cars:  
13″ and 14″, with no wheel exceeding 6″ in width, and no change  
in offset exceeding 1/4″. Forward Controls are allowed 14″ or 15″  
wheels only, with no wheel exceeding 6″ in width.
4. For classes SS-1 through SS-4, any DOT tire with an aspect ratio of  
70 or above, a wear rating 180 or above, and measuring 23″ diameter  
or larger, unloaded at 32 psi, is allowed. Tires must fit the wheels  
with no interference with the body work or suspension. For class SS-5,  
any DOT tire with an aspect ratio of 70 or above, a wear rating 180  
and above, and measuring 24.5″ diameter or larger unloaded at 32 psi  
is allowed.
5. Chassis changes to improve safety and handling may be made provided  
these changes do not exceed factory optional equipment specifications,  
dimensions and attachment points. Camber compensators are permitted on  
swing axle vehicles. Any replacement shock absorber of stock or  
factory optional type may be fitted provided that it attaches to the  
standard mounting points without alteration.
6. Yenko Stingers or Fitch Sprints must return to stock Corvair  
powertrain specifications to compete in Street Stock class, including  
the tire/wheel allowances above.
7. All chassis of the same type (early or late) are considered the  
same. Updating and backdating of bolt-on production suspension  
components is allowed.
8. All cars are allowed to modify the carburetor venting for cornering  
only, and baffle the oil pan and/or pushrod tubes in an inconspicuous  
manner to prevent harm to the cars.
9. Insignificant performance enhancing or reliability enhancing  
changes that do not noticeably change the appearance or function of  
the vehicle are allowed. Examples are but not limited to: hidden  
electronic ignition modules, slightly smaller steering wheels (within  
2 in. of stock 16″ outside diameter), dress-up valve covers and oil  
pans, electric fuel pumps, alternators, lower shroud removal, and  
compression change due to cleanup machining. etc.


Bryan, you can't seriously tell me you would run IS if you had  
aftermarket seats in your dead-stock concours vehicle, when my stock  
class vehicle is bored +.060, runs dual straight-through mufflers, 13"  
x 6" wheels with 23", 70 series tires wear rated at 180, Koni shocks,  
vented carbs, a 14" steering wheel, electronic ignition, electric fuel  
pump, and bumped compression.

Certainly LOTS of Corvairs that had non-stock seats have run in stock  
classes. This fellow can certainly run stock with his FC and not worry  
about it.



Bruce

Bruce W. Schug
Treasurer & Membership Chairman
CORSA South Carolina
Greenville, SC
Stock Corvair Group
Performance Corvair Group
bwschug at charter.net

CORSA member since 1980

'67 Monza. "67AC140"