Re: SCCA roll bar rules/Synthetic Oil

[Chris Poore <caspo@domain.elided>]

Let me first start off by saying that my first car was a VW Fox which
became a DSP autocrosser. When sold at 210,000 miles could still pass
the new car specs for engine compression. I had used Mobile 15w50 from
5000miles on.

The SCCA general compitition rules are as follows:

6. Material:

A. Seamless, or DOM (Drawn Over Mandrel) mild steel tubing
(SAE 1010,1020,1025) or equivalent, or alloy steel tubing
(SAE, 4130) shall be used for all roll cage structures. Proof
of use of alloy steel is the responsibility of the entrant.

B. Minimum tubing sizes (all Formula, Sports Racing, GT, and
Production Category automobiles, and all automobiles
registered prior to June 1, 1994) main and front hoop (All
dimensions in inches):
 Vehicle Weight Material
 Without Driver Mild Steel Alloy Steel
 Up to 1500 lbs. 1.375 x .095 1.375 x .080
 1500-2500 lbs. 1.50x .095 1.375 x .095
 Over 2500 lbs. 1.50x .120 1.50 x .095
  or 1.75 x .095

C. Minimum tubing sizes for (all Showroom Stock, Touring
and Improved Touring Category automobiles registered
after June 1,1994) main and front hoop, downtubes, rear
supports, diagonal:

Up to 1500 lbs 1.375 x .095 DOM I Seamless I Alloy
1501-2200 lbs 1.500 x .095 DOM I Seamless I Alloy
or 1.500 x .120 ERW
2201-3000 lbs 1500 x .120 DOM I Seamless/Alloy
or 1.750 x .120 ERW
  1.750 x .095 DOM I Seamless I Alloy
(American Sedans may constmct to these
specifications regardless of weight.)
3001-4000 lbs 1.750 x .120 DOM I Seamless I Alloy - No
ERW

Also:

GCR141
6. Bracing:

The main roll hoop shall have two braces extending to the rear
attaching to the frame or chassis. Braces shall be attached as
near as possible to the top of the main hoop not more than six
(6) inches below the top and at an included angle of at least
thirty (30) degrees. On cars where the rear windowibulkhead
prohibits the installation of rear braces (e.g., Honda del So~), the
main hoop shall be attached to the body by plates welded to the
cage and bolted to the stock shoulder harness mounting points.
This installation design must also incorporate a diagonal bar
connecting the top of the main hoop to the lower front passenger
side mounting point ("Petty Ba:").

7. Side Protection:

A side tube connecting the front and rear hoops across the
driver's door opening is mandatory and across the passenger's
door opening is allowed (recommended). The telescope section
should be at least four (4) inches in length. Minimum bolt
diameter 3/8 inches. The driver's window safety net may be
mounted to this side tube and the top cage tube. Driver's door
side tubes may extend into the door. NASCAR-style side
protection is penniffed. The driver's door window glass, window
operating mechanism, inner door trim panel, armrest, map
pockets, and inside door IatcMock operating mechanism may
be removed and the inner door structural panel may be modified,
but not removed to facilitate this type of side protection. The
stock side impact beam and the outside door latch/lock
operating mechanism shall not be removed or modified.

8. Mounting Plates:

A. Each mounting plate shall be at least .080 thick if welded
and 3/16" thick (with appropriate backing plates) if bolted.
There shall be a minimum of three (3) bolts per mounting
plate if bolted.

B. Each mounting plate shall not be greater than 100 square
inches and shall be no greater than twelve (12) inches or
less than two (2) inches on a side.

C. Whenever possible, mounting plates shall extend onto a
vertical section of the structure (such as a rocker box).

Also the GCR states that Hardware should be Grade 5 or better and 5/16"
minimum diameter

Hope that helps. Also this is my first entry to the digest, sorry if I
get the format al wrong.

Chris in SC

79 Alfetta
87 Milano Gold
95 VW Golf
96 Audi A4

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