Spoilers, SCCA legal Options

[Randal]

Down at AAS yesterday.

All the modified cars had huge spoilers. I thought 8" was the limit, but it looked more like a foot.

Got to figure out what is legal and get one of those puppies on 222.

[J P Stein]

Down at AAS yesterday.

All the modified cars had huge spoilers. I thought 8" was the limit, but it looked more like a foot.

Got to figure out what is legal and get one of those puppies on 222.

10 iches high is max. RTFB for more details.....there ARE details. (IMG:style_emoticons/default/biggrin.gif)

[jjackson]

Down at AAS yesterday.

All the modified cars had huge spoilers. I thought 8" was the limit, but it looked more like a foot.

Got to figure out what is legal and get one of those puppies on 222.

10 iches high is max. RTFB for more details.....there ARE details. (IMG:style_emoticons/default/biggrin.gif)

Randal-How did you do -underspoilered and all........ JJackson

[jjackson]

Down at AAS yesterday.

All the modified cars had huge spoilers. I thought 8" was the limit, but it looked more like a foot.

Got to figure out what is legal and get one of those puppies on 222.

10 iches high is max. RTFB for more details.....there ARE details. (IMG:style_emoticons/default/biggrin.gif)

Randal-How did you do -underspoilered and all........ JJackson

Wow-you get 10" from highest point of rear deck and sides-pay close attention to the sides!JJackson

[Randal]

Down at AAS yesterday.

All the modified cars had huge spoilers. I thought 8" was the limit, but it looked more like a foot.

Got to figure out what is legal and get one of those puppies on 222.

10 iches high is max. RTFB for more details.....there ARE details. (IMG:style_emoticons/default/biggrin.gif)

Randal-How did you do -underspoilered and all........ JJackson

Wow-you get 10" from highest point of rear deck and sides-pay close attention to the sides!JJackson

Right and I have to check whether or not there is a restriction on the number square feet or angle of the spoiler. Man you could put a lot of surface area back there as long as you don't exceed the 10" rule, right?

Here is the rule:

2. It is a non-production rear spoiler which is mounted to the rear portion
of the rear hatch, deck, or trunk lid. The spoiler may extend no
more than 10 inches from the original bodywork in any direction.
Alternatively in a hatchback, the spoiler may be mounted to the
rear hatch lid at or near the top of the hatch in such a confi guration
the spoiler may extend not more than 7.5 inches form the original
bodywork in any direction. The spoiler may be no wider that the
bodywork. The use of endplates is prohibited. Spoiler endplates
are defi ned as any vertical (or semi-vertical) surfaces attached in
front of the spoiler which have the result of capturing and redistributing
air (downforce) along all or any portion of the spoiler. The
angle of attack is free. The spoiler may not function as a wing.

[jjackson]

Randal-How did you do -underspoilered and all........ JJackson
[/quote]
Wow-you get 10" from highest point of rear deck and sides-pay close attention to the sides!JJackson
[/quote]


Right and I have to check whether or not there is a restriction on the number square feet or angle of the spoiler. Man you could put a lot of surface area back there as long as you don't exceed the 10" rule, right?

Here is the rule:

2. It is a non-production rear spoiler which is mounted to the rear portion
of the rear hatch, deck, or trunk lid. The spoiler may extend no
more than 10 inches from the original bodywork in any direction.
Alternatively in a hatchback, the spoiler may be mounted to the
rear hatch lid at or near the top of the hatch in such a confi guration
the spoiler may extend not more than 7.5 inches form the original
bodywork in any direction. The spoiler may be no wider that the
bodywork. The use of endplates is prohibited. Spoiler endplates
are defi ned as any vertical (or semi-vertical) surfaces attached in
front of the spoiler which have the result of capturing and redistributing
air (downforce) along all or any portion of the spoiler. The
angle of attack is free. The spoiler may not function as a wing.
[/quote]
Randal-EMOD current rulebook (Did not check fastrack)Read again-Endplates allowed-100SQ Inch each on 10" spoiler.JJackson

[PeeGreen 914]

Love to see pictures of yours Jay (IMG:style_emoticons/default/beerchug.gif)

[J P Stein]

Details, details....this ain't Prepared class.
From section 18.1

Rear spoilers
a. If a rear spoiler is used, it shall be mounted to the rear hatch,
deck, or trunk lid, and mount no further forward than the base
of the rear window. *The spoiler extension for the entire spoiler
is set by one measurement at the lateral midpoint of the car.
At that point, the spoiler may not extend more than 10” from
the attachment point out to the outer or free edge. This sets
the maximum height above ground at all other locations on the
spoiler. The result may be a flat topped rather than contoured
spoiler.* Alternatively, the spoiler may be mounted at the rear
of the roof, or to the rear hatch lid at or near the top of the
hatch; in such a configuration the spoiler may extend no more
than 7.5” from the original bodywork, measured as described
above. The spoiler angle of attack is free. The rear spoiler is
measured from leading, attached edge to trailing or outermost,
free edge. Its measurement is independent of its angle of attack.
b. *The spoiler may not be wider than the rear bodywork, measured
as the maximum distance between the outside edges of
the wheel well openings or fender flares at axle height.*


Read it carefully then picture in your mind that E Mod Sprite's spoiler.
The *s are mine.

7. The use of front and rear spoiler endplates is allowed. Endplate
area shall not exceed spoiler height squared. A roof spoiler up to
the maximum of 7.5” is allowed an area of up to 16 square inches
for each endplate; a trunk spoiler up to the maximum of 10” is
allowed up to 100 square inches for each endplate. Side plates
do not have to be square or rectangular; the side profile shape is
open. If end plates are to be used with the front spoiler/air dam/
splitter assembly, a maximum area of 36 square inches per end
plate is allowed.

[jjackson]

Love to see pictures of yours Jay (IMG:style_emoticons/default/beerchug.gif)

Mine is boring-not allowed end plates in FP-Will post pix soon.JP is posting current correct listings for EMOD-BTW Randal get that front splitter out there-You're allowed 6 inches out and end plates.We increased our bumper profile for more splitter.100 sq inch end plates on rear-thats substantial and necessary-I did not go back and read the size endplates for front.JJackson

[jjackson]

Details, details....this ain't Prepared class.
From section 18.1

.

If end plates are to be used with the front spoiler/air dam/
splitter assembly, a maximum area of 36 square inches per end
plate is allowed.

Damn-there it is.JJackson

[Randal]

Pretty interesting rear spoiler. Man that puppy is huge.

I don't see any endplates in front.

[Randal]

He must have read the rule that JP just posted. Check out, what I think, is the new rear endplates:




Looks like he is following the 100 square inch option on those end plates.

[J P Stein]

He must have read the rule that JP just posted. Check out, what I think, is the new rear endplate.


Looks like he is following the 100 square inch option on those end plates.

Dude, he wrote the rules.

[Randal]

One that that I could do before Medford is just mount a big plastic spoiler to my existing reinforced spoiler with the mounting system in place.

End plates could be epoxied. Ummmm.

Probably the angle of attack would be to high.

[J P Stein]

I read some where/some time that a 65 degree AOA was the cat's ass for a spoiler.

[jjackson]

I read some where/some time that a 65 degree AOA was the cat's ass for a spoiler.

Read the same thing-Looked , but could not find article-We run ours at 66.Have spliiter test article though. Racecar engineering December 2009-Vol 19 No 12 has test info on splitters.JJackson

[PeeGreen 914]

What did you find in that article?
(IMG:style_emoticons/default/beerchug.gif)

[Randal]

What did you find in that article?
(IMG:style_emoticons/default/beerchug.gif)

This is pretty interesting.

http://www.racingbeat.com/mazda/performanc...eff-kiesel.html

[jjackson]

What did you find in that article?
(IMG:style_emoticons/default/beerchug.gif)

This is pretty interesting.

http://www.racingbeat.com/mazda/performanc...eff-kiesel.html

If you chase that car-you will get fast.Good Luck-Currently the most impressive autox car with fenders-JJackson

[jjackson]

What did you find in that article?
(IMG:style_emoticons/default/beerchug.gif)

That article tested downforce on an old mini cooper hill climb car.Using various size splitters and at different wind tunnel speeds (not alot of data-they did not test as much as I wish)The tests conclusively added downforce in even the smallest splitters (30 MM test) and showed 80 lbs of downforce on and 80mm splitter at 80 miles per hour.There tests showed that if your rules allowed-you have to run as much splitter as the rules allowed-that you could still balance cars handling
All that being said,hypothetically of course-if you had an autox car that weighed 435 lbs per front corner-and at maybe 70 (typical national level speeds in FP) the car weighed 70 ish lbs in front-so now front end has an increase of 35 lbs-so your 470 in front??maybe????
splitter weighs 5
76 bumper,mounts,frame-13
Noticed that you want car planted at 30MPH but for really fast times-it neeeeds to be planted at 70.All hypothetical of course.JJackson