SCCAForums.com

The 2008 SCCA rule book says that in SM/2
[QUOTE=SCCA]
M. Front splitters are allowed and shall be installed parallel to the
ground (within +/-3 degrees fore to aft) and may extend a maximum
of 6 inches forward of the front bodywork/fascia as viewed
from above. Splitters may not extend rearward past the centerline
of the front wheels. No portion of the splitter may extend beyond
the widest part of the front bumper/fascia as viewed from
above.
[/QUOTE=SCCA]

So without getting into the merits of the design etc, I just want to gather opinions as to whether or not it's legal before I make it out of anything other than cardboard and start testing.

 

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Chris
51 SM2

Yes, that is legal. I would shorten it up a little bit though, as that big of a splitter will create a TON of downforce, and consequently drag, on the front end of the car. I would make a few of them in different sizes, like 3", 4", and 6". I am going to be trying something similar on my car for this season.

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'77 Scirocco FWD SM Monster

No such thing as too much down force at 60-70 MPH top end speed.

Just remember to do a wing equally big out back.

 

I've been designing one like these in my head for awhile now.   Is yours going back to the front axe?

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Want to go faster, please send money.

The rules say it can go to the centerline.  I may stop at the front of the crossmember. 

And for the rear

 

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Chris
51 SM2

holy cone splitter.... you will chop them in half if you hit one. do too many, and you will get a bill from the scca at the end of the event...

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Hi! I'm Rodney. "Hi Rodney!" I'm addicted to Solo2....

Rodney:

holy cone splitter.... you will chop them in half if you hit one. do too many, and you will get a bill from the scca at the end of the event...

 

Then I could have a half off cone sale.......   Thanks, I'm here all week, try the veal!!!

 

SO... If I slice the cone in half, and the bottom stays in the box, no penalty right? 

 

 

 

 

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Chris
51 SM2

Make sure you figure out an easy way to take it off and put it on for putting it on/in your trailer.  Our XP car's splitter takes about 5 mins to put on.  Cotter pins, and then a 'wrap' secured with 5 screws.

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Jesse
-2002-2006 E-stock 93 MR2 (sold)
-2007-2008 XP Spyder

-- Glenn

geewiz:

My splitter looks exactly like what you are templating, Chris. And in fact, APR should now have a suitable pattern on file ;-).

And I have a strangely similar wing as well (shorter pedestal, though, to comply with XP rules)....

Jesse, I don't understand the pin & wrap mounting you are describing. By 'wrap' are you referring to a lip with five screws attaching the splitter to the air dam?

-- Glenn

 

The cotter pins hold the actual splitter up.

 

The "wrap" we have is a separate piece of cotton belting material.  It sits perpendicular to the splitter surface, and covers the area between the bodywork and the splitter.  Hopefully that describes it, as I don't have any pictures handy.

 

Of course, I'm awake before 5am because I'm going to an event this morning.... maybe I should bring my camera. :)   

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Jesse
-2002-2006 E-stock 93 MR2 (sold)
-2007-2008 XP Spyder

129STS:

 

Of course, I'm awake before 5am because I'm going to an event this morning.... maybe I should bring my camera. :)   

 

fuggin sucks... it is 20 degrees here... :(  i haven't run since topeka

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Hi! I'm Rodney. "Hi Rodney!" I'm addicted to Solo2....

geewiz:

My splitter looks exactly like what you are templating, Chris. And in fact, APR should now have a suitable pattern on file ;-).

And I have a strangely similar wing as well (shorter pedestal, though, to comply with XP rules)....

-- Glenn

 

If anyone is interested, I can help with custom or off the shelf APR wings/splitters. We've been supporting the solo community with carbon fiber and aluminum aero APR parts, including the large custom SM/2/XP dual element set-ups. PM or email for racer's discount.

"SO... If I slice the cone in half, and the bottom stays in the box, no penalty right?" 

we thought about this with an a-mod car and some tight piano string across the front wing. and just drive straight through a slolam :)

But i just looked in the rule book

7.9.1  "...If the pylon is upset or totally displaced outside the penalty limit, two seconds will be assessed..."

that makes it kinda gray. the rule says totally displaced. using this you could say the cone was not totally displaced.

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Alex Jones
2007 A-Street Prepared GXP
www.CrazyMonkeyRacing.com

because 285's were not enough...

DrJones_CMR:

"SO... If I slice the cone in half, and the bottom stays in the box, no penalty right?" 

we thought about this with an a-mod car and some tight piano string across the front wing. and just drive straight through a slolam :)

But i just looked in the rule book

7.9.1  "...If the pylon is upset or totally displaced outside the penalty limit, two seconds will be assessed..."

that makes it kinda gray. the rule says totally displaced. using this you could say the cone was not totally displaced.

no, but I am willing to bet that if cut in half, the pylon would be Upset.  

I agree the design is legal, just was a bit shocked at how big it actually was.  I trimmed it back a bit as I want to put an air dam around the front and that will make it a bit wider.  Prototype is cut out, but not attached yet.  The good news is you can get two of them out of one 4x8 sheet of material, but not one out of a 4x4 sheet.
 

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Chris
51 SM2

Part of the downforce generated is the negative pressure on the underside of the splitter.  You want to maximize that area, go all the way to the wheel ceneterline, and as wide in between the wheels as you can.  Just 0.10 psi of negative pressure adds up to quite a bit as the number of square inches go up.

 

ChrisSwearingen:

no, but I am willing to bet that if cut in half, the pylon would be Upset.  

 off topic -

I have only seen a cone get cut in half once and the lower portion stayed in the box. Sure the cone was badly damaged before the impact and should have been replaced before the event. Still a funny story thought :D

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Alex Jones
2007 A-Street Prepared GXP
www.CrazyMonkeyRacing.com

because 285's were not enough...

So I did get around to snapping a picture of the "wrap".

EDIT: the attachment won't work...

http://img254.imageshack.us/my.php?image=picture001bh2.jpg  (copy and paste)

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Jesse
-2002-2006 E-stock 93 MR2 (sold)
-2007-2008 XP Spyder