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Silver State Classic (New member in the 200 mile Club)

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Old 01-06-2011, 08:38 PM
  #61  
Speedtoys
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Originally Posted by H2
Someone please tell me...what keeps the S4 from going airborne at that speed? The spoiler is relatively small and the downforce needed to stay on the ground at 209mph has to be tremendous. Has anyone used a pitot gizmo or something to measure this under the car?

H2
Actually, you would use a static port to measure pressure..a pitot measures air speed.
Old 01-07-2011, 11:55 AM
  #62  
Tahoe Shark
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Looking forward to seeing you George. This will be the year you get your jacket!
Old 02-22-2011, 11:15 AM
  #63  
cretinx
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so what kind of front lip / underbody aero are you working with?

how much power are you putting out?
Old 02-22-2011, 12:05 PM
  #64  
andy-gts
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hey tahoe shark

is the new zr1 going to see ORR duty,,,,that would be cool, 2 cars in the stable in the 200 mph club

andy
Old 02-22-2011, 12:49 PM
  #65  
mark kibort
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in order to get airborne, you need more lift than weight. even though the 928 or most cars are shapped like an airfoil, its not a ver good one. you can measure the effects of pressure drop on the hood and top of car with a preasure sensor. having done that at 130mph, i can tell you that it is not enough to lift the ar. -.08psi comes to mind. total area is near 90sf, so, only about 1/2 the car has this "vacuum", so thats 45sqf, or near 300lbs of lift . car weights 3400lbs, so you can see its a long way to taking off! But, if you are not balanced and the nose is lighter, and starts to rise, then the pressure under the car rises, and the pressure on top goes down and this changes EVERYTHING dramatically. so, this is why cars flip over at the salt flats. keep the car low to the ground, use air dams, and you only have a little bit of lift to deal with. this is why a wing i the rear is not such a great idea. its making downforce and most folks dont ahave enough downforce up front. thats a problem. Air dams, lowering the car, all keep the nose down. with out addiing downforce .
Originally Posted by H2
Someone please tell me...what keeps the S4 from going airborne at that speed? The spoiler is relatively small and the downforce needed to stay on the ground at 209mph has to be tremendous. Has anyone used a pitot gizmo or something to measure this under the car?

H2
Old 02-23-2011, 12:32 AM
  #66  
IcemanG17
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Originally Posted by andy-gts
hey tahoe shark

is the new zr1 going to see ORR duty,,,,that would be cool, 2 cars in the stable in the 200 mph club

andy
I think the ZR1 is more of a driver/track toy & the Beast is a dedicated ORR racer..... Tim did bring his ZR1 to Thunderhill when it was new!!! To say it has power is a MASSIVE understatement.....

I can honestly say the most powerful cars I have ridden in are these:

Cobra replica with a 540 Keith Black...it was stupid...anything more than 1/2 throttle would destroy the tires....but wheelspin at 80mph is entertaining...

A 95 Trans Am racer with a 422 ci LS engine with 725hp....slightly fast...

Tim's ZR1.....by far the "nicest" car of the bunch..but still massive power!!!

The Beast is no slouch either...but it felt different....like its just hitting its stride at 80mph....
Old 02-23-2011, 06:31 AM
  #67  
tilac999
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WOW!
Old 06-06-2011, 11:43 PM
  #68  
bcdavis
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CONGRATS!
Old 07-04-2012, 06:33 PM
  #69  
odurandina
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TURN ON SPEED CHANNEL....

They're covering the Silver State Classic on the show GEARS.



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