Landracing Forum

Tech Information => Technical Discussion => Topic started by: ulrace on March 07, 2005, 11:00:00 AM

Title: chopped stude cd
Post by: ulrace on March 07, 2005, 11:00:00 AM

Buiding a 53 stude tht's chopped with  rounded front fenders, very similar to the old 411 Burklands car. Can anyone give me an estimate for the drag coefficient? Need a number to plug into the Gearplit program.I'm just guessing it at .34 or so..  it's chopped to 6" windshield height. planning a full belly pan.
 thanks
 bob

Title: Re: chopped stude cd
Post by: John Beckett on March 07, 2005, 01:07:00 PM

Chopping won?t necessarily help the cd much but will reduce the frontal area. Which is a good thing. Your .34 is probably a reasonable number to start with. Once you get it on the Salt you can refine that number some more. May turn out to be even less: .33 or .32.
 
 JB

Title: Re: chopped stude cd
Post by: don pennington on March 26, 2005, 02:13:00 PM

Recently reasearching cd for 1994-2005 S-10 pickup I contacted a guy who is an aero engineer in the auto industry. He had info from GM comparing the S-10 to the '83 Bird and the '53 Stude. They sited the cd for the Bird and the Stude at .30
 
 The S-10 with all the Extreme stuff was noted at .33