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Tailgate aerodynamics.
Posted by Dave Westlake (more from Dave Westlake) on Fri, 9 May 2003 18:26:30
In Reply to: Next controversy:-), Richard Miller, Thu, 1 May 2003 08:54:00
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Today was our semi-annual "run what you brung" day at Lebanon Valley Dragway. There was a guy there runnung a stock 1/2 ton GMC pickup with a 350 and automatic transmission. He had removed the tailgate for better aerodynamics. and was pretty consistant at 16.2-16.3 sec. His best time was 16.2.
I asked him to try running with the tailgate closed. At first he looked at me like I was a complete idiot. I then explained this discussion and the theory that the tailgate creating a high pressure bubble in the bed allowing air to flow over it smoothly. He was still skeptical but finally tried a run with the gate closed. The ET with the gate closed was 15.9. Unfortunately I couldn't convince him to try it until the end of the day so he only had time to try it once.
It appears that running with the tailgate closed resulted in a 0.3 sec improvement in 1/4 mile time. I would assume that it would also increase fuel economy at highway speeds.
posted by 68.118.18...
Posts in this Thread:
- Next controversy:-), Richard Miller, Thu, 1 May 2003 08:54:00
- Tailgate aerodynamics., Dave Westlake, Fri, 9 May 2003 18:26:30 <-- Viewing This Message
- Get a torneau type cover, will have the best effect. nm, Phil, Thu, 1 May 2003 13:22:32
- neither :o), GM, Thu, 1 May 2003 12:24:01
- Up or down? here's a story...+, Noel, Thu, 1 May 2003 11:09:54
- Best milage when following a bigger truck., Jimbo, Thu, 1 May 2003 09:14:26
- No question, Justin F., Thu, 1 May 2003 09:09:04
- up, Jeff P, Thu, 1 May 2003 09:08:03
- It's the dimples..., chuck, Thu, 1 May 2003 09:01:34
- I'd say down..., FrozenSaab, Thu, 1 May 2003 08:59:03
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