All Things Mk5 > Performance Modifications
improving aerodynamics with OEM parts
RedRobin:
^^^^
Crikey! That's an awful lot of bedtime reading!
Unfortunately, in this country we don't get so many opportunities to reach 200 km/h.
Richn83:
That is a lot of reading! might help pass the friday afternoon at work :wink: I havent read any of it yet but my understanding is that the Aero drag only starts becoming affective from 60+ mph and increases exponentially (or at least in a non-linear fashion) beyond that point. For example if you double the speed you will increase drag or wind resistance by a factor of 4 or greater.
So these modifications would only provide any benefit at motorway speeds in the UK or track use, but even if you get a 10-15% reduction in drag this could result in a 10% reduction in fuel use at 70mph that could equate to a 3mpg decrease in consumption, but with the in-efficiencies of the combustion engine to use the chemical energy in fuel into kinetic energy in the car (read something this morning that said about 60% wastage of energy - heat, noise, un-burnt hydrocarbons) you might just save enough to cancel out the resistance of your air-con pump! :signLOL:
the bruce:
As I said at the beginning: don't expect too much. :wink:
Imho this package is practical:
- lowering by springs oder coilover
- VWR- or Votex lip or similar
- Zender winglip or Mk VI rear spoiler
- undertray parts
The undertray is just one aspect of the story.
cw x A may be reduced from 0.72 to 0.68 I bet.
Btw, the most helpful mod ist dropping the the car. :wink:
Richn83:
Yeah I dont want to lower my car as for my usage standard is more than adequate and would just be for show, yet I imagine that lowering and fitting a lip that forces the air around the car rather than under will significantly reduce the drag, I know the VWR lip they run on their race cars states this as its main use, for me doing this mod would be about a small improvement in fuel efficiency at motorway speeds, as unfortunately thats my main use of the car travelling off at weekends around the country.
the bruce:
Ok:
- lowering by springs oder coilover
- VWR- or Votex lip or similar
- Zender winglip or Mk VI rear spoiler
- undertray parts
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