se7ensport
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| posted on 29/6/14 at 09:51 PM |
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Stylus rear aero improvements - suggestions please
I have been considering a rear diffuser for a while, my hesitation has been that it might make things worse rather than better due to the shape of the
rear end and having open rear wheel arches that allow air in to the rear valance; the top black line is approximately the boot floor so everything
below that point that curves forward must be adding drag (happy to be proven wrong).
Options:
1. Allow the air to exit from this area by cutting out most of the lower black line.
2. Add diffuser that goes under diff to the seat pan, but I suspect air will still end up in this area from the wheel arches.
3. Create wheel arch liners to reduce the amount of air funnelled to the rear valance.
4. Combination of 1, 2 or 3.
5. The difference is so negligible I'd be better off doing sod all and keep the rear lines clean.
 
Stylus rear
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ceebmoj
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| posted on 29/6/14 at 10:08 PM |
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I have not finished my car yet however it has a diffuser that looks like it would fit your car
 
Description
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cerbera
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| posted on 29/6/14 at 10:16 PM |
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Sorry, can't help with your question but here's another pic for inspiration if you do go ahead and make one 
 
Description
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se7ensport
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| posted on 29/6/14 at 10:27 PM |
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quote:
Originally posted by cerbera
Sorry, can't help with your question but here's another pic for inspiration if you do go ahead and make one
Looks very tidy!
Did you notice a difference with the diffuser? Are your rear arches open into the rear valance?
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cerbera
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| posted on 30/6/14 at 05:59 AM |
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My rear arches are open and I can't say I noticed a difference to be honest.
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Alfa145
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| posted on 30/6/14 at 08:05 AM |
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Option 5.
Just cut a hole in the rear valance to let out air that can be trapped. At normal road speeds diffusers are only visible features not functional
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jeffw
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| posted on 30/6/14 at 02:31 PM |
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Tend to agree with the above. Most diffusers are too far off the floor to have any real effect. I think extending the flat floor to reduce lift is
the only real way of doing it.
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