Diffusers - any point?

[Herman Toothrot]

I bought a TAT shorty diffuser for my VX put it one and it looks good but I'm sure it doesn't really do anything. As its a bit heavier than the stock one and less weight at the backs better would it be a beneficial mod to go back to stock do you think? They really are just cosmetic?

a Googled example of what I have :-

Edited by Herman Toothrot on Sunday 10th January 17:45

[TIPPER]

That one looks nice but that's probably all it does!
Its too far away from the ground (and probably too small) to have any real effect (look at racing cars and you'll get the idea). It may help to clean up air flow out from out of under the car but I'd doubt you'd notice if you took it off.
(I'm not an aerodynamists btw - any limited knowledge I have in that area is restricted to boat sails!.)

[cyberface]

No idea whether the diffuser adds any material benefit to downforce at the rear, but that is a fine looking car

[Winstar]

Herman Toothrot said:

I bought a TAT shorty diffuser for my VX put it one and it looks good but I'm sure it doesn't really do anything. As its a bit heavier than the stock one and less weight at the backs better would it be a beneficial mod to go back to stock do you think? They really are just cosmetic?

a Googled example of what I have :-

Not one that short see this thread http://www.vx220.org.uk/forums/The-Jimsan-Diffuser...

[sdd]

They tend not to do anything other than look pretty on a road car. To get any sort of proper effect they need to run pretty close to the ground.

[Herman Toothrot]

Hum, with that in mind maybe I'll take it off and flog it.