I was looking into one of those in carbon, just wondering does anyone here have one and is it actually functional?

thanks

KYU

 

Best diffuser you can have is to remove your rear bumper

 

Yes, the function is to add weight.

 

Aren't APR one of the only manufacturers who wind-tunnel test their aero products?

Front and rear diffuser packages can be huge improvements to a cars handling, and i personally think the right ones look great even on a street car.

 

They can also have a detrimental effect.

If you're doing it for looks, fine but on the road it is unlikely that, for the vast majority of time, you will be going at a speed sufficient for a diffuser to have a significant positive effect.

Also, diffusers are typically design to work in conjunction with other aerodynamic devices e.g. front lip, flat bottom, rear wing

 

If you need I can just get the rear session from Password, it looks like this -

 

sorry to go slightly off topic but is it safe to run a flat floor on a road car?
i can imagine going through a big puddle and turning into a boat skidding along the top rather then sinking through it.

will you have to remove it for mot's so they can see drive train?

 

A lot of cars run undertrays, so no problem with MOT.

My Exige had one, and the R35 GTR does too.

I don't think there are any issues with the car turning into a speedboat

Agree with all the above though (which people have clearly copied from Dixon's advice on a recent thread )

 

It is completely legal, if its unsafe then all Ferrari, NSX, MR2, Lambo will fail MOT and skidding on the road as they all have complete flat undertray and sit only a few inches off the ground, you still have alot of travel until you hit the bottom, you damper would break first before you hit anything underside.

 

I've ordered an APR diffuser from evasive.

I believe they used it on their time attack s2000 so I'd say it works