[Mk2] [Turbo] rear diffusers

[Owen @ Kent Car Craft]

I bet that yellow and red kiddy Cart hasnt got any HKS bits fitted LOL

[skinthespin]

No, but he's 3 years old............

[Spittinflames]

If you knew that why put a £200 piece of plastic tat on the underneath of your car? Isn't it the same as fake bonnet pins or Brembo stickers on your standard calipers?

What you mean it's the same as painting your calipers red

[RANDOMr2]

If you knew that why put a £200 piece of plastic tat on the underneath of your car? Isn't it the same as fake bonnet pins or Brembo stickers on your standard calipers?

i didnt buy it for my 2....

I bought it when i had my FD, which i recently sold and if you know anything about FD's theyre pretty smooth along the whole underside apart from the rear. Under the engine it has a cover that goes to the main floor plan and its mostly smooth under there.

btw, you can buy additional front diffusers for the FD aswell and probably make that fit the mr2s front easier than making a rear diffuser fit the mr2s backend.

end of the day, if it doesnt work aswell, it'll look good

[Andy.B]

Was about to say you dont want to be covering the whole floor pan of the mr2. As far as i know the cooling for the engine and everything in the ass end passes out from under the engine compartment, so with this diffuser it wont have much effect but it will smooth out the air flow around the exhaust area.

[hicks]

if i fit one it will be just for show like most bodykits are.

lets face it no bodykit out there has a positive effect on a car.

if you think its sad then fair enough, each too there own.

[Andy.B]

Id fit one not through function but more for style think they look the nuts on the FD so on a MR2 it would look

[rookie-racer]

what about a series two lotus elise difuser?

[RANDOMr2]

yeh ive seen those, they look ace. if you search for re amemiya diffusers, the 1st one they did was similar to those (if i have the right image in my head)

the one i have is the 2nd design

i'll try and it and see how much of a mission it'll be seeing as my fujisubo goes along the width of the car, that'll be the problem

j

[rookie-racer]

after a fiar bit of hunting....

heres a piccy of th lotus elise s2 showing the rear diffuser

[hicks]

elise parts sell em for about £400

tad expensive

[skinthespin]

The elise ones will do something though I suspect, I only painted my calipers btw as they were different colours when I bought them, one red and one black, so had to pick a colour........

I have seen the underside of an FD thank you and its not smooth enough to have much of an effect on airflow I dont think, it was just you were all getting so creamy over the diffuser i thought you thought it was actually useful, it is just a part of a body kit, if thats your bag then fine of course, but its just not mine.

Covering the whole floor of the MR2 wouldnt be so bad, sure theres some airflow around the engine just like most cars but the cooling for the fluids is done at the front of the car, the only real downside would be if you have an IC mounted in a conventional place.

[carzfookinfast]

If you knew that why put a £200 piece of plastic tat on the underneath of your car? Isn't it the same as fake bonnet pins or Brembo stickers on your standard calipers?

freedom of expression and a rear diffuser would look the b#llocks and how do u know it isnt going to give any gains u have obviously tried one before or you have a degree in aerodynamics perhaps at nasa? oh and my brake decal upgrade works a dream stopping distance has dropped dramaticly

[ryan]

If you knew that why put a £200 piece of plastic tat on the underneath of your car? Isn't it the same as fake bonnet pins or Brembo stickers on your standard calipers?

Image Replaced With URL For Quote http://i153.photobucket.com/albums/s208 ... brembo.jpg

freedom of expression and a rear diffuser would look the b#llocks and how do u know it isnt going to give any gains u have obviously tried one before or you have a degree in aerodynamics perhaps at nasa? oh and my brake decal upgrade works a dream stopping distance has dropped dramaticly

Well we're not all born with knowledge like Simon; some of us mere mortals actually have to learn by going to college/university etc.
With your vast antomotive knowledge Simon, why did you buy wheels for your car that don't fit
As for the diffuser, it could be a nice (if not functional) mod, if it doesn't melt from exhause heat, but then i'm sure someone will soon be along to tell me the melting point of fibreglass or plastic, or whatever its made of

[attercop]

freedom of expression and a rear diffuser would look the b#llocks and how do u know it isnt going to give any gains u have obviously tried one before or you have a degree in aerodynamics perhaps at nasa? oh and my brake decal upgrade works a dream stopping distance has dropped dramaticly

Haha.

And for his next trick he's going to tell the little boy that Santa isn't real and not to expect owt from the Toothfairy or Easter Bunny in future either

[skinthespin]

easy guys!

It wont do anything, thats pretty obvious, and I have been interested in aerodynamics a long time, hence I did my automotive engineering degree at Kingston, as they also do aerospace they have a couple of wind tunnels. I have also been doing a lot of looking into underbody aero's for the MR2 and hopefully will incorporate some of it into a competitive car, thanks for asking.

Ryan, someone had already said its viewed as more of a styling/bodykit thing than a functional item, and I said "if thats your bag then fine of course, but its just not mine", so why's that so bad? So I dont see how it would be a nice mod in the same way a veilside bumper or whatever there called is.

I bought the wheels btw as I think they will fit with a few choice mods (and they have ), whats the point in buying something that will just bolt on, wheres the fun in that and what does it prove? I can work a socket set? Oh great!

Oh, and carz, judging by both your username and the fact you have Brembo decals on your calipers i'm already ignoring anything you say..

[Jimbob]

Ok, People should chill on here, lol

The diffuser will do something, full stop. Much like sticking a huge wing on will do something, or putting little canards on the front of a bumper will do something. At the end of the day it is a wing under the car and any air, even if turbulent which flows over it will cause downforce. The qualitive effects of this cannot be guessed at, although my suspision is it will work at very high speeds only, i.e over 70mph officer!

Stick your hand out of the window and it pushes back, turn it a little and you need to apply a slightly upwards force to keep it level, that force may only be slight but it is pushing you and hence the car down by another little bit, so put a big fat surface at the back and it will push a lot harder.

As for veilside and Border they are two companies who pride themselves heavily on aerodynamic improvements through their products, border especially.

Simplistically if little wings don'y make a difference why are they spattered all over F1 cars. Ok before you attack that comment yes they go faster and are a total package and weigh naff all but any wing adds an effect, just be carefull its the right one, and you don't get masses of drag

Jim
BEng (hons)

P.S I think they look cool anyway

[skinthespin]

But a diffuser doesnt work in the same was a wing, the air doesnt push down but sucks, and if that air is extremely turbulent (which is will be) it just wont suck (ooer). having a laminar airflow is really important, hence one of the reasons overtaking in F1 is so hard, the cars are so sensitive to aeros and reliant on them the turbulent flow from the car in front has massive effects on the drivability of the following car.

Your right any wing has an effect, but if its adds drag and not downforce then surely that effect is negative?

I can see some of the thinking behind Border stuff, no way on Veilside, its pure rubbish.

[Jimbob]

Ok we agree.

Take a look at the veilside skyline its not poop it is aerodynamic, I agree some of the other stuff is daft.

[skinthespin]

Cool! lol

I can't say I've looked at Veilside Skyline tbh, and non of the other stuff for long enough to study them as I'm usually gagging in the corner.....