6G Celicas Forums

What a diffuser did for my car, lol, sorry dan you asked for it, love ya buddy

I really like the idea, and the one you have looks REALLY clean.

However with that said, I don't take my car above 110 (or really, above 85 most of the time). Even the stock GT engine will only get you up to 120. I would understand a little bit more if we were achieving speeds of 150+, but I don't think our cars have enough power to really use this to their advantage.

However, it does look really sweet. I'm glad someone did it, I just wouldn't find it as practical as it should be (for me at least).

-TC

^^ another reason (appart from the tank issue why he is talking gtfour specific^^

Actually you dont have to go high speeds to benefit a diffuser. At average speeds of around 30-40mph when I fallowed this car in the rain, one obvious thing we noticed was the way the air reacted in the air.
The rain water was being lifted and blown out the back smoothly like line of haze. (Difficult to explain) where as before whendriving in the rain, when lookingin the rear view mirrir, you just see massive sworls of rain being flicked up.
This has improved the airodynamics of the bottom rear of the car reducing alot of drag. This means is should help improve your MPG as we've noticed last weekend during motorway driving.

If you look at new cars like the toyota prius, they too have a simple diffuser in the rear to do the same job to improve fuel efficiency.
And if you have a low down car with fron splitters, and side skirts, you dont need to go fast to get the Venturi Effect which creates the down force.

http://refraction.co.uk/blog/2009/05/03/so...-for-an-f1-car/




No particular reason. TBH we're quite happy with this universal one. It's proven to be effective on track with other cars already and it does the job. however it's not the most visually appealing and I'm curious if anyone else has tackled this challenge for the GT4.
The GT4 isnt the only car which has the same like a highbumper and low tank. The RX7's also use brackets to mount it's diffusers and it works better as a under car spoiler with the gap.
If this diffuser is fitted to a non GT4 6G, it'll sit flush to the bumper and looks alot better then the GT4.

How much will they be?

They're £160 plus postage. You're in newcastle so it should be £15 postage.

Are the bonnet vents ready yet? as I may get them all at the same time...
Are the diffusers ready to ship? JAE is close

This post has been edited by Driveby: Sep 2, 2009 - 1:37 PM

edit: nvm i'm totally thinking the wrong way,

but extended out to the edges of the car on the bottom side of the exhaust like FDs?
and It might be more of a bumper fix than a diffuser fix.

This post has been edited by playr158: Sep 2, 2009 - 1:41 PM

i want one bu i dont own the gas tank protector and for some reason i think my tanks hangs lowers than stock so it may be a no go for me but we will see

I'd be worried if you didnt have a tank protector.
I'd be even more worried if your tank hangs lower then normal GT4's do too because they're already really low!

We did try to adapt this which I think is for the Skyline R34

However when we did a simple air flow test (with a jet wash and an industrial fan ) the water didnt flow out as smooth as the universal one with the blades. When angled up so it closes up against the bumper it was even worse and looked like it made no difference then not having one.

I'm down for one and I'll make it fit the GT rear end. I'm often at those higher speeds [3S-GTE BTW] and I think it could only help. What would postal be to US?

This post has been edited by DEATH: Sep 3, 2009 - 8:08 AM

I'll definitely take your word for it. So from your experience, it's actually better to use this diffuser with a body kit installed (ie. TRD front and rear splitters with stock skirts)? Let me know what the MPG change is, if it's significant (even 1mpg) I'd definitely be interested.

-TC

Postage to the US is £30. If you'd like to order one please PM me. I can only make1 a day.

with the c-one aluminum underpanel and a rear diffuser on a lowered celica it should be effective. right??

http://www.nengun.com/c-one/aluminum-under-panel

i also remember there being a topic about somebody buying the c-one aluminum under panel and having somebody fabricate it

The C-one piece is for the front of the car and would help smooth that out significantly if there is no OEM plastics there.

Yes the undertray will help. Also skirts and front lip will help narrow down the air flow allowing air to pass under the car faster will induce the venturi effect creating down force.
We're currently working on a mid secton tray which will complete the flat under belly of the car.

sorry bit OT but anyone have one of those c-one undebody panels? Where does it attach? might make one myself

Any update on this? Are you looking to put them into production?

-TC

I would buy one for plain aesthetics. Count me in.