Track Car Bumper Cut Outs

[chrispy.clio]

I'm basically after any information or pictures of anyone who has cut a section out of the rear bumper so it no longer acts as a pararshoot ( < cant spell it)

I've seen lots of 106's and saxo's do it to their rear bumpers.

Has anyone done it to their 172/182

Thanks

 

[Tony Hunter]

Be easier to put a flat plate underneath I would have thought.

 

[Clio-Ell]

Remembered seeing this at a race.

 

[Tony Hunter]

Good find that,well done.

 

[maynard]

What's the purpose of doing that?

 

[Steviant]

reduce drag

 

[chrism09]

are u doin this for track or street ?

 

[chrispy.clio]

Be easier to put a flat plate underneath I would have thought.

Yeah i did think about making up a sheet. Not 100% sure where to attach it to tho. One end to the rear beam and the other end bolted on to the bottom of the bumper!?

Remembered seeing this at a race.

Cheers mate thats spot on. Just what i wanted to see

What's the purpose of doing that?

The rear bumper catches lots of air and by cutting a little section out like the picture then there less drag.

are u doin this for track or street ?

Well the car is my track car and daily driver. I wander is its still road legal if i chopped a big section out of the rear bumper. Hmmmm!

 

[Hutchie]

we did it down the exhaust side and then put a bit of tin between wheel well and rear bumper

 

[barker22]

stick a traffic cone on the front, should balance it out a bit :rasp:

 

[Nick_P]

There was a ph1 at castle combe today with huge speed holes in his rear bumper...

 

[Whiteley]

Daz's

[youtube]6-TucDbEqu8[/youtube]

 

[Curtis!]

Was going to mention that one ^

Would probably look properly ace with a nice 182 exhaust on show.

 

[_WILL_]

Does this really make much difference, or is it just for the look?

 

[Jay Payne]

Yeah i did think about making up a sheet. Not 100% sure where to attach it to tho. One end to the rear beam and the other end bolted on to the bottom of the bumper!?

What, the bit that moves? :S

 

[Bazzon]

Really can not see the point for the tiny tiny gain, its a for a track day car not a F1 car.

A flat floor with a properly designed front splitter and diffuser maybe, but still its a track day!

 

[Jay Payne]

Well said Adrian

 

[Bazzon]

I could fully understand wanting the possible aero gains that maybe achieved if you were entering top end motorsport, but just chopping a part of the bumper out make no sense to me.

Having just read alot of the "competition cars aerodynamics" book matt (icarus) suggested id be staying well away from any aero changes unless i fully understood the maths behiind it or had a proper way of testing it.

Hey Jay, had alook round the race car last weekend, was very impressed. Was going to have a word with tony but he was very busy.

 

[andybutlers]

The phase 1 if it was black it belongs to paul he is on here his user name its paulya610 i think he will tell you if it makes a difference or not