zzkamikazezz

I'm not sure what that shows Certainly the pickup truck tailgate one isn't something that is obvious straight away, having the tailgate up you would think it would make things much worse, based on what happens when you stick your head out the window, but its actually better up.

I'm confused as there is so much at work with air flows, air speeds, turbulence, pressure, drag to try and really understand it all, especially when just altering a car that isn't an aero car to start with.

I thought it worth mentioning the other theory I'd come across as its an interesting way of thinking about it. Like I said I don't know what is right.

zzkamikazezz

Thats a bit different though as no pocket can form right? I'm way out of my depth here, just wanted to raise the interesting counter point I'd seen, I'm not the person to be discussing the theory of all this

MB

As I say, pockets don't exist, but you will get a low pressure area behind any object you stick into the airflow, including your hand. Ok it's a different area than the bumper but you get the idea.

It may help if I said I didn't cut mine to bits for fun, and that a fairly clever race guru advised me on it

The areas behind the wheels are key too.

Anyway, this thread is about weight saving and bumper cutting is naff all

zzkamikazezz

ye certainly enough companies have vented bumpers, I've always liked the ASM one, interesting I see that that Robrob went 'full retard' and didn't see much difference:
https://www.s2ki.com/s2000/topic/858...g/page__st__25

Ye, back to digging out the hole saws!

NicoS

Maybe the guy in the other thread is saying how leaving the tailgate up reduces drag, when looking at it you probably would think the opposite applied. But then the same is true with our wind deflectors which causes less turbulent air to get sucked into the driving compartment. Maybe the air underneath the car just gets sucked down and past the rear bumper rather than entering it in the same way as the wind deflector? if you's get where I'm coming from.

chanas

Might start selling it off but would rather do it as a job lot. Or buy another S in need of it all!!!

Open to PMs about it or parts.

chanas

Cashed in the tax last week.

Trailer got too.

Bit tight tho so have to put space saver on the car to get it on it!

chanas

Was thinking of something very thin or Perspex or similar. Hard top would make sense really but the cost!!!

Kitesurfer s2000

I think to get round the problem of the bumper causing drag a large turbo should be added with cooling mods, about 15k should do it .

zzkamikazezz

This thread may help:
https://www.s2ki.com/s2000/topic/904752-project-1050/

I see you've met Lee, the resident troll