Exhaust blown diffusers and FIA restrictions/ban

[Ferraripilot]

In regards to reinforcing this ban. I find it quite difficult. First of all, 10% level compared to current level. What exactly does that mean? 10% of off-throttle downforce? 10% of exhaust velocity? 10% of exhaust mass flow rate?

If It was me, I would try and pump as much exhaust flow at off-throttle through the exhaust when demonstrating to FIA. This will maximise my 10%. hehee...

As for re-enforcing this. I think it is quite hard because you can read engine map information but they are not direct information.

The 10% refers to how open the throttle may be, with 0% being fully closed and 100% being fully open. The throttle is, I believe, controlled via the ECU and so may be policed there.

Silly question, but are F1 ignition and fuel mapping controlled via both TPS and MAP? If Whiting is stating the throttle can only be open 10%, there would be other ways of allowing air through the manifold but I suppose it would be difficult not calling this device a type of throttle, unless the wording is very specific stating 'throttle only'. This would mean the off-throttle device would remain dormant as a type of intake device and come into play only off-throttle. This would not be within the spirit of the rules of course, but legal per the letter of the law.

[hardingfv32]

Of coarse the engine configurations are now fixed, so you will be a very limited with what is possible in terms of physical changes.

Next idea....

Brian

[DaveW]

Next idea....

Driving technique/style (as mentioned earlier)....

[ianwit]

Ban now ratified after last nights meeting, should be interesting to see how it all pans out at Silverstone.

http://www.autosport.com/news/report.php/id/92374

[horse]

Renault FEE, was it ever successful?

I think it just goes to show that there is very rarely a single "wonder technology" that makes a car fast. Perhaps only active suspension really made a significant enough impact in isolation to the rest of the car on the Williams (although they did have an excellent power plant too). This years Williams is another indicator - great idea at the rear, but without the rest of the car working correctly they can't scrape up a point for 5 races.

That's why I don't think the blown diffuser ban will change the order that much. One piece of technology a fast car does not make.

[FrukostScones]

Very very nice EBD picture gallery! But dont ask me why it is starting with a 2010 Red Bull DD pic. (some beautiful 2010 Red Bull diffuser pics)

http://www.auto-motor-und-sport.de/bild ... how_item=0

teaserpic:

[hecti]

Next idea....

Brian

find a loop hole

[BreezyRacer]

These things are probably already being done to the max but

1. Minimize dive in the chassis under braking (trying to keep rear wheels loaded)

2. Make sure the beam and rear wing is optimized for performance at during braking chassis rake

3. Perhaps try more rear toe to aid in braking stability.

4. try to shift weight further down and back in the chassis, maybe even in the middle of the diffuser box. For instance RB could move the KERS battery into this location, provided it's legal, right under and forward of the rain light.

5. ad more low speed rebound to the rear, though this is a touchy thing to get right without unloading the tires.

Like I said they are already adjusting this stuff, it just that the optimal settings may change because of this rule change. The only new thing is trying to move weight lower and back in the chassis in the diffuser box itself. That would help braking and mid corner performance if they can do it without compromising overall diffuser downforce. The middle of the diffuser is the least important area normally, but given the current use of the starter motor hole as airflow feed it may not be worth the effort. Then again the starter hole airflow can branch off to the two sides and may work even better that way.

[hardingfv32]

"The only new thing is trying to move weight lower and back in the chassis in the diffuser box itself."

1) Weight distribution is prescribed by the rules for qualifying. So no moving weight to the rear.

2) Fact: Everything is as low as the overall design will allow from day one.

The rest of your recommendation sound good for a club racer, not an F1 car.

"ad more low speed rebound to the rear, though this is a touchy thing to get right without unloading the tires."

You think it is very hard to dial in the shocks on a 7-8 Poster Test System?

Brian

[Ray]

I wonder if Sebs championship will go like Jenson's, once the huge advantage is taken away he doesn't win another race. Not saying he will, but Jenson built a massive lead early and by then he wasn't home free but was able to take less risk. Maybe we'll see the same thing this season. Shame that the eggheads in Formula 1 come up with clever things ecery year and they are stupidly banned. This 'green' 'efficiency' bullshit is getting really old. More gas is consumed in the US on a daily basis that F1 would burn in 10 years. I wish the bullshit 'green' movement would go away, it's clearly driven by emotion rather than reason.

[hardingfv32]

WHY the 10% throttle number being discussed? Is this a concession to Renault for valve cooling?

You would think the normal of throttle condition would be closer to 2-3%.

Brian

[ringo]

I wonder if Sebs championship will go like Jenson's, once the huge advantage is taken away he doesn't win another race. Not saying he will, but Jenson built a massive lead early and by then he wasn't home free but was able to take less risk. Maybe we'll see the same thing this season. Shame that the eggheads in Formula 1 come up with clever things ecery year and they are stupidly banned. This 'green' 'efficiency' bullshit is getting really old. More gas is consumed in the US on a daily basis that F1 would burn in 10 years. I wish the bullshit 'green' movement would go away, it's clearly driven by emotion rather than reason.

Agree.

[ringo]

Next idea....

Brian

find a loop hole

It's not likely that 700 hp of hot air can be subsituted by suspension settings.

The exhaust simply needs to be allowed to work on the car in some way or the other.

[hardingfv32]

There is absolutely no evidence that RB's blown diffuser is any better than other competitors.

There is no evidence that the Renault engine produces better off throttle flow or that RB does a better job using this off throttle flow.

In Montreal the cars were on the brakes 20% of the lap, is there any data that shows RB having better braking performance? When Button was chasing down Vettel, did it look like the gains were coming in the brake zones?

Is the off throttle flow used at any other times other than braking?

Brian

[godlameroso]

Trail braking, or long slow speed turns that require you to go off throttle, a lot of turns in Hungary are like that.