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[smokin]

Horner says that the blown exhaust isn't the answer.

http://formula-one.speedtv.com/article/f1-rivals-overestimate-blown-diffuser-red-bulls-christian-horner/

Well, he would, wouldn't he? But it didn't do much for Ferrari at Valencia so maybe there's a grain of truth.

[Frosty]

2-3 tenths still a lot of time

[scotty]

Something interesting i read on jamesallenonf1.co.uk a few days ago might be related to this:

One interesting observation is that Red Bull has a setting on the engine, whereby the ignition is retarded on the over run, which maintains exhaust gas pressure even when the driver lifts off the throttle. This maintains the performance of the blown diffuser and keeps the downforce up when it’s most needed. It’s not something you can do for more than a lap or two as it damages the engine, but it gives that vital fraction of a second which keeps Red Bull ahead of the rest in qualifying.

[smokin]

Something interesting i read on jamesallenonf1.co.uk a few days ago might be related to this:

One interesting observation is that Red Bull has a setting on the engine, whereby the ignition is retarded on the over run, which maintains exhaust gas pressure even when the driver lifts off the throttle. This maintains the performance of the blown diffuser and keeps the downforce up when it’s most needed. It’s not something you can do for more than a lap or two as it damages the engine, but it gives that vital fraction of a second which keeps Red Bull ahead of the rest in qualifying.

Retarding makes the mixture too rich (I think I've got that right) which would cause fuel burning in the exhaust. Dangerous with a blown exhaust directed onto bodywork without the engine damage. Might work for short sprints, though.

[Hammer278]

MIght be the reason for their amazing qualifying pace. No harm using it on Q3 for that one important lap. Also maybe the reason for their early season reliability problems...but looks like they've got the measure of how to use it without abusing it. Assuming the theory is true.

[What's Burning?]

MIght be the reason for their amazing qualifying pace. No harm using it on Q3 for that one important lap. Also maybe the reason for their early season reliability problems...but looks like they've got the measure of how to use it without abusing it. Assuming the theory is true.

Wouldn't account for them just being able to walk away from the field at will in Monaco though. But it would help explain the race pace being much less impressive than their qualifying pace.

[smokin]

MIght be the reason for their amazing qualifying pace. No harm using it on Q3 for that one important lap. Also maybe the reason for their early season reliability problems...but looks like they've got the measure of how to use it without abusing it. Assuming the theory is true.

Wouldn't account for them just being able to walk away from the field at will in Monaco though. But it would help explain the race pace being much less impressive than their qualifying pace.

Nah. Vettel`s race pace is compromised by his damn finger stuck in the F-duct hole...

[racechick]

MIght be the reason for their amazing qualifying pace. No harm using it on Q3 for that one important lap. Also maybe the reason for their early season reliability problems...but looks like they've got the measure of how to use it without abusing it. Assuming the theory is true.

Wouldn't account for them just being able to walk away from the field at will in Monaco though. But it would help explain the race pace being much less impressive than their qualifying pace.

Nah. Vettel`s race pace is compromised by his damn finger stuck in the F-duct hole...

[Jamie]

It has made a massive change, and has been something to copy. I think it has made a difference to red bull really.

[SaintDean]

I watched something about the suspension bars having too much of a degree on them providing more than enough downforce.

FIA made them more aerodynamic. since ive read this they've had a tougher time.

from what i think alot of the stuff on the car or borderline illegal/legal. But fair play to them.

[What's Burning?]

With McLaren introducing their blown exhaust at Silverstone; In Valencia one of the commentators on SPEED mentioned that it's not the hot exhaust gas being blown into the diffuser itself that's creating the advantage, but the fact that the rules state that when you look at the bottom of a car, the only thing you can see is either floor OR exhaust. By moving the exhaust down it allows more room up on top to manipulate the design of the rear diffuser around the exhaust pipes and gain efficiency from it. I'm curious since I haven't heard that description anywhere else.

[Capt. Furious]

smokin wrote
Retarding makes the mixture too rich (I think I've got that right) which would cause fuel burning in the exhaust. Dangerous with a blown exhaust directed onto bodywork without the engine damage. Might work for short sprints, though.

Retarding the timing doesnt change the air/fuel mixture,it simply changes the moment when the spark plug ignites. Retarding is delaying spark, advancing the timing ignites earlier in relation to the postition of the piston to TDC(top dead center).

What this means is that some small amount of the air/fuel mixture has already left the cylinder & started to travel down the exhaust manifold........ but this idea is very unlikley to work.

If your engine can rev to 17000-18000rpm the piston will be traveling so fast the engine needs a huge amount of ignition timing advance just to give the fuel enough time to actually burn compleatly before exiting the cylinder.... any over run is a waste of fuel & will cost you power.

But if only used for qualifying i guess it could work............. but hey i dont design F1 cars for a living,so who knows how it really works? It would explain their constant quali advantage!

[Stealthgate007]

With McLaren introducing their blown exhaust at Silverstone; In Valencia one of the commentators on SPEED mentioned that it's not the hot exhaust gas being blown into the diffuser itself that's creating the advantage, but the fact that the rules state that when you look at the bottom of a car, the only thing you can see is either floor OR exhaust. By moving the exhaust down it allows more room up on top to manipulate the design of the rear diffuser around the exhaust pipes and gain efficiency from it. I'm curious since I haven't heard that description anywhere else.

I heard that also. I also had a good look at Mark Webbers car on pause when he was vertical after hitting Kovi. The whole underside was exposed giving everyone a good look at how they were ducting around the exhaust using the floor board. I hope Macca was paying attention.

[racechick]

Macca not sure about using the blown exhaust.

[Jabberwocky]

I had a Metro that had a blown exhaust, it failed its MOT.