FIA to clamp down on exhaust blown diffusers

True, although if it was them that originally caused the issue (going to the FIA) one would assume they where atleast looking into it. Infact I was sure they had already worked on it and where having issues.

Just like the RBR flexi front wing, its always a case if something is too expensive/hard/time consuming to copy, those who dont have it want to have it banned.
 
DRZ said:
Exhaust velocities are generally lower on turbo engines than their NA equivalents. The turbo gets in the way and as you want an immediate step-change in pressure either side of the turbine to be as efficient as possible, you generally find you have a wider exhaust pipe than you would want to run on an NA car (where a relatively high exhaust pressure is desireable). Wider exhaust pipe = lower pressure = lower EG velocity = less gas through the diffuser = less efficient diffuser = less downforce.
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The pressure my be lower but the volume is conciderably higher, The lower pressure is just a consequence of the larger bore exhaust.

Another advantage with turbo'd cars is the relatively constant level of exhaust gas blown into the diffuser once full boost has been reached, as the wastgate can be vented elsewhere whilst the turbo back exhaust is flowing the same amount regardless of RPM... Unlike an NA car.
 
MeEsH BaKkA said:
The pressure my be lower but the volume is conciderably higher, The lower pressure is just a consequence of the larger bore exhaust.

Another advantage with turbo'd cars is the relatively constant level of exhaust gas blown into the diffuser once full boost has been reached, as the wastgate can be vented elsewhere whilst the turbo back exhaust is flowing the same amount regardless of RPM... Unlike an NA car.
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The volume of air is higher but it is slowed by passing through the turbine (robbing it of energy) and slowed further by the drop in pressure caused by the larger bore of the exhaust. The net result is lower exhaust gas velocities.

The wastegate vents pressure before the intake rather than after it and overall gas flow is still defined by RPM as the engine is still effectively a pump, no matter what you do. You couldn't vent exhaust gasses between the exhaust valves the turbo as that is (currently) banned under the 2 exhaust exit rule.
 
DRZ said:
The wastegate vents pressure before the intake rather than after it and overall gas flow is still defined by RPM as the engine is still effectively a pump, no matter what you do. You couldn't vent exhaust gasses between the exhaust valves the turbo as that is (currently) banned under the 2 exhaust exit rule.
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This part is totaly wrong, you are mistaking the wastegate for a pressure relief valve I.e BOV/"dump valve" on the pressure side of the turbo. A waste gate controls boost pressure/turbine rpm by bleeding of exhaust gases (before the turbo ususaly in motorsport applications) and venting the gas either down stream of the turbo back into the exhaust or more commonly in race engines via a separate pipe.
Therefore the flow of exhaust gas through a turbo with a separated waste pipe (most likely still going to be used due to exhaust packaging in an f1 car) will be constant regardless if rpm (once at full boost).

Secondly what has pressure got to do with the amount of gas flowing through the engine??? Technically there will be more "air" going into (and obviously out of) the engine of a 1.6 turbo car than the current 2.4 V8s.

Thirdly, does a diffuser work on high pressure ;)

Edit: Have a look at this for an idea of what I mean about wastegates,
http://en.wikipedia.org/wiki/Wastegate
 
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MeEsH BaKkA said:
This part is totaly wrong, you are mistaking the wastegate for a pressure relief valve I.e BOV/"dump valve" on the pressure side of the turbo. A waste gate controls boost pressure/turbine rpm by bleeding of exhaust gases (before the turbo ususaly in motorsport applications) and venting the gas either down stream of the turbo back into the exhaust or more commonly in race engines via a separate pipe.
Therefore the flow of exhaust gas through a turbo with a separated waste pipe (most likely still going to be used due to exhaust packaging in an f1 car) will be constant regardless if rpm (once at full boost).

Secondly what has pressure got to do with the amount of gas flowing through the engine??? Technically there will be more "air" going into (and obviously out of) the engine of a 1.6 turbo car than the current 2.4 V8s.

Thirdly, does a diffuser work on high pressure ;)

Edit: Have a look at this for an idea of what I mean about wastegates,
http://en.wikipedia.org/wiki/Wastegate
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I accept what you mean about the wastegate, I'd confused the two in my mind when bashing out that post. It would have to vent back into the exhaust pipe in an F1 car anyway because of the exhaust exit regs.

Pressure has nothing to do with either of your last two points because volume of air shifted is irrelevant here. Also, a 1.6 turbo will probably have a lower rev limit than the 2.4s we have currently so that will make a difference to the volume of air shifted.

In terms of the diffuser, the idea is to create a pressure differential by allowing air under the car to exit more quickly than the air passing over the top, creating downforce. Air flow is critical to this but that air flow is secondary to the engine's needs which is why you don't see tiny nozzles out the back of the car generating massive exhaust velocities!

They also use some of the exhaust energy to deal with the vortices generated by the rear tyres and the air that spills out over the top of the rear wing end fences (look carefully and you will see slots in them to try and reduce the buildup of air pressure inside the rear wing at the edges which damages the flow and creates turbulence aka drag).
 
dannyjo22 said:
Yeah...

with Newey explaining that it's because many teams will have unreliable engines on their hands unless they are given time to resolve the issue.

I'm sorry but that's tough ****. So because a technical regulation that has been breached by x teams would make the cars unreliable the rest of them should just wait.

Wtf.
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Exactly, It's pure BS. If they aren't willing to readjust the way their engine runs then they should be told to leave it the **** alone, and be forced to ensure that the exhausts can ONLY exit via the bodywork. Strictly not the defuser,

Infact, do this for every team?! :confused:
 
I would agree on it being total BS, not sure how the Renault engine would be any less reliable. It has not blown up in the back of the Team Lotus car which had not been running any form of EBD let alone a hot blown one until last race.
 
they should just say that teams can keep the engine maps the way they are so as not to disrupt any reliability issues but make all teams have the exhausts exit up wards/sidewards with a couple of inches pipe clear of any bodywork.
completely nullifying the blown diffuser issue but keeping the reliability.

i know its a stupid idea but it would solve the problem.
 
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