how much turbo pressure does today's f1 engines have?

All that has to do with the power train, gearbox, clutch, fuels and lubricants, etc. Generally the mechanical side of Formula One.
lawnmower
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how much turbo pressure does today's f1 engines have?

Post by lawnmower » Thu Apr 05, 2018 8:19 pm

does anyone knows?

trinidefender
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Re: how much turbo pressure does today's f1 engines have?

Post by trinidefender » Thu Apr 05, 2018 8:32 pm

Somewhere between 2.5 to 4.0 bar gauge pressure is what I seem to recall most calculations coming out at.

lawnmower
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Re: how much turbo pressure does today's f1 engines have?

Post by lawnmower » Wed Jun 06, 2018 5:53 pm

trinidefender wrote:
Thu Apr 05, 2018 8:32 pm
Somewhere between 2.5 to 4.0 bar gauge pressure is what I seem to recall most calculations coming out at.
thanks, i think they have high compression ratio and low turbo pressure

trinidefender
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Re: how much turbo pressure does today's f1 engines have?

Post by trinidefender » Wed Jun 06, 2018 7:25 pm

That was bar (atmospheres) not psi, that's between 36 and 58 psi so in other words high turbocharger pressures as well

J.A.W.
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Re: how much turbo pressure does today's f1 engines have?

Post by J.A.W. » Thu Jun 07, 2018 9:28 am

ATA is AFAIR, the correct metric, rather than bar - for forced induction pressure - values..
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Tommy Cookers
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Re: how much turbo pressure does today's f1 engines have?

Post by Tommy Cookers » Thu Jun 07, 2018 10:05 am

most people talk of boost but mean absolute pressure
eg the 1988 F1 turbocharged engines were limited to 2.5 bar absolute not 2.5 bar boost

early in the current F1 Renault publicity material gave 3.5 bar (and we try to remember whether 3.5 bar abs or not)

strad
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Re: how much turbo pressure does today's f1 engines have?

Post by strad » Thu Jun 07, 2018 8:55 pm

This part has always confused me:
The bar is a metric unit of pressure, but is not approved as part of the International System of Units (SI). It is defined as exactly equal to 100,000 Pa, which is slightly less than the current average atmospheric pressure on Earth at sea level.
I always thought it was one atmosphere. 14.7?
Motorsport without danger is like cooking without salt
Sir Stirling Moss

trinidefender
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Re: how much turbo pressure does today's f1 engines have?

Post by trinidefender » Thu Jun 07, 2018 9:36 pm

Tommy Cookers wrote:
Thu Jun 07, 2018 10:05 am
most people talk of boost but mean absolute pressure
eg the 1988 F1 turbocharged engines were limited to 2.5 bar absolute not 2.5 bar boost

early in the current F1 Renault publicity material gave 3.5 bar (and we try to remember whether 3.5 bar abs or not)
Renault didn't specify which they were referring to did they?

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Re: how much turbo pressure does today's f1 engines have?

Post by Maritimer » Thu Jun 07, 2018 11:08 pm

strad wrote:
Thu Jun 07, 2018 8:55 pm
This part has always confused me:
The bar is a metric unit of pressure, but is not approved as part of the International System of Units (SI). It is defined as exactly equal to 100,000 Pa, which is slightly less than the current average atmospheric pressure on Earth at sea level.
I always thought it was one atmosphere. 14.7?
The Bar is 14.5 psi, close to atmospheric average but not the same

strad
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Re: how much turbo pressure does today's f1 engines have?

Post by strad » Fri Jun 08, 2018 1:37 am

Thanks but I know that now. It's just that for most of my life I thought 1 BAR was 1 atmospheric pressure. wasn't till a few years ago that my mis-conception was pointed out to me.
Came up when I was talking with someone about how my supercharged cars pounds of boost compared with other machines that measure the boost in BARs.
Motorsport without danger is like cooking without salt
Sir Stirling Moss

gruntguru
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Re: how much turbo pressure does today's f1 engines have?

Post by gruntguru » Fri Jun 08, 2018 1:37 am

lawnmower wrote:
Thu Apr 05, 2018 8:19 pm
does anyone knows?
A bit less than this Cummins.

https://www.youtube.com/watch?v=kqVwHJPV-XE

See dyno runs at 3:00.
je suis charlie

lawnmower
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Re: how much turbo pressure does today's f1 engines have?

Post by lawnmower » Fri Jun 08, 2018 3:00 am

Why did not turbocharged + supercharged this way in 1980's turbo cars? Crankshaft could get power from exhaust gas

Image

J.A.W.
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Re: how much turbo pressure does today's f1 engines have?

Post by J.A.W. » Fri Jun 08, 2018 5:19 am

Likely due to free-wheeling F1 turbo-tech ~30 years back.. being far more simplistic/basic..

& those Napier high-efficiency* turbo-compound set-ups - were predicated on continuous/steady-state running..
with the excess jet-thrust generated** - also being useful for propulsion..

*& they were 'multi-fuel' engines.. capable of running on (low-test) gasoline/avtur/diesel - as required.

**Also able to employ reheat/after-burner mode - for extra take-off power.
Dr Zachary Smith sez..
"Yes.. spare us your ridiculous remarks, you insensitive idiot!"

wuzak
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Re: how much turbo pressure does today's f1 engines have?

Post by wuzak » Fri Jun 08, 2018 5:43 am

lawnmower wrote:
Fri Jun 08, 2018 3:00 am
Why did not turbocharged + supercharged this way in 1980's turbo cars? Crankshaft could get power from exhaust gas
Keithe Duckworth did propose a turbo-compound engine, but it didn't proceed as the FIA said it would be banned after it won its first race.

wuzak
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Re: how much turbo pressure does today's f1 engines have?

Post by wuzak » Fri Jun 08, 2018 5:52 am

strad wrote:
Fri Jun 08, 2018 1:37 am
Thanks but I know that now. It's just that for most of my life I thought 1 BAR was 1 atmospheric pressure. wasn't till a few years ago that my mis-conception was pointed out to me.
Came up when I was talking with someone about how my supercharged cars pounds of boost compared with other machines that measure the boost in BARs.
Of course 1bar = 100kPa, and standard atmospheric pressure is 101.325kPa.

And 1 atmosphere (atm) = 101.325kPa

And it can be further confused - the pressure can be boost (pressure above standard or ambient pressure, depending on definition*) or Manifold Absolute Pressure (MAP).

The 1988 turbos were constrained to 2.5bar MAP, which is 1.5bar boost at sea level.

*In WW2 the British used boost, defined as pressure above the standard sea level air pressure (14.7psi). The Americans used MAP, measured in inHg. The Germans used Ata, which was a technical atmosphere absolute (ie not boost)