2 stroke thread (with occasional F1 relevance!)

[autogyro]

Yeah as long as you never have a misfiring

Not if it was opposed pistons.

[uniflow]

70 Hp @17500 rpm now for a 125cc N/A engine, Kart racing.

[gruntguru]

600 bhp/litre! Way better than the current turbo F1.

Now - what about fuel economy?

[J.A.W.]

What's fuel economy?
Its for racing, not a (false) economy run..

Actually Uniflow, got any more details?

[uniflow]

http://www.kiwibiker.co.nz/forums/showt ... gine-tuner

This link will take you to a forum where Frits Overmars posts. Recent posts have been on this new engine, much speculation.
Last few pages.

You might want to look at this forum also
http://www.kiwibiker.co.nz/forums/showt ... et-Foundry

[Andres125sx]

So speculation or reality?

There are 1182 pages on that link, I´m not going to read it

[Andres125sx]

600 bhp/litre! Way better than the current turbo F1.

560 actually

And the comparison is absurd, current turbo F1s have the potential to get more than 2000bhp if not restricted by rules, what would be more than double of those 560hp/litre

1986 engines provided up to 1300bhp on qualy configuration with 1.5 litre displacement, that´s 866hp/litre.... 30 years back

What's fuel economy?
Its for racing, not a (false) economy run..

Not most important factor, but weight has some importance too, if you need to carry a big fuel tank that´s an issue

[J.A.W.]

Thanks Uniflow..

& @ A-125.. Where did you pull the "2000hp" figure from? Kindly cite references..
Or is it yet more made up/wishful thinking - from you?

As noted previously: forced induction brings weight/complexity/cost penalties in train with its power...

[uniflow]

Show me a N/A 125cc fourstroke that will even come close? Not a chance.

[Andres125sx]

Thanks Uniflow..

& @ A-125.. Where did you pull the "2000hp" figure from? Kindly cite references..
Or is it yet more made up/wishful thinking - from you?

It´s called development

Anycase ignore that figure if you want, 866bhp/litre, or 666bhp/litre on race configuration in 1986, that´s a fact

Do you think that figure would remain the same 30 years after? How much do you think it could have improved after 30 years developing ICEs?

[uniflow]

So speculation or reality?

There are 1182 pages on that link, I´m not going to read it

You should read it, you might learn somthing.

[Andres125sx]

....

the car was throwing out 1400 horsepower and just kept on pushing — you felt like you were sitting on a rocket.

From this link:
http://www.gtspirit.com/2014/05/31/the- ... -car-ever/

Also in the same link:

It must have been around 1,400 horsepower; we don’t know for sure because the dyno didn’t go beyond 1,280 horsepower.

And before you ask who is Paul Rosche...
http://www.enginelabs.com/news/paul-ros ... -80-today/

That was before turbo boost was restricted from 5.5 bar to 4 bar, then to 2.5 bar, then turbo engines were banned. General info about history of F1 engines here
http://en.wikipedia.org/wiki/Formula_On ... .80.931986


So a four stroke turbo engine provided more than 900bhp/litre 3 decades ago.

[Andres125sx]

Show me a N/A 125cc fourstroke that will even come close? Not a chance.

N/A? Why? Any more reason apart you want two stroke to win?

Because it is directly comparable in utilizing atmospheric pressure - perhaps?

Not when someone says that kart engine provides more specific power than current F1 engines, wich is the reason I posted that, because the comparison is ignoring how restricted current engines are

[Abarth]

[[...]So a four stroke turbo engine provided more than 900bhp/litre 3 decades ago.

...for about 10 laps or so.

So you do think that such peak figures could increase about 40%, from 900 HP /Litre to 1250 HP /l?
In which fields do we need the improvement, and where can we possibly find such huge increases?
Can we find the additional increase in Pmep and/or revs without blowing the engine after 10 seconds?

[Abarth]

[...]
Not when someone says that kart engine provides more specific power than current F1 engines, wich is the reason I posted that, because the comparison is ignoring how restricted current engines are

Well those kart engines are restricted too...they hove no turbocharger