2-strokes in MotoGP?

[mhbarber]

It seems that the current crop of Moto GP bikes are outputting ~ 190 Kw.
If the teams had kept developing the 500cc stink-wheels, could they be putting out the same power? I'm not sure if technological similarities can be drawn with the just deceased 125's? Did they continue to get more powerful from 2002 ?

[Mental Trousers]

The rules could actually be changed to allow 2 strokes and any other sort of engine because the two main ones are

• maximum fuel capacity per race
• number of engines per season

Remove the 4 stroke 1000cc rule and it'd be a true prototype series again.

[haydes55]

The rules could actually be changed to allow 2 strokes and any other sort of engine because the two main ones are

• maximum fuel capacity per race
• number of engines per season

Remove the 4 stroke 1000cc rule and it'd be a true prototype series again.

That would be good! Imagine a 1400cc bike overtaking bikes like crazy down the straight, then the 1100s who lost down the straight, then get past them through the corners.

[AllanB]

A 'excess oil injection' button on the left bar would be the ticket - pass them, hit the button and smoke the buggers out.

[Robert Taylor]

It seems that the current crop of Moto GP bikes are outputting ~ 190 Kw.
If the teams had kept developing the 500cc stink-wheels, could they be putting out the same power? I'm not sure if technological similarities can be drawn with the just deceased 125's? Did they continue to get more powerful from 2002 ?

A 1 litre 2 stroke is going to produce more power than a 1 litre half time engine................

[Mental Trousers]

... and use twice as much fuel.

[BMWST?]

A 1 litre 2 stroke is going to produce more power than a 1 litre half time engine................

and use twice as much fuel at full chat

[ellipsis]

and use twice as much fuel at full chat

...as we are in dream world...so what...

[gammaguy]

A 'excess oil injection' button on the left bar would be the ticket - pass them, hit the button and smoke the buggers out.

Ummmm no.....that would just seize it

[Drew]

... and use twice as much fuel.

Not in real life, provided they were using injection.

380Kw from a 1000cc two stroke isn't realistic for the application. They have to manage a whole race, and more.

A forced induction two stroke, with four stroke like heads and valve gear is the action. But then you need tanked air for idle and low revs, and the weight starts a climbin' up pretty quick. Wouldn't need to burn oil though.

[Mental Trousers]

There's lots of clean burning direct injection 2 strokes out there. The big problem was they never made it into racing because of weight, complexity, cost and they need some sort of forced induction.

Would be great to see not just 2 strokes in MotoGP but any other type of engine, eg an efficient and durable rotary. It could be done using the fuel consumption and number of engines rules.

[quickbuck]

eg an efficient and durable rotary.

LOL If there is ever such a thing

It could be done using the fuel consumption and number of engines rules.

Well... if you increase the numbers significantly.....

Sorry couldn't resist......

But yeah, if you could get a gas turbine to use snaff all fuel that would make it interesting too... the 95dB limit (or is that 105?) would have to be increased to about 130!!

[Drew]

There's lots of clean burning direct injection 2 strokes out there. The big problem was they never made it into racing because of weight, complexity, cost and they need some sort of forced induction.

Would be great to see not just 2 strokes in MotoGP but any other type of engine, eg an efficient and durable rotary. It could be done using the fuel consumption and number of engines rules.

Direct injection only gets you so far with a two stroke. If I've learned anything from the Team ESE thread, it's that the exhaust scavenging system for the intake to work is the limiting factor. So camchain, valves, and pressurized inlet is one way to get around it.

In the model in my head, two pump systems for induction is best rather than a tank . Solid drive to get it running down low, (supercharger), and pressure driven for the higher revs, (turbo charger).

That way, the narrow power spread can be overcome too. And ya don't have to burn oil.

[F5 Dave]

There's lots of clean burning direct injection 2 strokes out there. The big problem was they never made it into racing because of weight, complexity, cost and they need some sort of forced induction.. . ..

. . .and the rules forbade it (hey that's probably the first time I've used that word). The FIM in their infinite wisdom, presumably as they were giving handies under the sheets to the Evil empire (H*nda) wanted to make sure 2 stroke performance increase was stifled as much as possible. Honda did actually test FI, but not direct injection.

Cost? you're kidding me? compared to now you could throw heaps at a 2 stroke & still not come close. Injection has shown decent fuel useage decreases.

[Mental Trousers]

Cost? you're kidding me? compared to now you could throw heaps at a 2 stroke & still not come close. Injection has shown decent fuel useage decreases.

They don't cost much now but a wee while back Direct Injection cost craploads. Costs come down significantly once a manufacturer gets something out to the masses, but before then it's farken expensive.