Crighton CR700W
- Jack
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Crighton CR700W
The CR 700W has a 690 cc engine, has a rated power of 220 horsepower and a 105 lb-ft (142 Nm) torque! This means that the CR 700W has a ratio of 319 HP per litre. It's more than an aspirated F1, Ferrari F2004 (309 HP / liter) engine. MotoGP is about 300 HP per litre! Crighton Motorcycles will only hand build 25 units in all, for around $ 116.000.
The CR700W has a dry weight of just 285.5 lbs (129.5 kg),
The CR700W has a dry weight of just 285.5 lbs (129.5 kg),
- Kwacky
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- Jack
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Re: Crighton CR700W
I did hear that too , nothing officially announced yet though .
If BSB use the same formula Crighton have to compute the cc then I think it would be eligible for the current supersport class , which it would dominate completely , not so sure how it would fare against a full on BSB superbike as it would have a deficit in hp but an advantage in weight , it could be interesting if anyone has the money and a sense of adventure .
If BSB use the same formula Crighton have to compute the cc then I think it would be eligible for the current supersport class , which it would dominate completely , not so sure how it would fare against a full on BSB superbike as it would have a deficit in hp but an advantage in weight , it could be interesting if anyone has the money and a sense of adventure .
- duke63
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- C00kiemonster
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- Kwacky
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Re: Crighton CR700W
That's one very rich team ownerJack wrote: If BSB use the same formula Crighton have to compute the cc then I think it would be eligible for the current supersport class , which it would dominate completely , not so sure how it would fare against a full on BSB superbike as it would have a deficit in hp but an advantage in weight , it could be interesting if anyone has the money and a sense of adventure .
- D41
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Re: Crighton CR700W
Jack wrote: If BSB use the same formula Crighton have to compute the cc then I think it would be eligible for the current supersport class ,
Why would the cc need to be computed??
Is it a rotary engine, or something else as equally snazzy....??
- Stonesie
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Re: Crighton CR700W
D41 wrote: Why would the cc need to be computed??
Is it a rotary engine, or something else as equally snazzy....??
Yeah it's a twin rotor Wankel, like the Mazda engine but much smaller.
https://www.crightonmotorcycles.com/" onclick="window.open(this.href);return false;
I'm not saying they can't get it road legal but with current and future emissions standards it would be a hell of an engineering challenge, the RX8 renesis engine has oil injection to keep the seals from eating themselves in no time which makes it a dirty engine for it's capacity and power, good fun to drive though.
Or with it being such a limited production there may be a loophole to make it road legal?
- Jack
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Re: Crighton CR700W
there are apparently a few differing ways to calculate the displacement of a rotary engine , the reason the old Norton rotary didn't compete in MotoGP was that Norton and the governing body used different formulae and were getting a different result on the displacement or so I am led to believe .
- StMarks
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Re: Crighton CR700W
I've got one of ^^ those in that picture...
Almost exactly the same, even the same colour & same black rubber tyres.!
Almost exactly the same, even the same colour & same black rubber tyres.!
- StMarks
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- Jack
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Re: Crighton CR700W
They have a trick exhaust system that creates a vacuum which draws in fresh cold air to cool the engine and outputs it with the standard exhaust , I'm not sure how emissions are measured but mixing a load of clean air with the exhaust gases prior to measuring emissions must lower the ppm of any particulates .Stonesie wrote:D41 wrote: Why would the cc need to be computed??
Is it a rotary engine, or something else as equally snazzy....??
Yeah it's a twin rotor Wankel, like the Mazda engine but much smaller.
https://www.crightonmotorcycles.com/" onclick="window.open(this.href);return false;
I'm not saying they can't get it road legal but with current and future emissions standards it would be a hell of an engineering challenge, the RX8 renesis engine has oil injection to keep the seals from eating themselves in no time which makes it a dirty engine for it's capacity and power, good fun to drive though.
Or with it being such a limited production there may be a loophole to make it road legal?
- kiwikrasher
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Re: Crighton CR700W
While that’s a clever application.. it’s like mixing your 5L of toxic chemicals in a 10L bucket of water prior to throwing it in the lake. The ppm reading is better but the same amount of pollutants are still being produced.
Happiness is not a destination. It is a way of life.
- Jack
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Re: Crighton CR700W
I realised that it was a "cheat" but I think it's more as a result of them wanting to cool the engine more than trying to have one over on the emissions laws and as I said I'm not sure how they go about measuring whatever it is they measure when checking compliance.
- Monty
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Re: Crighton CR700W
............. and apparently, no rider aids! Not sure I'd dare to ride that. **** fantastic thing though.duke63 wrote:220bhp and 129kg dry weight is a mental combination. Looks good too.
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- Cav
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Re: Crighton CR700W
With a good throttle map, surely it'd be really nice to ride? low torque, linear power and probably a really nicely balanced chassis. You don't have to pin it
- Monty
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Re: Crighton CR700W
He said one of his aims was to give people the experience of riding a 2 stroke MotoGP bike.
^2 stroke MotoGP bike
^2 stroke MotoGP bike
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- Cav
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Re: Crighton CR700W
They also don't want to kill all their customers. Technology has come a long old way with E-throttles which are infinitely mappable and all sorts of other tech. They could be beautiful to ride.
- D41
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- Jack
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Re: Crighton CR700W
Is 105 lb - ft low torque ? From a 690cc motor ?Cav wrote:With a good throttle map, surely it'd be really nice to ride? low torque, linear power and probably a really nicely balanced chassis. You don't have to pin it
The Ducati V4S is only 91 lb - ft from 1000cc
fwiw I think it'd be a real beast to ride but enormous fun and very satisfying when you got things right but very painful and expensive if you got things wrong .