Maybe this should be added to the archives? pretty good thread imo.

 

Lt.Dan...does a Hayabusa engine make 400hp?

 

Thanks to KYPREO for the pics and description... and before any of you get any illusions on setting up a nice motor like this... save your pennies... I'm sure this is a $25k set-up with F.I. management and accessories.

Cheers,
-Bern

 

I htink for a 13K redline you need hopes and dreams.

 

Ive heard of them making 310-330 At the wheel on the motorcycle. there is a guy near here in seattle i guess that has a turbo busa that is hella scarry. There is a video of hin rolling at about 180 MPH then rolls on it and at 18psi of boost it pulls the speedo from 180 to 230 in like 10 seconds. I guess its one of the fatest ones in the world, and hes like the only one thats done 230. pretty scarry stuff. I guess he does smoke shows rolling at a 100 mph.

CJG

 

yea, i saw that video. its intense. man id **** myself if i was on the back of that bike

 

motorcycles use a chain drive though, which exhibits almost no drivetrain power loss, so the flywheel horsepower is gonna more like 350 than 400. Put the same engine in front of a RWD drivetrain and it'll still be mad, I'm sure, but probably more like 250hp at the wheels, so the NA rotary still surpasses the Hayabusa turbo . That engine strapped to a motorcycle though - that is just plain suicidal.

As I said the engine was still making power above 12K rpm - increasing redline to 14K+rpm is said to be the next stage of development. The biggest stumbling block from reaching 14K rpm are the stationary gears as I mentioned earlier. word is Guru will soon be selling custom stationary gears that use a gear profile similar to that used in F1, that will not 'spread the teeth' so much, and won't exhibit harmonics.

these will cost around A$350 (US$230) for a front gear, A$650 (US$420) for a rear gear, and A$240 (US$160) for each rotor gear.

So for about US$1000 you can have that part of the equation sorted...which isn't that much when you think about it.

 

How about a chain driven, turbocharged, Hayabusa powered RX7? you could even use the bike's tranny... hehe... how awesome would that be.....

Dan

 

that would be different! I'll give you that.

 

try a yamaha R6 engine.
I know it revs to 15,500 and i think it has a 16,500rpm redline!! that is crazy i dont even know why they made it that high it makes peak power at like 10,500 or 11,000
But it is much weaker than the 'busa motor

 

Just when you think a thread is dead...

 

Carbons are good for 10.5k ceramics upto 13k


No - a large PP should flow upto 13k easy - never seen a side induction motor past 11k.Porting does not determine the redline... balancing and engine reciprocating weight does.
Speedway prepped 12A's down here in NZ would regularly sit on 11-13K for minutes on end... and PP's will flow beyond 13K.


Congratulations, you are the only one who gave a correct answer!!

The answer to the 13K question is - super lightened everything that moves!! Rotors/flywheel/small diameter clutch etc.. also electric water pump would help, but the number 1 rule for building a 13K 13B is CENTRE BEARING!!. Install a roller bearing in the centerplate and machine the shaft to suit. 13B's rotors are too heavy past 10K and result in the flexing of the eccentric shaft...this scores the side plates when the rotors start "rocking" in the housings. 12A's can rev higher while 10A's can rev to 10-11K stock. I have seen 13B's built for aviation with this mod pulling 376bhp @ 12.5rpm!!

Ive got a 13B PP im building with a friend - centre bearing/high compression lightweight rotors(was looking at getting alloy ones made up for beaucoup $$$) - should pull 350bhp easy @ the flywheel upto 13K.

 

wow, thats some good info that i never knew before.