New Vetter Challenge

[redyaris]

Originally Posted by tomauto

I wonder why the owner of the Honda 230l being air cooled chose to not have an air inlet for the motor to cool down. He stated that he would spray water on the motor to cool it down. Couldn't be good for the motor at all!

I suspect that the problem is that the air that does get inside the fairing is not being ducted too the engine and away from the engine, in a way that is effective for cooling. in general if you spray water onto an air cooled engine in the same way that rain would spray on it it is harmless.

[tomauto]

I wasn't worried about rain hurting the motor. It is from a dirtbike engine and those things are made to withstand about anything. I was concerned with the effectiveness of just spraying water on the motor and maybe missing a spot and the heat build up in one area damaging the motor

[Frank Lee]

One more thing that will make this year's contestants almost certainly unable to achieve the fe of earlier Vetter challenges is the inability to P&G.

[slime]

The last two motorcycles I had on the road were a Suzuki DRZ 400s Dual Sport and a Suzuki Hayabusa 1300. The DRZ was stock except for having the air box opened up with an aftermarket filter and a jet kit. No fairings and I never got worse than 52 MPG on my daily commute which included WO throttle on the interstate and some stop and go traffic. On back road blasts I would get over 60 MPG. The Hayabusa (fastest production motorcycle at the time and still one of, if not the fastest production bike) had dynoed 160 RWHP (bone stock from the factory 1.3 liter ) and weighted around 550 lbs. On the interstate, I never got less than 42.5 MPG usually got 45.5 MPG no matter how fast I rode. Did a 80 mile run after filling up one evening that included a stretch of construction zone (45 MPH) on 75 North. The high number on my GPS that night was 155 MPH. The trip took 1 hour and produced 45.5 MPG. The Hayabusa is very aerodynamic and designed for top speed. I know another person that managed to get well over 50 MPG on one with some minor tuning. Some pretty amazing stuff out there these days...

[redyaris]

The Suzuki hayabusa 1300 is not "...very aerodynamic..." it is very powerful,
...160 RWHP... It may have one or two aerodynamic "features", and that is all. If you want to see a "very aerodynamic" motorcycle go to the craigvetter.com web site.

[jkv357]

Originally Posted by redyaris

The Suzuki hayabusa 1300 is not "...very aerodynamic..." it is very powerful,
...160 RWHP... It may have one or two aerodynamic "features", and that is all. If you want to see a "very aerodynamic" motorcycle go to the craigvetter.com web site.

True, but as far as conventional high performance motorcycles go, it's the best overall shape available. It's the base for most Land Speed Racing efforts because of it's superior aerodynamics.

A modified design just went 311 MPH.

Compared to some of the non-conventional Vetter Challenge cycles it is pretty dirty, but so are all conventional designs.


Jay

[jkv357]

Here's a few links to Craig Vetter's site, in case some of you aren't familiar with his latest aero project.

Craig Vetter Fuel Economy better mileage

2011 Vetter Streamliner-Chap 41

2011 Vetter Streamliner-Chap 42

There's a ton more info and links buried in each page.

Latest Vetter Challenge is set to begin at Mid Ohio racetrack in a couple of days (July 22, 2011).

2011 Craig Vetter Fuel Economy Vintage Days

Should be interesting.


Jay

[dcb]

Jay, 150mph with a 50cc engine is streamlined 33% faster (200mph) with 26 TIMES the displacement is dogsnot by comparison.

http://www.youtube.com/watch?v=1U4bOtifdFU

[jkv357]

Originally Posted by dcb

Jay, 150mph with a 50cc engine is streamlined 33% faster (200mph) with 26 TIMES the displacement is dogsnot by comparison.

I agree- that is amazing! 50cc 2-stroke Aprilia, isn't it?

But 311 MPH, no matter what size engine, is not dogsnot! Remember, it's still a sit-on cycle and not fully streamlined.




Jay

[dcb]

quite a bit of aerodynamics over a stock busa actually, maybe a stretch job too, and what, a turbo?

The accomplishment is in the guys moxy on two wheels, not in anyone's understanding of power and aerodynamics methinks or some innate busa mystique, certainly not an exercise in fuel efficiency







470mpg on real roads with a 185cc bike is seriously impressive, on an economy forum anyway (and that was 26 years ago!! )
http://www.craigvetter.com/pages/470...u%20talks.html