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Old 02-19-2010, 10:22 PM   #21
burnboy
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i believe the wrx or impreza horizontally opposed "boxer" motor has a 90 degree crank. check it
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Old 02-19-2010, 10:23 PM   #22
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Originally Posted by mx6er View Post
I heard an 09r1 drive by me twice today, it had an exhaust and I must say holy , I know what my next bike is, that thing sounded sooo sick. YouTube vid cannot replicate the sound
I love my new R1, Just bought the graves exhaust system, can't wait to get my PCV and AutoTune so I can install it.
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Old 02-19-2010, 11:40 PM   #23
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Quote:
Originally Posted by Tony1K View Post
I love my new R1, Just bought the graves exhaust system, can't wait to get my PCV and AutoTune so I can install it.
At first I thought it was a highly modded v8 but then I saw it and was like what!? Second time I got a look at it and was like . It sounds like NASCAR or a racecar at the 1/4, there is a vid with decent quality on utube, yello 09 r1 with 2 bros exhaust. Sorry for rant but I just can't stop droolin over this machine. Looks mean as
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Old 02-20-2010, 07:04 AM   #24
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The eccense of riding is defying gravity by supplimenting inertia, defying the concerns of loved ones for the therapy of adrenaline.
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Old 02-20-2010, 08:45 AM   #25
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Engines?

Staggered cranks was used in the past; however it caused alot of opposing stresses on the cranks. Better balance was found in inline cranks and programming w the adaption of fuel injection. Not to say they arent still out there for signature engine vibrations etc.

Saab back in the early 2000's came out w their experimental "compression variable" engine... utilising a hinge and actuator on one side of the engine block to lift and lower the block changing the volumetric efficiency and compression ratio.

Vtec was cool by using oil pressure to collapse one set of valves and pressurize another set so when the cam lobe came around the pressure from the lobe would push down the lifter and the valve to allow additional air into the chamber.

Variable camshaft timing utilises a worm gear between the camshaft gear and the cam and a pressure valve to operate the worm gear drive to increase or decrease the timing of the camshaft while the engine is operating. Early models had only the intake cam; latest models have all overhead cams functional w a small, sprocket sized device controlling the whole system.

Variable intake stroke has all but eliminated the throttle all together by controlling how far the valves open on the intake cam by controlling lift via a 'third' camshaft that controls the camshaft lobe suppression into a roller to a valve, suppressed by a tappet.

Direct fuel injection allows precise control of the fuel using high pressure and electro-crystal actuators to overcoming the pressure of the compressed air mixture. Less gas, more precise measurements are needed and multiple spray patterns for each stroke can be set via programming.

Variable intakes change the runner length by using an actuator to change tunnel size and gap to the intake valves. Helps initial pick up when stabbing the throttle and torque.

Variable turbo charge pressures by turbine fin angle changes allows a variable turbo pressure to be used. Allows charge pressures at lower rpms and continual pressure at higher rpms. Changeover/crossover/redirection valves keep the system pressurized during shifts to prevent blow off and drop lag to around 1/10 of a second.

Fly-by-wire allows ECM control over the rider/driver when they are acting like idiots. Throttle can be lowered for traction control or when over revving. FYI, 'programming' from A/M manufactorers is usually just raising the potentiometer setting and causing the throttle to open more then operator request to make the vehicle seem faster and have more power. Hope the 600 bux was worth it.


Look over all the info above and remember the engine is basically an air pump. Fuel is easy... higher pressure from a pump, better control and injection duration. Air is where all the performance comes in. The denser, colder the air comes in the more efficient and power the engine has the potential to produce.
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Old 02-20-2010, 04:41 PM   #26
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I had a chance to listen to a new R1 today - that motor sounds so different than any other in-line four cylinder engine I have ever heard.
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