Cross plane GEN 3
- Thread starter Ked0607
- Start date
Hype and sound sell
mark3evo
Registered
according to a 2011 journo
On the Yamaha YZF-R1 crossplane crankshaft, however, the throws are spaced at 90-degree intervals, resulting in a 270-180-90-180 firing sequence. This unevenness helps rear-tire traction by giving the tire one larger interval during each set of four firing pulses to better maintain grip; it also reduces inertial losses by requiring only two pistons to come to a stop during any TDC or BDC event. The end result is a marginally more efficient engine that provides improved off-corner acceleration as a result of better rear-tire grip under power. So, while the 0-to-100 times and 400-meters numbers of the new Yamaha YZF-R1 Crossplane might not be appreciably different than those of the YZF-R1 without Crossplane, the newer Yamaha YZF-R1's lap times on a road-race course-as well as its point-to-point E.T.s on a twisty backroad - are likely to be better in the hands of a capable rider.
By the way, though the term 'Big Bang' is often used by people to describe the new crossplane Yamaha YZF-R1, that is not a correct representation. The term dates back to the two-stroke GP race motorcycles of the late '80s and early '90s when four-cylinder two-stroke race motorcycles would fire two cylinders simultaneously, hence the 'big bang' moniker. I believe it started with inline-fours, such as the Yamaha TZ750, later versions of which fired its cylinders in pairs at 180-degree intervals instead of separately every 90 degrees. The concept ultimately evolved to V-four that fired in pairs at anywhere between 67- and 90-degree intervals, depending upon their Vee spread. This meant there was between 293 and 270 degrees of freewheeling, respectively, before the next firing sequence to help the rear tire maintain grip off of corners. Since no two cylinders fire simultaneously on the new Yamaha YZF-R1 Crossplane, calling it a big-bang engine is incorrect.
Yamaha always seemed to be playing with engines....they had their YICS (Yamaha Induction Control System) engines then went to 5 valves which were stellar...those early FZ750s were potent...I raced against them and they were a challenge.
Yamaha also had a few awesome 2 strokes in the day as well...
Yamaha was my 2nd favorite manufacturer after Suzuki...the FZR1000 I had was a great bike and very much on par with the GSXR.
I actually really like Yamahas.
They have made some of the best 4wheelers ever, their Star cruisers are really impressive, some with fully adjustable suspension, as well as alot of street inovations.
The same quality is found in their musical instruments.
I've just never been an R6/R1 fan.
I personally dislike the steering on all of the many models that I rode, and find them all to be underpowered, lacking any low to midrange punch at all.
I also think the "R"1 was genious marketing, as had it just remained the yzf1000, I doubt it would have ever gained it's cult following.
As said, hype sells, lol.
I do have to admit though, the cross-plane sound is kind of cool,
but, as you know...I'm just a Suzuki guy.
TonyM995
Registered
Exactly. It’s amazing and sad how well hype/buzz words sell certain products.
With a Busa, I’d think it would be less about performance and more about having something different. The justification of cost is that it makes you excited and you have the money.
This guy did it on his Coyote powered Superformance and it sounds awesome. Really it’s a sick car that I like and am using this thread as an excuse to share the video.
Cool car, it sounds good, but I think I'de get tired of that sound, and want the coyote howl back.
The right hand drive with right hand shifter is strange too, but still, much respect for the skill and ability to build it.
The right hand drive with right hand shifter is strange too, but still, much respect for the skill and ability to build it.
pcs
Registered
the voodoo in the gt350 is a flat plane crank engine and the 5.2 predator in the gt500 is a cross plane. those 2 engine dont sound similar at all. they are both are nice cars and i do like the the gt350.
pcs
Registered
lots of brochure jargon. they left out the fact that in order to control primary vibrations they added a gear driver balance shaft that increases the weight of the engine and internal frictional losses. also when moto gp teams switched to the big bang firing order, they did make less hp than the “screamer” engines.according to a 2011 journo
On the Yamaha YZF-R1 crossplane crankshaft, however, the throws are spaced at 90-degree intervals, resulting in a 270-180-90-180 firing sequence. This unevenness helps rear-tire traction by giving the tire one larger interval during each set of four firing pulses to better maintain grip; it also reduces inertial losses by requiring only two pistons to come to a stop during any TDC or BDC event. The end result is a marginally more efficient engine that provides improved off-corner acceleration as a result of better rear-tire grip under power. So, while the 0-to-100 times and 400-meters numbers of the new Yamaha YZF-R1 Crossplane might not be appreciably different than those of the YZF-R1 without Crossplane, the newer Yamaha YZF-R1's lap times on a road-race course-as well as its point-to-point E.T.s on a twisty backroad - are likely to be better in the hands of a capable rider.
By the way, though the term 'Big Bang' is often used by people to describe the new crossplane Yamaha YZF-R1, that is not a correct representation. The term dates back to the two-stroke GP race motorcycles of the late '80s and early '90s when four-cylinder two-stroke race motorcycles would fire two cylinders simultaneously, hence the 'big bang' moniker. I believe it started with inline-fours, such as the Yamaha TZ750, later versions of which fired its cylinders in pairs at 180-degree intervals instead of separately every 90 degrees. The concept ultimately evolved to V-four that fired in pairs at anywhere between 67- and 90-degree intervals, depending upon their Vee spread. This meant there was between 293 and 270 degrees of freewheeling, respectively, before the next firing sequence to help the rear tire maintain grip off of corners. Since no two cylinders fire simultaneously on the new Yamaha YZF-R1 Crossplane, calling it a big-bang engine is incorrect.
Dopey
Registered
I agree with that on the old r1's but I had a 2018 in my shop over last season for a motor swap and all it had on it was a flashed ecu and that thing was kind of surprising but definitely not my choice of bike.
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