easylord
Newbie
easylord
Newbie
easylord said:
Sorry, not exactly what I had in mind. Can't troubleshoot it. I was trying to show the new Toyota Tundra-Yamaha Edition.
vector_1
Extreme
The engine in the Pontiac Vibe is a Yamaha head and block design.
The company I worked for at the time of the Vibe release in 02' did dunnage work for a supplier.
The company I worked for at the time of the Vibe release in 02' did dunnage work for a supplier.
TT670
Expert
Not only was the engine in the vibe from toyota.. so is the rest of the vehicle. Its a rebadged Toyota Matrix
TT670
Expert
pat the rat said:
Is there an echo in here? LOL
kyokushinkai
Extreme
In the near future Yamaha will use variable valve timing in their motorcycle engines, possibly other engines as well(sleds).. What benefits will that bring? more torque? power? Any tech heads to explain?..
LazyBastard
TY 4 Stroke God
Valve timing requirements change with engine speed, load, and objective. If you set the valve timing for peak power, the low end can be rough, and fuel consumption high. If you set the valve timing for smooth low end and low fuel consumption, performance will suffer. Variable valve timing allows you to get both. Smooth and efficient low end and cruising, but crazy power when you call for it. Haven't you noticed that your RX1 doesn't idle as smooth at 1500 rpm as a higher displacement chevy straight 4 does at 500 rpm?
craze1cars
VIP Member
Honda and a few others have been using variable valve timing for several years in cars...my wife's 2002 Acura TL Type S has it for sure, as do most (if not all) new Acuras. I imagine some of the regular Hondas do as well since some of them share basic motors. I'm not sure about how many other mfrs use it. If you want to read more about the technical workings and benefits of it, do some research on Acura (and likely others) and you'll find more detailed explanations.
Like Lazy said, it's one of several ways to allow combustion process to operate at peak efficiency at every RPM, instead of making some compromises at various ranges as fixed valve timing engines do. It's 100% a good thing from a smoothness/power/torque equation, but it does add complexity to an engine.
Like Lazy said, it's one of several ways to allow combustion process to operate at peak efficiency at every RPM, instead of making some compromises at various ranges as fixed valve timing engines do. It's 100% a good thing from a smoothness/power/torque equation, but it does add complexity to an engine.
LazyBastard
TY 4 Stroke God
Well for sure Honda (V-Tec), Toyota (VVT), Suzuki (VIS), Nissan (CVTCS) have it, probably some european engines. As for american engines... they seem intent on high displacement gas guzzlers still.
kyokushinkai
Extreme
Sounds great! I hope they put variable valve timing in the sled engines too, not just motorcycle engines..
