can you explain how MIVEC works or is it just the same way as VTEC... btw has anyone heard the engine when the VTEC comes on... the sound is amazing and it feels like some turbo just kicked in giving you extra boostbone said:VTEC has actually nothing to do with SOHC or DOHC, you can as easily have an SOHC VTECT as a DOHC VTEC. a VTEC engine, has 1 camshaft extra, this one isn't used below 4K RPM, abover these RPM, due to a spring, this cam is activated, and opens the intakevalves a fraction of a second longer, allowing more mixture in the cylinder, resulting in more power.
VVTI on the other hand, is again sth else. as your RPM climb, your cylinders move faster, which results in the cam turning faster, resulting in the valves being open for a shorter time. VVTI rotates the cam a few degrees, allowing the intake valve to open sooner, letting more mixture in the cylinder.
andyhui01 said:... the sound is amazing and it feels like some turbo just kicked in giving you extra boost
The B18C is a great engine. You couldn't feel the VTEC engagement in a CRV because Honda designed it that way. It's an SUV for families, not a sports car - who wants a noticeable power surge in a vehicle like that? Honda designed it for a smooth transition. It's not becuase of the iVTEC, it's cause of the type of vehicle, and the market it's aimed at - Honda didn't want to give kids in the backseat whiplash. iVTEC is just Honda's next generation of VTEC engines.andyhui01 said:I sat in a Honda Civic with a B18C engine (Integra Type R 1.8l) engine... you know for sure that the vtec kicked in... after I get bored of turbo cars... I would look for a vtec car... do you know how the i-vtec works... on the new Honda CR-V... I floored the car and I couldn't feel the vtec kicking in at all :shock:
Not really true. My car utilises the VTEC technology, and there's no kick - it's still a smooth transition. The kick you feel is just the difference in the change of cams and timing.andyhui01 said:I think VTEC gets you a harder kick (all the power comes at once)... iVTEC smoothly gives you the power... so being a person who likes the feel of the turbo boost coming on should prefer VTEC over iVTEC
Yes, that's the whole point of VTEC. It lets you have a low-torque, granny-driving range that's fairly reasonable on fuel economy, but if you want to have fun, just keep the pedal down. It's true that low end torque is minimal, but believe me, for daily driving, I see no need to rev above 4000 in my car. And when I want to go, it's just a blip of the throttle, a quick downshift, and 1.6 litres singing at 8000 rpmlogo said:in both cases you have to rev the shit outta them to get the full power, i think! right? VTEC's torque on low rpms are not much and they don't gooo if the rpms drop