VVTi Query

[Unregistered_User1]

...a subtle combination of unclosed tags - I've fixed it now ;)

Cool cheers. My question still is unanswered...

"Is there any way to get the VVTi to kick in any earlier than 4500RPM? Why does VVTi need to wait until 4500RPM?"

[Fidgits]

I can answer the second part of the question...

VVTi kicks in at 4,500 or approx 100mph in 6th gear. This means at motorway speeds the car is more refined, and economy is better.

If you drive it right, take it to 6250rpm in first, and quick shift, you can keep it above 4,500 through the gears... well, I can only speak for up to third personally.. but thereby keeping the VVTi 'on'..

Why would you want to change it?

[imi]

I don't know about the VVTi, but i know someone who could changed the specs on V-Tec Engine.. He could make the v-tect kink in whenever u wanted it to, or even on all the time

So presuming it's under the same technology, one can find a suitable garage then it could be changed..

[Unregistered_User1]

Why would you want to change it?

If the VVTi kicking-in gives improved performance but you have to wait until 4500 RPM, then if it was flick-switch enabled you could have selective performance increase.

Would be a nice-to-have when some idiot comes flying up behind you on the motorway, so you move in one lane and then flick the switch and leave him trailing... tee, hee.

On a more serious note, VVTi surely not only gives improved performance but also improved MPG / efficiency so would be nice to have "switched on" permanently... unless someone can spot a reason why you would not want this to happen?

[Fidgits]

Would be a nice-to-have when some idiot comes flying up behind you on the motorway, so you move in one lane and then flick the switch and leave him trailing... tee, hee.

On a more serious note, VVTi surely not only gives improved performance but also improved MPG / efficiency so would be nice to have "switched on" permanently... unless someone can spot a reason why you would not want this to happen?

The VVTi does give improved MPG/efficiency... when the engine is below 4,500 revs, above 4,500 it gives improved performance... that is the point to all VTEC/VVTi engines, to offer both economy AND performance from one engine, depending on driving style!

And if someone comes thundering up behind you on the motorway, drop from 6th to third... :D thats your bye-bye switch :D

[GXE10]

sorry guys........ the hks vvti controller only fit chaser with the twin turbo engine....... not fot our car

[Zee007]

Why would you want to change it?

Would be a nice-to-have when some idiot comes flying up behind you on the motorway, so you move in one lane and then flick the switch and leave him trailing... tee, hee.

............ You could just get a Supercharger........... :D

[Fever]

What a great piece of advise there Mr Zee!

[altezzaz]

Whoa, whoa, VVTi is not the kick you get in the backside - quite the opposite; it works to change the times that the valves open - this means that the torque is improved across the rev range.

The kick you get at 4500 is when the second set of valves (8 and 8) start to work at maximum efficiency - each set is designed to work at different engine speeds to give a wide range of power.

That's probably a rubbish explanation, I'm sure someone else can do that in English... but it explains why the car feels like its pulling strongly at about 2500 rpm and again at 5k - it's where the 2 sets of valves are working best.

[yemgi]

Why would you want to change it?

Would be a nice-to-have when some idiot comes flying up behind you on the motorway, so you move in one lane and then flick the switch and leave him trailing... tee, hee.

............ You could just get a Supercharger........... :D

is the VVTi still working with the SC ? :iraqi-info-minister: :shutit:

[Zee007]

Why would you want to change it?

Would be a nice-to-have when some idiot comes flying up behind you on the motorway, so you move in one lane and then flick the switch and leave him trailing... tee, hee.

............ You could just get a Supercharger........... :D

is the VVTi still working with the SC ? :iraqi-info-minister: :shutit:

yep - it sure does........