Jimny VVT less power at low revs than non-VVT?

In standard cars the the VVT engines pull slightly better than non-VVT but the difference is barely noticeable. With gear reduction yours should have the upper hand.
Aside from servicing and mechanical issues, the engines do lose performance if never driven hard. Having owned a few ex-pensioner Jimnys, I've found a tank of V-Power and hard driving with regular visits to the rev limiter will restore lost performance.
 

Thanks for this. That's helpful, but doesn't it fit with what I was saying? E.g. At 3k RPM my car will be in the "low-performance cam profile", and may feel less powerful than a non-VVT at the same revs? If I drop down to a lower gear to increase the revs the car will switch to "high-performance" cam profile and will feel the same or faster than the non-VVT engine?

Does a remap allow for the VVT to switch to the high-performance cam profile at a lower RPM?

Thanks
Lee

tomlil01 wrote:

Thanks for this. That's helpful, but doesn't it fit with what I was saying? E.g. At 3k RPM my car will be in the "low-performance cam profile", and may feel less powerful than a non-VVT at the same revs? If I drop down to a lower gear to increase the revs the car will switch to "high-performance" cam profile and will feel the same or faster than the non-VVT engine?

Well sort of, but there is no way to know numbers without seeing some official dyno plots or output at a given rpm. There is nothing to say the VVT would be less, more or the same output as the non VVT engine down low. It could be any of them.

Although in any instance I'd expect it to be mild difference, not a huge one.

tomlil01 wrote:

Does a remap allow for the VVT to switch to the high-performance cam profile at a lower RPM?

Thanks
Lee

I believe yes, although it depends how the system is controlled and what access the mappers have to the settings. Probably best to contact and speak to some to see what they say. One mapper said that this was the case for the 4th Gen however, so I'd assume it is for the Gen 3.

I might be wrong but i am under the impression that the lobes on the cam are static on a suzuki so it is not how long it is open but how early or late. there is allmost no difference and no very noticable power gain, it just occurs at a bit different rpm.
Not like the Honda system where there is different lobes coming into effect at diffrenet times. (from wiki)
I would say that even if the VVT system is stuck and static there would be little noticable difference.

My Swift is a non VVT but it has 90hp on the m13 and my jimny had 80hp on its m13. Yes the swift feels like there is more hmmpf than the jimny but still no racecar and it is lighter than the jimny I think.

if there is a very noticable difference in power it must be something else.

I think it's just intake cam phasing on most Suzuki VVTs.  The ECU uses the cam and crank position sensors to decide what to do, and oil pressure is used to actually rotate the pulley.

Correct, it's just intake cam timing that changes. I wouldn't describe it as high power and low power modes. It adjusts the timing slightly so it's better optimised at higher and lower engine speeds. You won't gain a boost in power by adjusting the transition point.
I think this is a distraction anyway. The difference in performance your friend has noticed is unlikely to be related to the VVT.