Assuming it's the same as the Vectra, "Sport" causes the gear changes to be at higher revs (as you say) and also holds third gear (ie does not change to top).

There's also a "Winter" button, which starts off in third.

Hope this helps.

 

As said lets it rev higher and I also believe it'll change down a gear a little quicker if you floor it when it's in a higher gear cruising.

 

It deludes the driver into thinking it's an invinsible sportscar

Most daft when you see one on a Cavalier 1.8 Auto LOL!!

 

The only difference i ever thought (in a prelude mind you), was that it just held onto the gears for longer when you back off, instead of changing up a gear.

 

Yeh, just holds the revs (if you plant it) until just before the limiter before changing. Also makes the kick-down slightly more aggressive - taking into account the full rev ranges - instead of the normal 'economy' mode.

 

I think S mode does go into 4th.... once you are going fast enough it is essential to use it on the M27/A27 to get round the roundabouts after portsmouth

It also does provide a bit of a surprise for some complacent drivers who think 'oh look an omega estate, can't be about to go very fast...' then look surprised when they get left behind for a bit.

I use it a bit on long journeys when bored - i.e. when wanting to 'play' with the other traffic.

B.

 

So does it actually alter the engine mapping (i.e. the chip, the injectors, ignition etc) or just change the way the box behaves (i.e. make it change up at a higher revs limit)?

J

 

So does it actually alter the engine mapping (i.e. the chip, the injectors, ignition etc) or just change the way the box behaves (i.e. make it change up at a higher revs limit)?

J

It holds the gears longer, and changes them down sooner. But doesn't affect the mapping, you still accelerate at the same pace whilst in the lower rev ranges, but change at about 6000 rpm as opposed to under 5000 i believe. Also... it holds 3rd gear a lot longer, until well over 100 apparently but I can't back this up.

 

It holds the gears for longer and screws your mpg!

 

so if it's not altering the engine behaviour at all, then it's not altering MPG unless you plant your foot and make it accelerate hard. In normal driving (assuming 'normal' means 'not like the Dukes of Hazzard') it's not going to make any difference.

Is that correct?

if so, might as well leave it in Sport mode all the time?

J

 

Aha - as a last resort, read the manual...which says...

"Sporty programme, (sic) transmission shifts at higher engine speeds."

Guess that answers it.

J

 

Aha - as a last resort, read the manual...which says...

"Sporty programme, (sic) transmission shifts at higher engine speeds."

Guess that answers it.

J

Erm, isn't that what ALL of the above answers pretty much say?

You'd be better off leaving it in normal mode if you aren't going to push it, makes for a much smoother and more comfortable ride, as well as more economical as the changes will happen at much lower revs/speeds.

 

It holds the gears longer, and changes them down sooner. But doesn't affect the mapping, you still accelerate at the same pace whilst in the lower rev ranges, but change at about 6000 rpm as opposed to under 5000 i believe. Also... it holds 3rd gear a lot longer, until well over 100 apparently but I can't back this up.

Still in third at 116......

 

yeah, you're right, that's what everyone said. I guess I just had a faint hope it was a bit like chipping the engine. Never mind.

J

 

still in third at 119? IIRC the box on my meega shifts to 4th somewhere between 90 and 100 in S.

 

still in third at 119? IIRC the box on my meega shifts to 4th somewhere between 90 and 100 in S.

Well, it was just about to kick into fourth in sports mode, with the revs over 6k the speedo said 116 (So maybe actually nearer 110 in reality)...in my old 2.5 CDX estate.

I know I put 119...but that's what I get for inputing numbers with the numerical keypad....

 

still in third at 119? IIRC the box on my meega shifts to 4th somewhere between 90 and 100 in S.

In the Senator, it changes at 126 or thereabouts.

 

my omega changes at about 85 in sport )
and then doesnt really pull in 4th (
if it mapped my engine im told by a very good source that it would make around 165 bhp.
*mental note to self... do NOT get omega mapped. its a runabout untill im fixed or i get a V300*

 

yeah, you're right, that's what everyone said. I guess I just had a faint hope it was a bit like chipping the engine. Never mind.

J

If you fitted a performance chip, that was switchable, you could link the "Sport" switch to the chip to get what you're after.

In reality the GM autobox modes should be labelled Economy / Normal, not Normal / Sport, but that would have been negative for sales!

 

RE: Mpg.

Whether or not the engine is re-mapped, or whether you plant it or not, being in sports mode WILL reduce your mpg. This is bcause you are using more high revs. It is pure math, the more your engine revs, the more fuel it will use as the displacement of each cylinder is multiplied by the revs.

Obviously if you plant it, you will use more fuel because you are opening up the air fuel mix, and I'm sure there will be, at some point, a place where sport mode is actually more economical than normal. Finding that point will be extremely hard, and keeping to it will be nigh on impossible.

 

In reality the GM autobox modes should be labelled Economy / Normal, not Normal / Sport, but that would have been negative for sales!

I beg to differ - the manual says it's called "Sporty Programme" !! Who are we to disagree?

 

In addition to the gearbox holding the gears for longer I would say that the throttle feels much more responsive in S. When in normal mode the accelerator has to be pressed halfway down for decent acceleration. In Sports mode, you only have to feather the accelerator for half decent acceleration. Also, it kickdowns easier. In normal mode, you really have to get the pedal to the floor to activate kickdown, but in S, a little over halfway does it.

 

In addition to the gearbox holding the gears for longer I would say that the throttle feels much more responsive in S. When in normal mode the accelerator has to be pressed halfway down for decent acceleration. In Sports mode, you only have to feather the accelerator for half decent acceleration. Also, it kickdowns easier. In normal mode, you really have to get the pedal to the floor to activate kickdown, but in S, a little over halfway does it.

That's the drive-by-wire system for you, I guess that becomes more responsive too? (I only just learnt I had d-b-w in the Senator so i'm guessing the Omega has it too)

 

also in my 3.0 mv6 sports mode gives you some engine braking when you lift off the power, whereas in economy the revs drop back down. feels much better round the corners at speed

 

You naughty people, over 70mph