Tyre Pressures/Fuel Consumption

[Vic_RSA]

Now the bulk of us have the stock rims for now but some have taken the plunge and gone to bigger/wider rims. I've noticed that if the stock 16" tyres that I have are not pumped to the recommended 240kPA there is a noticeable detriment to fuel consumption no matter how nicely you drive?

Anyone else noticed this. While these are performance cars, I'm curious to see what kind of consumption everyone is getting. My figures are poor due to sitting in traffic a lot lately - 8 - 9l/100km and some "spirited" driving...

And another (possibly pointless) question, what is the default display everyone likes to have on most of the time - actual consumption, average consumption or the odo/trip meters/outside temperature?

[Crewzern]

Originally Posted by Vic_RSA

Now the bulk of us have the stock rims for now but some have taken the plunge and gone to bigger/wider rims. I've noticed that if the stock 16" tyres that I have are not pumped to the recommended 240kPA there is a noticeable detriment to fuel consumption no matter how nicely you drive?

Anyone else noticed this. While these are performance cars, I'm curious to see what kind of consumption everyone is getting. My figures are poor due to sitting in traffic a lot lately - 8 - 9l/100km and some "spirited" driving...

And another (possibly pointless) question, what is the default display everyone likes to have on most of the time - actual consumption, average consumption or the odo/trip meters/outside temperature?

My last tank I filled I barely made it over 400km...my current tank will get around 450km .... car seems to be getting more economical as the km's are racked up + engen primax is in the mix

I set mine on odo reading ... dont like to see my consumption.

[sav]

Around 9.5-9.9/100km and instant consumption on the display.

[Ryan86]

I check my tyre pressures weekly, should be a habit...

Being at the coast the 86 performs better, so under normal economical driving I get 6.5 to 7 l/100 and then pushing go up to 8.8to 9l/100.

Stay on the average cons and watch the road

Did you not get hit the other day, was this cause you were watching your trip display. Hehhehehehhehee.

[Rayme]

I prefer to slightly over inflate my tires (it does makes some different on rolling resistance), but my winter tires are at the 36 psi recommended pressure so far...I'll see how they works out when it actually SNOWS, grrr. Winter is bad in everyway for fuel consumption, winter blend gas and cold temperature = the suck

[Vic_RSA]

Originally Posted by Ryan86

I check my tyre pressures weekly, should be a habit...

Being at the coast the 86 performs better, so under normal economical driving I get 6.5 to 7 l/100 and then pushing go up to 8.8to 9l/100.

Stay on the average cons and watch the road

Did you not get hit the other day, was this cause you were watching your trip display. Hehhehehehhehee.

The worst is the day the traffic stopped I watched the Vito behind me in my rearview - and breathed a sigh of relief when he stopped - then the arse in the Quantum ploughed into him...

[Vic_RSA]

Originally Posted by sav

Around 9.5-9.9/100km and instant consumption on the display.

Personally I think the instant consumption meter smokes crack ! the slightest of throttle inputs doubles the consumption!

[sav]

Originally Posted by Vic_RSA

Personally I think the instant consumption meter smokes crack ! the slightest of throttle inputs doubles the consumption!

Nope, that's how it works unfortunately. I've got a scanguage installed in my other car and it's the same - touch the throttle and the consumption goes up by quite a bit.

The computer is not 100% accurate though, it under reads by roughly 0.4-0.5l/100km.

[Ryan86]

Regarding the wheels and tyres.
I just read a article that indicates the 16" wheels on the std 86, is better performing and a more comfortable ride than the 17".

I wonder what is the best size for the 86? Giving both handling and comfort....

[Vic_RSA]

Originally Posted by Ryan86

Regarding the wheels and tyres.
I just read a article that indicates the 16" wheels on the std 86, is better performing and a more comfortable ride than the 17".

I wonder what is the best size for the 86? Giving both handling and comfort....

Years ago I got to test the new Mini's (1st gen) at Zwartkops airbase and got to try 15", 16" and 17" in succession and my favourites were the 16's for combination of feel and grip. The 15's were the most fun as they broke traction (175 width) most easily and the 17's gripped tenaciously through the slalom but gave no indication of when they would let go - which ended up being around the last cone.

I find tyres with a bit of a profile give you excellent feedback through the steering and seat of the pants feel in my experience.

[sav]

Originally Posted by Ryan86

Regarding the wheels and tyres.
I just read a article that indicates the 16" wheels on the std 86, is better performing and a more comfortable ride than the 17".

I wonder what is the best size for the 86? Giving both handling and comfort....

Not sure, I haven't driven a std spec yet but the ride with 17's is very comfortable in my opinion.

[Rossi]

I average around 9.5l/100km, can't get it any less, I have a heavy right foot, lol