Fuel Economy

[brad]

Hmmm,

Here we go,


Rear Axle...

Camber - L 1.40 and -1.27

Toe 1.9 and 1.9

total 3.8

Front Axle

Castor 0.00 and 0.00

Camber L - 0.26 and - 0.22

Toe -0.1 and -0.1

Tyre pressures are 34 front and 32 rear

AAAhh! before you said rolling resistance which is very different from rolling diameter. I was wondering where you got resistance values from.

There's nothing in your alignment figures that would cause excessive fuel consumption.

The Castor figures look odd though. I would have thought most modern cars would be running at least 3degrees +ve castor. It makes no difference to tyre wear or economy though.

Front camber looks a fraction conservative - If the adjustment was available I would run more like -0.5 to -1 but if your tyre wear is even then -0.25 is right for your driving style.

Is that toe-out on the rear? 3.8mm(?) total toe-in seems an awful lot.

Tyre pressures might go up a fraction but it depends on sidewall flex & how you drive.

[qsilverza]

Hi, yeh they were quite good sports about changing them. Very happy about that, though I think he should have steered me away from them in the first when I asked what he thought.

My bad, Yep Rolling diameter

Still getting slight vibration at speed but otherwise it seems to be a hell of a lot better in nearly every aspect though I haven't pushed hard yet.

Maybe the vibration is from one of the wheels...

AAAhh! before you said rolling resistance which is very different from rolling diameter. I was wondering where you got resistance values from.

There's nothing in your alignment figures that would cause excessive fuel consumption.

The Castor figures look odd though. I would have thought most modern cars would be running at least 3degrees +ve castor. It makes no difference to tyre wear or economy though.

Front camber looks a fraction conservative - If the adjustment was available I would run more like -0.5 to -1 but if your tyre wear is even then -0.25 is right for your driving style.

Is that toe-out on the rear? 3.8mm(?) total toe-in seems an awful lot.

Tyre pressures might go up a fraction but it depends on sidewall flex & how you drive.

[spritle]

weird to have that.

any issues with the consumption?



I went from the Dunlop SP200E 175/80 14's (stock 1.6) to Yoko A509 215/65 14's and didn't have any issues (other than it gripped better).

It's currently sitting on Yoko C drive 215/60 15's. More steering vibration than when it was new but then it's got 110K kms and poly bushes on the front wishbones.


I've heard of others putting 225/50 16's on stock rims but didn't hear about them having issues.