FAO Titan

[glendog74]

Originally Posted by shimmy

T$

Dont forget his wide rubber is on a 4wd car do getting more power down

Any track with ling straights and fast corners wider front rubber isn't likely to help, just look at dragsters and their front to back rubber sizes

[TANKSLAPPER]

Originally Posted by glendog74

Ian,

Did you ever have rubbing issues with the 285 rears? Did you change the rear camber settings to allow fit under the arch?

TVM

No rubbing issues but they where on 18x10j with 20mm offset. 1.5 camber

The only issue you will have is the overall diameter is small than the 265 cups so the m track mode does not work well as the the car software works out the rear wheels are going faster than the front ie wheel spinning so it cut the power. speedo & mileometer registered 10% out ie @100mph was traveling 90 mph faster acceleration easier than changing the diff ratios

I run with the DSC off

285 rear have fantastic traction not only round bends but from a standing start. 265 front set up had great grip level no more under-steer at high speed but increased the over-steer, at slower speeds the feeling thought the steering wheel was poor.

The car generally felt under powered.

For me the Jury is still out on this one. I reckon the ideal tyre size would be 285 rear 245/255 front but no one makes them.

18" rubber is the way to go on track as you can run the curbs with stiffer suspension.

[glendog74]

Originally Posted by TANKSLAPPER

No rubbing issues but they where on 18x10j with 20mm offset. 1.5 camber

The only issue you will have is the overall diameter is small than the 265 cups so the m track mode does not work well as the the car software works out the rear wheels are going faster than the front ie wheel spinning so it cut the power. speedo & mileometer registered 10% out ie @100mph was traveling 90 mph faster acceleration easier than changing the diff ratios

I run with the DSC off

285 rear have fantastic traction not only round bends but from a standing start. 265 front set up had great grip level no more under-steer at high speed but increased the over-steer, at slower speeds the feeling thought the steering wheel was poor.

The car generally felt under powered.

For me the Jury is still out on this one. I reckon the ideal tyre size would be 285 rear 245/255 front but no one makes them.

18" rubber is the way to go on track as you can run the curbs with stiffer suspension.

Thanks for the info mate.

I'll be trying 18's next year:

Fr: 18 x 9.5J with 265 Cups
Rr: 18 x 10.5J with 285 Cups

Might be interesting

[TANKSLAPPER]

oh yeah

I forgot to mention the additional loads put through the chassis with the higher grip levels makes her moan like an old women.

You will need to change your bushes to ploy bushes.

T$

Sorry Titan for hijacking your thread.

.

[Dan]

Originally Posted by TANKSLAPPER

oh yeah

I forgot to mention the additional loads put through the chassis with the higher grip levels makes her moan like an old women.

You will need to change your bushes to ploy bushes.

T$

Sorry Titan for hijacking your thread.

.

Good info for us all, crack on I say mate

[titan]

Originally Posted by TANKSLAPPER

oh yeah

I forgot to mention the additional loads put through the chassis with the higher grip levels makes her moan like an old women.

You will need to change your bushes to ploy bushes.

T$

Sorry Titan for hijacking your thread.

.

no problem, it served its purpose ;-)

In evo-land, big rubber means a move to a dry sump system.

How does an M3 engine fare in this respect ?

[shane@mbtech]

Standard power you dont see too many issues with oil surge.
Most CSL cup cars are normal sump with no issues.

I reckon its to do with engine mounting difference
Longtitudinal vs transverse in evo.

[TANKSLAPPER]

I haven't had or heard of any oil starvation / surge, but I'm not the best person to ask and haven't run the wider rubber for very long on track.

I am of the same thinking as Lawsy

T$

[shimmy]

Originally Posted by titan

How does an M3 engine fare in this respect ?

pretty robust

[Curly]

Originally Posted by shimmy

#

pretty robust