search for the -oversteer found here- thread. That's all you need.

 

If you only put them on the front, and that wide, you will get oversteer out the ***. Even with 5mm wider on the front I was having oversteer on the track. There are so many ways to combat understeer, spacers will help, but as suggested there are other ways to do it. I would suggest spacers on the rear also of a similar width.

 

i think 32mm is a little much but i dont think he will have "oversteer out the ***". i run 20mm front only so my rpf'1 clear my calipers and i cant get the rear to step out no matter ho hard i try on track. even had a very experienced evo driver/instructor try and tell me my setup just has too much grip in the rear lol.

 

Dunno, but I had very obvious oversteer on the first, 3rd, and last corners at Tsukuba to the degree that it wasn't able to be compensated with simply by adjusting driving technique. My car normally is very neutral with zero under / oversteer but only after months of trial and error, so I didn't want to mess with my alignment or damper settings.
Once I put the same size spacers on the back (20mm) it was fine again.
Other people I know who simply put wide spacers on the front, also had oversteer and had to dial it out with swaybar and alignment adjustments. So it is a normal situation from my experience.

 

how does widening the track improve grip?

 

Not sure if that's a serious question or not, so I will say just Google it, there is plenty of information online.

 

i did a quick read, and the two tidbits that caught my attention were:

- bigger lever arm effectively lowers the spring rate.

- changes the roll center

I need to think about these a bit, but for sure people to report that spacers make a difference.

 

ok.

People try and break it down technically (and often get into arguments lol).
But it really just comes down to G forces and gravity's effect on the car overall, and where the tires are contacting the road relative to that.

Think about, if you run around a corner of a building as fast as you can with your upper body as close to the corner as you can. To maintain balance and speed your feet will be wide apart (relatively) and away from the wall = Wide track.
If you then run around the same corner at the same speed with the same gap between your head and the wall, but also have your feet also as close to the wall as possible (narrow track), what will happen?

I can tell you that fitting 20mm spacers to my car has definitely increased the speed in which I can take corners on the track, and there is less noticeable tire squeal.

Widening the track has a similar (but not as great relatively) effect results wise as lowering the car's center of gravity.

Hope this helps.

 

it lowers the lateral load transfer allowing the inside and outside tires to be loaded more evenly.

 

Fixed the mismatched tyre and restack the rear diff plate before you do anything
The rear diff plate mod is more like correcting Mitsubishi decision on delivering USDM EVO with wrongly stacked diff plate to reduce noise but at the expense of performance

 

Well said....adding front spacers will reduce understeer by reducing the load transfer at the front axle. But I would not recommend running such high spacers at the front. This will increase the scrub radius of the front suspension, which will intern increase steering kickback under throttle, especially when one of the front wheels is starting to loose grip. This effect is also known as torque steer, which is only possible if you have an LSD diff at the front. If you have an open diff at the front, then the torque at both wheels will always be equal, and the torque steer effect will be cancelled out by equal and opposite steer moments coming from the left and right front wheels.

Simply said, adding those large spacers will change the steering torque response at the steering wheel, especially is you have an LSD diff at the front.

 

on an evo it won't be noticeable, the power steering is more than sufficient to overcome it. also because those who are running low offset wheels/big spacers also are running camber plates with large amounts of camber the increased KPI reduces the scrub radius.

 

I can feel torque steer/wander at the limit of acceleration grip with the factory wheels and with my 17x9 +35 mm wheels.

 

I run 20mm spacers front and rear with the standard wheels. Grip is better with them (the whole point) including under power out of corners although there are some cases where I will always spin all 4 due to the torque, I have never experienced torque steer at all.

Yes the steering got slightly heavier, but it was ever so slight, and far less than what happens when you lower the front of the car. It is / was only really noticeable when driving the car out of a parking space and at very low speed.
Having said this, I don't know if i'd go as wide as 30mm, that's a bit extreme.