I think corners are a little more agressive and tight in auto-x vs open and flowing on track. When really asking the evo to turn tight using the front tires for anything other than turn-in initiates understeer at the limit.

When I say back on the throttle, at corner entry I mean enough that you're basically steady state ready so not decelerating or accelerating at that point. Then usually by an apex Im rolling onto the throttle.

 

This.

Pretty much how I approach corners on the local road courses.

 

This is a good thread. For anyone who has done the 8-plate mod at home, how hard is it? If I'm going to pay to have it done seems like 12-plate makes more sense. Go big or go home.

 

I haven't done it personally, I've got a TRE sitting in the garage. Here is a write up on doing 8 plate yourself:

http://evoempire.org/community/index...k-discsplates/

 

looks like a very worthwhile free mod. Will def try this in the event of me finding a heated garage space to do the work

 

I've heard that the 1.5 way is def the way to go with the 12 plate for a daily driver! If you're not happy with the power oversteer, then get your ACD reflashed and BOOM, you got MEGA oversteer action. Careful with drifting at that point. LOL

 

If you dont have tons of oversteer with the 12 plate, then you either have an issue somewhere else in your setup or suck at driving.

Its not some over powered RWD car where if you're understeering you can use torque to break loose the rear. Have to initiate rotation before loosing front grip otherwise more throttle will just make you push more.

 

I recently did the 12 plate upgrade (Weir plates). The car pretty much feels the same driving around on the street normally. I have not pushed it hard on the streets only during auto-x's and I can say that it definitely takes a little getting used to but it lets you come out of the corners quite quick and gives you oversteer pretty much on command for corner exits, I'm pretty happy with it. I would definitely recommend at least the 8 plate swap if you are going to do it on your own. Now, I've only been able to do one auto-x with it since I got it installed, but I did end up 1.5-2 seconds faster (on a 60 secondish course) than I normally seem to. Hopefully I will have more data next season.

 

I'm surprised ACD flashing/tuning has only been brought up a few times in this conversation. It's amazing what a simple flash can do to the handling of the evo. I've had the same results (1-2 seconds off autox time in 60sec course) as people who replace the rear diff.

 

Read the whole thread. Also, I've seen OP post here and there pretty often;

FJF, I think you'd be happiest with the 12 plate. I don't think the 8 plate rearrangement will make enough difference for you. Trust me, the 12 plate won't provide "too much" oversteer for the street or anything like that. Everyone whos got the Tre 12 plate considers it to be very controllable and linear, and I think once you experiment some with it in an empty parking lot you will have a good idea.

Anyone who's gotten the 8 plate is pretty much looking to stay in a particular class or to save some money. I went all the way with a Cusco 1.5 way Type RS, treated by Jon@TRE... couldn't be happier. I can go completely sideways exiting a corner in auto-x, or just neutral depending on how I control the throttle. Also, in the snow, even if I make a turn from dead stop in SECOND gear I can go sideways

 

2 seconds faster on a 60 second course is a lofty claim. What exactly is the stock ACD map doing wrong?

 

It is a lofty claim- and also true. On a road course there have been times when over 6 seconds a lap has been taken off. That example is on a 1:40 rd course.

The stock one doesn't do anything 'wrong'... think of it the same as the engine cont unit. The stock ecu does just fine for a stock car (sort of), but once tuned, you get massive amounts more power. This is the same thing.

This development is in it's infancy, so people say it's impossible- same as when ecu tuning came out. Can you imagine back in the day if someone told you that they gained 30whp just from an ecu tune and no other mods? We are all used to that now, so it's normal.

Matt

 

You don't have the skill to fight the car but you want the rear end to step out easier on the street?

I have done the STU rebuild and love it, but I have never put myself into a situation on the street where I was going around a corner with enough throttle to feel the difference. Autocross, sure. Maybe I am missing something here but I can't see why you would do this on a 99.9% street car since you need to be approaching the limits to really get the benefits.

 

That's pretty much the crux of the matter. I absolutely, positively do not want to fight the car. I want to be able to control it with greater degree of latitude. If that's not what I'm looking at, given my relatively modest level of skill, perhaps it's something we should talk about.

You quoted my comment where I answered that question. I didn't start this thread on a Driving Propriety forum and don't plan to continue it on one, as well.

 

Oh, you're one of those "the streets are an acceptable place to test the full limits of my car" people. I guess that the tire wear, brake pads, etc should have been a clue.

Good luck, try not to kill anyone.