Anyone looking to do this and save yourself the cost of the core exchange, I've got an ACD controller for sale:

https://www.evolutionm.net/forums/sa...ontroller.html

 

Bump for 'options'

R/T, let me know when you're ready to pull the trigger...like I said, I've got the PERFECT map for you and that course!

 

Two looking at the motec myself coupled with a m800 plug in with on board knock module. The only problems I see is running a switch for the acd presets and different boost/fuel maps for different fuel and boost presets- ie track/street and also different acd sets for different tracks( time attack, hillclimbs

 

I've got a M800 and the MDC but haven't connected them together yet. The MDC gives you space for 4 custom maps, so you could leave one of them "street" and have the other three of increasing aggressiveness. IIRC, you will get a warning once any of your maps have lock values over 60% as that will start to wear out the ACD pump faster.

Dave

 

Great post for those weighing out all the options.

 

hmm sounds good mate - also looking at how to switch multiple acd and m800 fuel maps too.

Should match up nice to my shep stage 3 acd with a wavetrack lsd.

 

mega update - I know it's an awkward time in the season to be able to test the difference between stock ACD and a reflashed one (for anyone not living in Cali) but I'd like to start generating more awareness again

 

I pulled the trigger and got 2 maps from Matt at ACD-tuning.com and could not be happier... check out my review here

 

Just want to discuss a few things.... really just want to discuss the Motec. The motec unit does boast 4 maps to choose from- very cool indeed. Unfortunately, everybody who I have talked to about multiple maps and switching maps on the fly has shown no interest in this. No interest may not be the correct term, more of - too much going on. It is extremely difficult to race a 100% and have enough focus to switch maps going into certain turns. We all see F1 drivers do it all the time, but until you have driven on a road course door to door going however fast, it is very hard to remember to do that. That's why f1 drivers are f1 drivers.

I have also downloaded the motec software to see how it works- it's a simple solution- much simpler than stock actually (how the maps are setup). The motec unit only has 2 maps to modify per mode where the stock unit has 5 maps to modify per mode(not including ayc). This is the good thing it has going for it.

The bad thing is the price plus it removes ayc. Food for thought.

 

frankly with more ACD flash options, and even custom options available I think the MoTeC is only appropriate for cars like the cyber-evo and sierra-sierra that have a full team devoted to squeezing out every thousandth they could. I think most motorsport guys are (or should be) looking for a more simple solution where the ACD function will be improved over the OEM in every way, and they can just "set it and forget it" - MoTeC is overkill for most and I would even dare to say, without a few hundreds of hours of testing and customizing, not even an improvement in performance over some of the other cheaper options currently available

 

Thank you for the introduction. A few words from me now. I am interested and i work to find the best out of the ACD tuning for 2 years now. I was the guy that found out the way to read/write the Evo 7-9 ACD and now Evo 10. And also i made the first files and a lot of tuning to this ecus in order to offer the solutions that the guys need.

I'd also like to hear some impresions about the guys that used modified ACD files and i'm thinking about making a new thread about this.

 

TTT - I'm hoping members will read the first post to inform themselves of the benefits of the ACD reflash - and this thread has been stickied by the mods

 

As a Motec owner I'll agree with the last few posts about the need to do development to squeeze every last bit out of the unit. However, the base maps on the Motec are worlds better than the factory setup on the USDM cars...especially if you're heavy into left-foot-braking.

I'd say if you're a rally perv (like I am), Motec, Gems, Ralliart, etc. are really the only options, because you can contact rally shops for help with new maps. I haven't seen much mention about the ACD flashers doing anything with dirt maps. I'll also toss out there that when I'm driving my car at PP, I do swap back and forth between maps (tarmac, gravel, and snow - for really slippy dirt), but I'm not switching for a single corner, I'm changing the system 3-4 times in 12 miles. I'd agree with the tuners that its really not all that practical to have a specific map for one corner on a race track...though if we moved the ACD button to the steering wheel.

Not sure how the Motec removes the AYC in the Evo IX...they never came with them in the US so that's really a positive or negative in my book. The reason I'm told that they're typically removed in rally applications is that the AYC is simply one more component to break (possibly weaker than non-ACD diff), and running non AYC rear diffs is cheaper. I've never had a car with AYC, so I can't comment with personal experience...just what I've read.

One of the huge benefits of the Motec (and maybe Gems?) is the ability to lock the diff full time to allow you to limp the car back to service after breaking parts like an axle. I grenaded a rear diff a few years back and the car wouldn't go anywhere under its own power. When I went back at the end of the day to retreive the car, I clicked the ACD button into full lock and drove it right up on the trailer. Had I remembered about that trick when the car stopped moving, we could've limped it back to service and had a go at fixing the car.

Dave

 

Hey Dave,

I think you're absolutely right - though I will say that anyone who is involved in rally is fairly "heavily" involved, while most of the motorsport enthusiast population here are of the weekend warrior variety, which suits a flash like ACD-Tuning.

There is a huge need in rally for a wide variety of maps, going from a hugely different types of surfaces all in one race. I apologize, I was only thinking of track and autocross most of the time I was considering this modification.

 

I'm a weekend warrior just like everyone else the forum...I just know the Evo is more fun in the dirt...the rest of you guys just haven't figured that out yet.


Not to worry - and good point, which made something pop into my head. I know that the guys in the Denver region for auto-x sometimes have different setups for asphalt and concrete...I wonder if it'd be worth looking at developing maps for different surfaces (for that last 0.0xx).

The other thing to consider about stage rally is that its more of an endurance and/or survival thing, so most folks aren't out there pushing 100%. A sterile track environment makes it much easier to reach that point and hit that one corner that's been giving you trouble over and over again, which brings me to the last point.

I think the takeaway message from all of this ACD tuning is - blindly making changes isn't likely to get you much improvement if you're simply basing the result on "feel" so guys doing testing with instrumentation and stop watches are more likely to get you a better setup.

Dave