im going to look into this more i think im alreaddy sold

 

Sent my spare in, going to be doing baseline in the Gruppe which I already have then installing the ACD-Tuning and noting the differences over the coming season.

 

Here are my impressions of the ACD-Tuning autocross map

https://www.evolutionm.net/forums/ev...cross-map.html

 

very nice, looking forward to that

 

Just talked to Matt at ACD Tuning, I sent in my spare ACD Computer for a Custom Stage 3 Tune today! Can't wait to get it back for some testing!! I really liked the Differential Plate Swap Mod, it feels like a different car already, so with the ACD reprogrammed it really should be fun!!! Thanks Matt!

 

I also have the gruppe-s flash so am looking forward to your reviews. Just curious, what power and suspension mods do you have?

 

intresting stuff.
i watched a japanese evo video on track and the driver was switching between tarmac for some corners and gravel for others saying he had better grip in different modes so depending on the corner selecting a different acd option would help so you definately are on to something

 

I'm looking around ACD-tuning.com and there's some good stuff in there, thanks for the link.

 

Stock drivetrain, full Robispec racing suspension including hard bearings, slicks. This year i'm gonna run the 12 plate mod and the two computers and see which works best because I believe any ACD mod without a proper diff isn't enough to really justify the programming.

 

I agree with you half way on your 'needing a diff' statement. For serious racers, yes, a rear diff will definitley bring out the max potenetial of the programming. However, someone who just enjoys driving on the street will also enjoy the programming. It's not like the programming doesn't work if you don't have a diff. Didn't you say somewhere that you shaved seconds off your lap times with just the programming?

 

Yes it definitely works wonders VS the stock ACD programming on track out. I'm very excited to see how she handles now.

 

So... I've been thinking about having my ACD re-flashed and I was about to ask this question. Is it really worth it without a rear diff upgrade? These answers seem to be a bit conflicting

I have an OEM rear diff, but want that touch of controllable oversteer on corner exit at second gear speeds... 35-55mph. My car is mostly street driven. Didn't get to the track last year because of clutch problems. I want to do more track days this summer.

I know having a upgraded rear diff will get the most out of the tuning, but I just want to know, is this flash going to make a clear noticeable difference with the OEM rear diff? Is it worth the money?

 

Very interesting. I've been interested int he Gruppe-S flash but if this one is better then I'll be doing this in the future

 

You do not need a rear diff for this to 'work'...at all. You will absolutely notice a difference. The rear diff thing is for guys who race on the norm and are trying to eek out tenths of a second of lap times. The rear diff just really compliments the flashing of the acd. I don't want there to be any misleading info out there- I'm just trying to clear things up a bit is all.

Matt

 

they will both make a difference but together i think they will also compliment each other. also keep in mind the rear diff is not assembled properly from the factory