Ya its safe to drive without the acd ecu. You will notice it not handle the same, but its fine. My car is gonna be down for a bit, as soon as I get the plan going I may be able to let you borrow my old school Gruppe-S modded acd ecu. Let me know if you need to borrow it.

Current suspension mods during time of that pic was oem kyb w/ robispec springs, tanabe front swaybar, version 1 of the TRE rear modded 1.5 way max lock diff. since then ive only really done whiteline bumpsteer bushings and the whiteline steering rack bushings. Tires are 255/35/18 star specs on enkei rct4 18x9 +35.

To be fair the oem kybs are over 10 years old, have 60k miles on them. They have done me well so far though, for what they are.

 

thanks just need to pull the car in the garage.

probably need to look to moving to a full coilovers first

 

Ya I think its coming down to that point where I honestly could use the upgrade and benefits of a coilover. At this point Im points limited in my class though, so I need to stay with the oem setup at least one more season.

 

yea, probably suspension just needs some work.

as others suggested. it drove find without the acd ecu. no lights were on, which i was surprised by. thought it would give me the 3 light error.

 

I need to point out that inverting the settings so that SNOW is the most aggressive is not possible. Currently it needs to be least aggressive, then GRAVEL in the mid, and TARMAC as the most aggressive. There was some confusion on the ease of flipping the maps.

Kyoo, You didnt have any ACD lights because there is no voltage going from the ECU back to the dash. The circuit is broken when the ECU is removed.

 

Aaron- Given that I am currently on street tires it sounds like the moderate tune would be best suited for me. When you tune these however do you typically set Snow to the stock tune or would snow be mild gravel moderate and tarmac as aggressive?

I would like to have the moderate as well as the aggressive setting for down the line when I switch to rcomps.

But then what setting would I use in the wet?

I really want to get this service done and wish I sent you my ecu a few weeks back. Im racing every weekend this month so unless I acquire a spare I will have to wait. But nonetheless Im still hung up on what would be the best config for my car.

 

Snow is Tarmac plus a little more for daily driving and really low traction usage

Gravel is the "wet mode" that we have devised or low traction because of high power in Brian's 2.3/7460 combo

Tarmac is the most aggressive and gives you the level that Dallas has seen in testing.

Main thing to remember about any of the ACD tuning and results I have gotten is there is no reason to go less than what we have developed. There will be other limiting factors to how your car responds, suspension set up, diff set up, etc. This wont make the car instantly oversteer and be unmanageable as Darrin found when he was testing it. He and 2 other AutoX champs from our area were amazed at the difference it made in how the car acted.

I have one guy that is on our Road Race side that still has a 4 disc rear diff and the car is very controllable. In fact he wants more lock We are going to adjust the diff first though before we crank it up.

The ACD tuning option is being re-uploaded to our storefront this morning.

 

Thanks for the prompt response. Sorry for all of the questions; Im not sure why I am having such a hard time grasping this concept

3 settings

Tarmac-Most aggressive (is this too much for a street tire'd car?)
Gravel- Wet map
Snow- New daily driving "go to map"

Maybe I am asking for too much here given all of my variables between wanting ability for more lockup in the future without compromising my rain/ snow settings?

This is still my dd that I autox on the weekend. The car is driven year round in New England so it sees snow from time to time.

My car isnt anything crazy power wise (BBK Full S2's e85 etc) ~460whp now.

Given my power level and 255 Zii's during a dry autox would the tarmac or gravel be the go to map? Now say its raining and I go to autox what would be the best setting in that case?

I keep confusing myself. In summary the stickier the tires the more aggressive you can go correct? And then on the flipside as traction decreases i.e rain, snow wouldnt you want it to be less aggressive? If thats the case then why is the gravel setting for wet conditions yet has more lockup than the snow setting?

 

We have all the rain here in the NW, I have never driven anything other than Tarmac. When I go to the mountain it stays in Tarmac. I put the car in a snow bank when it was 2 weeks old because I was uniformed about the function of Snow in a stock car. Snow stands for SUCK.

 

http://www.shopenglishracing.com/Eng...CD-Tuning.html

 

I never liked the snow setting either. However, I would use the gravel setting in the rain as well as the snow.

I'd like to make a generalization so please correct me if I am wrong here.

As traction increases so should the lockup, correct?

A couple variables to take into account regarding traction

-Terrain being driven on
-Tires
-Power car is making

Therefore if it goes from Snow-Tarmac, snow being the least aggressive then why in a high powered car, you mentioned Brian's with the stroker &HKS turbo would you use a more aggressive setting?

 

Brian's car wanted to snap oversteer because of how fast it came on, it actually needed dialed back down. Its very simple to know what to do actually, if the car understeers on "Snow" then go to gravel. It should feel neutral at that point to slight throttle oversteer. If you want more oversteer (and correspondingly less understeer on throttle) then go to Tarmac and it is more aggressive yet.

Think of it in part as an oversteer modifier button.

 

definitely on the list this winter. Glad there is continued support for us!

 

mine is in the mail, can't wait to test it out!!

 

Oversteer modifier button- I like that.

I guess you summed it up nicely with your last statement and as always I am completely overthinking this...

Now, who wants to lend me their spare ACD ECU?

Kicking myself for not sending mine in a few weeks back. Please return Sam's ECU to me please; he's too busy playing with his Mini anyway