Hi Stu,
If you had no lap top or digi adjuster the only thing you could do
would be the calibration drive which only allocates wheel positions, it
has no speed sensor setup function. You would have to use the generic dat
for all your driving. I think RL do not make this clear enough TBH. With
out either RL would only provide rudimentary TC. It must be set up for
individual cars and driver preferences.
The RL unit is only self learning in respect of the initial calibration
run. That only needs to be done once. Its function is to tell thesystem
which wheel is connected to which RL channel. Once calibrated correctly,
this never need be done again as the data is added to the stored dat
file, however it is a good idea to keep a copy dat off the car for
reference and back up.
Your friend is very lucky. The generic dat supplies by RL are only supposed to
be a startingpoint. With the correct wheel allocations andcylinder
configuration the generic dat will give some basic TC but not use the full
RLTC potential.
To get the full benefit of RLTC you must put in the exact tire sizes. The
unit works out rate of slip by using the ABS pulse count and the
circumference of each wheel. From this data it can calculate the rotation
speed of each wheel. The system is programmed via the dat to ignore speed
difference below a certain level to male the car drivable. Above a certain
user selected levels injector cut is progressively introduced to get the
slip level below the trigger point using the cut tables
This system was never designed to be just plug and play, some degree of
setup is required. Each set ofwheels requires its own dat. If you have the
digi adjuster you can change thesettings in the car each time wheels
are changed
This system was initially designed for professional use by race teams. It
was expected thatconsiderable time be spent monitoring and adjusting
settings to get the best possible TC for each circuit.
RL do do a very basic version with no setup facilities that gives basic TC
for cars without it.
I hope this helps
Phil
[Richard Batty]Sorryto butt in Mike... but I will answer a few questions for you as I have to set up my wheels sizes.
I am a little confused here. So if it isn’t important that the inputted wheel diameters mean anything, then why is this even an option?
[Richard Batty]Because people like me run different sized tyres front and back and you have to get the speeds to match up. If you run the same size front and back then its not an issue.
So what you are saying is that the RLTC ECU does all the work in determining tire sizes and wheel speeds? So if I slapped on some 40" tires, the ECU would know this and correct automatically?
[Richard Batty]Sort of, if they are the same size front and rear then the ECU will work fine, if you have different sizes you need to modify them so when doing the real time logging you can seeall 4 wheel sensors reading the same speed (which doesnt have to match your cars speed)
Sothen how can I guarantee your statement "The key is matching wheel speeds"
What can I doas a user of this system, make this happen then? If I never use the option of "config wheels" then I assume the
ECU does all the work anyways? right?
[Richard Batty]Just ensure the wheel speeds are matched using the real time logging.
So my high end mis-firing I had awhile back wasn’t related to putting different tires/rims on and not re-configuring the wheels? Hrmmm~!
I thought that the 50mm difference between actual vrs inputted size I had in the system was the cause.
[Richard Batty]If you only changed the front or only changed the rears then there could be a significant difference inthe speed readings given at higher speeds.... again use the real time logging and seeif you see the graphs split at higher speeds.
Hi Stu,
Im running FWD so my settings will be quite a bit different from what you will have but here goes...
1) using the logging work out if your sensors start working from the start if so under "Config" set the minimum working threshold to be 1kmph
2)Work out at what speed you no longer needed the TCL. I launch, obviously wheelspin, change to 2nd still wheelspin change to 3rd and with decent tyres and 350bhp + 100bhp nos in FWD it no longer spins.Top end of 2nd is 100kmph so on the first tab "Configuration" I set the maximum operating speed to be 100kmph. Im assuming at this stage that your wheelsizes are set correctly and its reading the correct speed in the datalogging.
3) I found the cut way too harsh, so I modified them to be 1 off 4 on, 1 off 3 on , 1 off 2 on
4) under the launch menu you have Wet and Dry settings, unless your mad (or sometimes visit elvington) you wont be dragging in thewet so concentrate on the dry. Dry applies to 5% 10% 15% (anything other than wet) on your adjuster...are you using the old black box adjuster or the new flashy drift adjuster thingy?Soft cut is what you want to launch at I launch about 4000rpm and have hard cut about 4500
That’s the easy bit...
Now lets assume you have your dial set to 10% slip which uses dry settings,this basically means your allowing the rear wheels to be 10% faster than the front (some slip is required).
On your "slip control" tab youhave slip levels, lets assume the defaults of 5% 10% 15%, they are your cut levels above the 10% already explained (from the dial).
On the Launch Tab your "Delay slip override" and "start delay" work as a pair so if "Delay slip override" is set to 10% and "start delay" is set to 2 seconds, for the first 2 seconds after launch it will add an extra 10% onto the wheel speed differences, with the above settings your now upto 25%,30%,35% for your 3 slip levels.
Nowon your main "Configuration" screen it says "Straight line override" (5% default) this figure is also added to the above values so now your 3 cut levels are 30% for level 1 35%for level 2 and 40% for level 3 (not 100% sure about this, this may not get added)
Now your "Slip override for slow speed getaway" and "Slow override speed threshold" also work as a pair wo whilst your speed is below the "Slow override speed threshold" it will add the "Slip override for slow speed getaway" onto you 3 slip levels so if they are set at 30mpkh and 15% whilst your going slower than 30kmph your 3 cut levels would be 45% 50% 55%
(god that confusing!)
so once you’ve launched and wheels spinlike a mad manonce they come below the "slip to reinstate traction control" value you have set it reverts back to the standard traction control options so ignores all the above and just uses your dial +"Straight line override" + the 3 settings on "slip control" tab to work out your slip levels
hope that helps
Richard Batty
1) So I can actually tell the RL unit to shut down after a certain speed--cool
1) yes
2) Now Iunderstand that the RL uses these %'s as the difference between reference and driven! I didn’t know that.
2) Enlightenment is a wonderful thing ;)
3) When you mention the 1off 4on, etc. Are you referring to the general sequential cut table for the whole system? Or are you referring to that being changed just for the "drag racing" Or can I use that just for dragging (drag.dat file), or do you actually use that for everything?
3)yes the cut table I have changed it for everything not just drag
4) When I have my setting at let’s say 15%, and I push the "Launch" button, does it use that # of 15% for the base reference?
4) yes I believe it does use the 15% as base if that is what your dial is set to. (WET is 0% slip, I normally run 10%)
5) If all I want to try initially is to use the "Launch" and no further intervention after lets say 15kmh, or whatever the launch speed turns off, what settings would I use? Would I just input something like 30-40-50kmh as the maximum operating speed and then it will shut down, or not apply any other default settings?
5) the max operating speed is for the whole unit not just the Launch control, to modify when you come out of "launch mode" and back into normal "Traction control" mode you modify the "slip to reinstate" (see answer 7)
6) In drag racing, wouldn’t it be better not using the delay and override? Wouldn’t that add to the "loss factor" of HP? I would think that I would just turn that off and deal with the main slip settings (5% 10%, etc)
6) Correct I have my "delay slip override" at 0%
7) and lastly,,, explain a bit more on your last paragraph. I am still digesting this part of the launch sequence. "slip to reinstate"
7) If you set "slip to reinstate" to 20% you launch and the difference is 40% as you gain traction that will come down,when that difference drops to 20% it reverts back to using normal TCL settings not launch.