IAN

iTrader: (3)

Car 1988 Mazda RX7 Turbo

Trying to run traction control, flat shift and launch control. Read the manual once but rotary fumes for 20+years killed brain cells.

Question:
Is there a way to use launch control and flat shift if you have used all of the digital inputs (Including the logic digital inputs like input 11 etc. I am runing all logic for emissions up to 11 or 12. Can't remember how many they are off the top of my head at work )

Has anyone tried this? Was going to use my stock ABS sensors and wheels but cut out the sensor 15 years ago. So may go with Honeywell or Lugwig "red thing a ma jig" Cherry "red" Hall Effect Sensor But I'm wondering if the tooth spacing is too small or the sensor to long. Will measure if I ever have time to touch the rx7!

Purpose
-Traction control Just because I have the inputs sitting there.
-Flat shift might give me a .0001sec advantage on the track Hold BOOST.
-Launch control. Because rotarys suck at the drags. Need to beat my brothers MR2

MarkG

Hi Ian,

For Launch Control, as long as the ECU knows the vehicle speed then it should work. A digital input is optional so you can toggle it on/off without using WARI.

For Flat Shift, the ECU needs to see a digital input set as clutch, and a WOT signal (eg. 100% TPS). I do believe you have those.

I think the Honeywell or that Cherry Hall effect sensor might be to big for the tooth spacing of the factory ABS trigger. But I don't have an RX7 so let us know when you get to measure it.

Thanks.

IAN

iTrader: (3)

Thanks Mark,
When I was using haltech's I had a speed input so I have to find my old drawings to see how I had it hooked up without using an aux sensor. I have not idea why I can't remember. Rotary fumes or polishing aluminun kills brain cells I gather. Andy suggest that I need the aftermarket speed sensor.

You are correct about the ABS wheel on the FC being to tight of a gap. Looking at the specs for the honeywell I need a 10mm gap. THe stock wheel has about a 1mm gap. There must be a sensor available that can use the stock ABS wheel. I could not find the Cherry Hall spec sheet or company website. DIGI KEY has what looks like the Cherry Hall sensor cheap though.
I have been unlucky so far to find a spare set of stock ABS speed sensors. Should be able to connect the stock sensor to the speed inputs on the adaptronic.

IAN

iTrader: (3)

When I get home from work will see if I have a spare digital input. (Actually need two, speed (If I cannot use the SVSS and a clutch switch)
I used the the speed sensor signal which comes from the Green/red wire "1M" from the tacho which goes to the ABS and power steering. falling edge Pulse/km =2500.

MarkG

Just to add, ideally it would be best if the ECU can monitor the wheel speed of an undriven wheel (SVSS), so that the launch control continues to work while the driven wheel spins.

Basing on pictures, the Cherry and that Digikey sensor seems to be roughly the same size as the Honeywell, thus the same gap problem using the ABS trigger wheel. Another way of doing this is to aim the sensor so that it reads off the back of the wheel studs as Andy did in this video - But going this route doesn't seem to work well for traction control, so the factory ABS sensors might really be the best to use overall.

socks

iTrader: (9)

Mark, Can you give any advisement as to setting up flat shift if i have the digital inputs available?

MarkG

Hi Socks,

For the flat shift feature to work, you need three things:

1. A digital input set to "clutch" and is active.
2. "WOT" flag is enabled. (WOT state can be set in the TPS analogue calibrations tab)
3. RPM => the "Flat Shift RPM" in the power cut tab. Fuel/Ignition cut can be used.

You can also check the clutch and WOT flags (CLUT and WOT) in F11 to make sure they are active when you hit the flat shift RPM.

Thanks.

socks

iTrader: (9)

i must have an older version of wari. time to update!

all i have been able to find is the selection for Flat Shift cut ignition or cut fuel

socks

iTrader: (9)

nevermind. Its been set up properly. i'll have to dig into whether it was working or not.

does this interfere with the launch control?

MarkG

Hi socks,

If you email me your ECU file I can test it on the bench. As long as you have a proper vehicle speed input to the ECU, then launch control and flat shift should work correctly / separately.

Cheers.
Mark
tech@adaptronic.com.au
mark@adaptronic.com.au

socks

iTrader: (9)

Mark,

I believe I got it working! Thanks,

Sean

MarkG

Yey!

IAN

iTrader: (3)

Any progress on the abs sensor interface box from adaptronic. I just bought a set of abs sensors to replace the ones I cut and looking at getting the traction control set up.

MarkG

Hi Ian,

Yes we were able to successfully use the ABS wheel speed sensors for the 4 x VSS ECU inputs, while retaining the ABS system intact (i.e. no ABS light warning). However we found out that we needed to use tranformers to couple the ABS signal before it goes to the interface board, so the ABS system doesn't get upset. We haven't suggested this to people yet because the board + 4 x transformers installation may be a bit unwieldy.

However in your case, you can connect the wheel speed sensors directly to the ECU, since you don't need to worry about the ABS system anymore.

Thanks.

IAN

iTrader: (3)

Ok now that the car runs on the adaptronic and it is stored for the winter does anyone have any good ideas on where and how to connect to the stock 1988 Mazda wheel speed sensors. I have removed by ABS so it should be easy enough not to disturb anything.

Thanks,
Ian

MarkG

Hi Ian,

The wheel speed sensors has two wires - one needs to go to a VSS input on the ECU, and the other one to sensor ground (so you have 4 wires, from the 4 sensors, going to sensor ground).
The rear wheels would have to connect to MVSS1/2, and the front wheels to SVSS1/2.

The sensors have polarity so you need to connect them in the right way for the ECU to read the signal properly. Connecting the wires back to front won't cause any damage, and in fact will still work, but the ECU may miss reading the signal at times. Unfortunately I can't identify which is which on the factory diagram. And the only way I can identify is hooking up an oscilloscope.

But can you wait a bit longer before you do this? I'm set to do another S6 RX7 next week where we will use the wheel speed sensors directly (no ABS system). I'd just like to test this setup first, so I personally know it works flawlessly.

Thanks.

IAN

iTrader: (3)

I came across the same issue. Was not sure which was ground. I can wait. Its winter here. Not driving the car till end of march so will not be testing this till then.

Thanks,
Ian

MarkG

Thanks mate! At least have the wheel speed sensor wiring ready to the ECU.

Cheers.
Mark

Hybrid G

iTrader: (4)

I require clarification of wiring 2 step lauch control.

Can anyone confirmed if "speed sensor signal which comes from the Green/red wire "1M" from the tacho which goes to the ABS and power steering. falling edge Pulse/km =2500." works!!!

Assuming it does what speed sensor wire do I use left wheel or right wheel?

Assuming it does not, my front wheel sensor( no idea if it works no abs) has 2 wires..... any idea which wire I use?

Hybrid