924Board.org

Horizonblue · Posted: Wed Dec 24, 2014 7:36 am Post subject: ECU placement

For those of you, who have Megasquirt, Haltech or whatever, where have you placed the ECU?

I'm looking for a good spot.
_________________
Euro 924, 1976

"If you can't fix it, don't break it"

/P.G. Andersen

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

On the optional factory storage tray under the glovebox.

Used Velcro to hold the ECU box in place and wiring terminals to connect the harnesses.

Serial cable is easy to reach since the laptop usually sits on the passenger seat or the center console.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

Raceboy · Joined: 01 Mar 2004 Posts: 2326 Location: Estonia, Europe

On the shelf under the glove box. I do not use serial connection for quite some time, I have blutetooth module in the ecu and do everything wirelessly.
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

leadfoot · Posted: Wed Dec 24, 2014 7:05 pm Post subject:

+1
Aluminium plate approx 250x200mm to house ecu and a couple of relays/fuses point the loom straight at the firewall
Stu
_________________
1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...

Horizonblue · Posted: Wed Dec 24, 2014 11:11 pm Post subject:

Now and then I consider a Microsquirt. That little thing can be placed almost anywhere.
_________________
Euro 924, 1976

"If you can't fix it, don't break it"

/P.G. Andersen

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

Micro squirt is a bit limiting in the options and mods, requiring external modules so you don't gain much.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

Horizonblue · Posted: Fri Dec 26, 2014 5:58 am Post subject:

Jah, but thinking about it, I only need 2 external modules. Map sensor and ignition module.

Remember that I have a straight six engine in the car.

My plan is to lock the original distributor, install a 36-1 trigger wheel at the cranck and run a single coil. The reason for this, is to have something to drive the converter box for the tachometer. As far as I know, it has to be taken from the negative side of the coil. I'm afraid that a "weak" signal from the ECU doesn't work.

I don't have any plans on running wasted spark.

Microsquirt has two injector outputs, so I will have to run 3 injectors per output. Should be ok.
_________________
Euro 924, 1976

"If you can't fix it, don't break it"

/P.G. Andersen

ThomasJoseph315 · Guest

Dunno about mega squirt, but I plan on placing my 6AL-2 programable where my evaporator is.

leadfoot · Posted: Fri Dec 26, 2014 11:35 am Post subject:

http://www.ebay.com/itm/HALTECH-F9-complete-with-harness-excellent-condition-/161532793411?pt=Motors_Car_Truck_Parts_Accessories&hash=item259c1ad243&vxp=mtr
http://www.ebay.com/itm/Adaptronic-E420C-Stand-Alone-engine-ECU-fuel-management-system-gas-spark-turbo-/121525700208?pt=Motors_Car_Truck_Parts_Accessories&hash=item1c4b7f0670&vxp=mtr
2nd hand standalone ecu's pop up on ebay all the time... wolf, motec etc

Stu
_________________
1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...

Raceboy · Joined: 01 Mar 2004 Posts: 2326 Location: Estonia, Europe

924 tach works with regular "weak" signal, no need for inductive pullup.
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

rhialto · Joined: 08 Jul 2004 Posts: 24 Location: Netherlands

I'm busy Megasquirting my 931. Does anyone of you have a more precise location (fotos perhaps) of how to get the loom from there to the engine compartment?

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

I ran mine through the stock firewall grommet on the driver's side.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

Horizonblue · Posted: Mon Dec 29, 2014 8:32 am Post subject:

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

The stock tach on my 79 works great with the tach output of the EDIS ignition module. I haven't tried driving it directly with the MegaSquirt yet.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

Raceboy · Joined: 01 Mar 2004 Posts: 2326 Location: Estonia, Europe

I used 76 tach (with 8k rpm dial and red sector at 6500 rpm) directly from VEMS 5v and 12v outputs and it worked perfectly.

Exactly the same tach like on this photo:

_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche