thinking about motec for my daily drivin/sfwd crx that iam in the process of building. wanted to know if people daily drive on motec or should i look at the aem ams.

 

I own both and either can be daily driven

 

did you get your motec to work with your guage cluster?

 

i cant comment on the motec but we have done at least 10 cars with the aem ems in the last few months... they are all daily drivers.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2FastxEg &raquo;</TD></TR><TR><TD CLASS="quote">did you get your motec to work with your guage cluster?</TD></TR></TABLE>

No. The motec is just for engine mgt. You still retain the oem ecu and cluster works fine.

 

Why would you retain your OEM ecu? Or did I read that wrong? Why have a standalone be a piggy back? Maybe I misunderstood you.

art

 

You can keep the oem ecu in the car to run the speedometer, and engine temp, and you can wire up a tach signal to keep the factory tach working. I've done a few hondas that are daily driven with motec and everything still works.

 

&lt;&lt;&lt;&lt;&lt;&lt;-- Daily Driven Motec... Not a honda though..

 

thats retarded.... spend mega B$ing on a motec just to have to hack in the factory ecu to keep the guage clutster...

hell even on the s2000 where some of the guages are driven by the ecu they all still work with the ems....

 

The AEM is a replacement ecu, the motec is not. The motec is an engine mgt system and thats it. Motec systems are designed for racing not really for street driving. To run street class you must retain the cluster. Both of mine work pretty great.

 

You dont need to keep the Stock ECU in. The only thing on the cluster is the Tach, Speedo, Engine Temp and fuel level.

All those above are independant of the OEM ecu. For the tach wire up the MSD tach output to it. The Speedo is also independant of the OEM ECU so the VSS signal will go to the cluster. Engine Temp, noting needed there since the sender is on the head. Fuel level, the fuel sending unit is also independent of the OEM ECU.

So in other words you dont need the OEM ECU to make things work. At least I dont do it like that.

art

 

Fwiw, i ran the DFI 6.0 withOUT the stock ecu, but i still did retain a stock harness (integrated into the dfi harness) and the speedo and everything worked fine, even tho there was no ECU..

 

I assumed the stock ecu was what was giving the speed sensor it's voltage input. If you hardwire the sensors to their respective inputs then you could do away with the ecu. I just stuck a stock civic dx ecu in my integra.

 

Does the speedo itself interpret the squarewave ppm signal or it that handled thru the ecu?


Modified by 30psiCiv at 6:57 PM 2/15/2004

 

I would imagine the sensor does it, because my speedo worked fine, and i ran no ecu

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">I assumed the stock ecu was what was giving the speed sensor it's voltage input. If you hardwire the sensors to their respective inputs then you could do away with the ecu. I just stuck a stock civic dx ecu in my integra. </TD></TR></TABLE>

So in order to remove the ecu entirely you would have to hardwire the sensors? Therefore they are controlled thru the ecu now?

 

I think what he is tryin to say is the the speedo signal and tach signal goto the ecu for input and the output from the ecu which has not been changed goes to the gauge cluster. So therefore the ecu is just monitoring the inputs and doesnt change them. The speedo is calibrated for the VSS. This is why I had to do nothing when switching from my USDM speedo to a JDM speedo which only reads in KPH.

 

So the ecu has only passive control of these sensors?

 

Yea pretty much. Passive works. Sometimes you just cant think of the words.


Ohh what So Co can do to one the next day. HaHa

 

yeah, the ecu has nuthing to do with the speedo.. they recieve the same signal.

as far as i know only the later 6th gen accords and s2k's have ecu controled guages. (temp guage, etc...)

 

What are the 3 wires that go to the VSS? I know the signal is the same, but is there not a power in and ground that come from the ecu?

 

The three wires on the speed sensor are 12-volt power source (yellow), ground (black), and 5-volt signal wire (orange).The ECM, speedometer head and cruise control unit all send out a 5-volt reference signal to the speed sensor. The speed sensor takes the voltage on and off to ground, making a square-wave pattern. The faster the speed, the faster the square-wave pattern.

 

Correct. The VSS gets the 12v from the battery. The other wire that goes to the ecu is just signal input that also goes to your tach and crusie control unit. Take the ECU out, it adds weight.

art

 

With my speedpro, i took out my old ecu. i did alot of asking here in H-T (alot of yall should remember me bothering yall ). I got all the info's i needed and made my own accessory harness, everything worked on my gauge cluster and also had A/C. With the A/C, it was a little tricky because the stock ecu controls the compressor clutch on and off, if u wire it to be "on" all the time, your compressor clutch will burn out. what i did was hack the compressor clutch to turn on and off with the condensor fan, it worked very good.

With the speedometer, the blue/white wire traces back to the ecu, then goes to the cluster. what i did was just ran it from the speedometer sensor and straight to the back of the gauge cluster and grounded the black wire on the speedometer sensor.

Here's my custom accessory harness that went along with my Speedpro (96-00 Civic)...








Modified by TurboDANDEE at 3:28 AM 2/16/2004

 

nice work dandee.