Evo8 ECU in a 1G DSM in the works!
Newbie
Joined: Sep 2009
Posts: 44
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From: A-TOWN!!
I neccessary wouldn't be doing this because it's cheaper, I would be doing something like this because it's cool and something that's innovative. I myself I wouldn't use DSMlink personally, I was either looking into something like this or DS-Map.
I've noticed that a lot of people are trying to save money by doing this swap over DSMLink. DSMLink is a mature product that will work 100% out of the box. The ecu swap is more of a hacker/tweeker project and is not mature. You may find yourself spending just as much as DSMLink in the first place if you don't have the experience to pull it off. Nobody is getting paid to do this and nobody is going to hold your hand to help you out. DSMLink will up and work, guaranteed. If you have install problems, tom and dave will be right on it helping to get you up and running as quickly as possible. DSMLink is a bargin.
I will help anyone who wants to do a writeup. Many people like Logic have already done a lot of good documentation. Once again, nobody is getting paid and a few of us have no problems diving in and doing this because we are comfortable with the wiring involved and the code changes needed in the ecu. I will provide input on a writeup, but I can't spend the time to do one myself.
Not trying to be mean, but trying to be direct so that people understand how to best get this done.
I will help anyone who wants to do a writeup. Many people like Logic have already done a lot of good documentation. Once again, nobody is getting paid and a few of us have no problems diving in and doing this because we are comfortable with the wiring involved and the code changes needed in the ecu. I will provide input on a writeup, but I can't spend the time to do one myself.
Not trying to be mean, but trying to be direct so that people understand how to best get this done.
Evolving Member
Joined: Sep 2003
Posts: 100
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From: Los Angeles, CA
http://www.dsmtuners.com/forums/tuni...-2g-works.html
Newbie
Joined: Sep 2005
Posts: 43
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From: Haverhill, MA
Newbie
Joined: Sep 2005
Posts: 43
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From: Haverhill, MA
I am using a DIS-2 ignition box and 90's need a special tach adapter to drive the stock tach with the DIS-2. I am going to attempt to drive the stock tach off this output without the MSD tach adapter.
Last edited by eyebrowski; Feb 5, 2010 at 02:50 PM.
Newbie
Joined: Sep 2005
Posts: 43
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From: Haverhill, MA
It was $169. The harness was a one off custom job made to a schematic I provided but anyone can have one made, Richard was great to work with.
I made some small changes to my Speed Density Harnesses. I send the DSM IAT to the Evo IAT (no the fuel temp sensor) and just change the IAT address to 0x03 in the SD code.
I send the DSM idle switch to the baro input. I think this is a 0-5 volt input (it shows up like that in the FSM). This way I can send a MAP input to this unused input (going to log oil pressure).
I send the DSM power steering switch (unused on my car) to the fuel temp input. This way I can log IAT's pre intercooler. You will notice the PS switch is close to the LICP on a FMIC setup.
When you get it up and running you will have to adjust your peripheries and possibly start applying patches to your rom to make the ecu happy. I had to apply the rear O2 heater patch etc. I have got it down to only throwing the P0622 (alternator FR) code. I have two things I am going to try next weekend that should fix it. One is a periphery change and the other is a wiring change.
If you get all the kinks worked out and it would be plug and play, I'd be interested and know many others that would too. I figure the cost of large production would bring individual price down.
Newbie
Joined: Feb 2010
Posts: 1
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From: Centreville, VA
0xDEAD, (and this goes out to all others as well)
You mentioned awhile back that you took pin 92 from the EVO ECU and connected this with pin 17 on the 1g DSM side as a "dirty" ground, and connected pin 40 from the EVO ECU with pin 17 on the 1g DSM side as a "clean" ground. I think this is just a typo, since you used pin 17 for both grounds, but what do you mean by "dirty" vs. "clean"? Are you referring to analog grounds vs. digital grounds or possibly signal vs chassis grounds? I just wanted to clear that up a bit just for completeness since pin 40 and pin 92 are both listed as Sensor Grounds, and based on the nature of the sensors that are listed for each pin, they seem to be equivalent. I have laid it out as 24 --> 40 and 17 --> 92 (1g DSM --> EVO) but my assumption is that the opposite would work just as well.
You also said you don't have any of the ISC wires hooked up between the EVO ECU and DSM harness. How does the car idle? Can the ISC be modified through changing the code stored in ROM such that hooking up the wires is not needed? I know people have eliminated the ISC on 1g DSM’s with mixed results, so I’m curious as to how this is working on your setup.
Finally, if making an OBDII to DB9 cable, what pin on the DB9 is the reflash cable coming from? I see it "stuffed" in the Tactrix 1.3M Logging Cable and the discussion on here has only been about the ECU side of this reflash connection.
Thank you in advance!
You mentioned awhile back that you took pin 92 from the EVO ECU and connected this with pin 17 on the 1g DSM side as a "dirty" ground, and connected pin 40 from the EVO ECU with pin 17 on the 1g DSM side as a "clean" ground. I think this is just a typo, since you used pin 17 for both grounds, but what do you mean by "dirty" vs. "clean"? Are you referring to analog grounds vs. digital grounds or possibly signal vs chassis grounds? I just wanted to clear that up a bit just for completeness since pin 40 and pin 92 are both listed as Sensor Grounds, and based on the nature of the sensors that are listed for each pin, they seem to be equivalent. I have laid it out as 24 --> 40 and 17 --> 92 (1g DSM --> EVO) but my assumption is that the opposite would work just as well.
You also said you don't have any of the ISC wires hooked up between the EVO ECU and DSM harness. How does the car idle? Can the ISC be modified through changing the code stored in ROM such that hooking up the wires is not needed? I know people have eliminated the ISC on 1g DSM’s with mixed results, so I’m curious as to how this is working on your setup.
Finally, if making an OBDII to DB9 cable, what pin on the DB9 is the reflash cable coming from? I see it "stuffed" in the Tactrix 1.3M Logging Cable and the discussion on here has only been about the ECU side of this reflash connection.
Thank you in advance!
My stock tach works with or without my CDI box, thats not the problem. I'd like the ecu to drive the tach if at all possible for other reasons.
Clean/dirty are my way of saying signal/chassis grounds. My prints show pins 91 and 81 as sensor ground, pins 13 and 26 as chassis ground on the evo ecu. On the DSM pins 17 and 24 are sensor ground where I am using pins 106 and 101 as my dirty ground. It was probably a typo. Also I originally thought I would need to tie the CAS ground to chassis and that is in my original hand sketched prints (with a dotted line) but you DO NOT do this. Any deviation would work but might reduce the accuracy of the sensors which becomes important for things like IAT and MAP if you are doing speed density.
The ecu has never thrown a code for dropping the ISC motor for me. The car idles well. Yes it will stall from time to time but for me, it is still worth it.
Do you mean what pin on the white flash cable?
The ecu has never thrown a code for dropping the ISC motor for me. The car idles well. Yes it will stall from time to time but for me, it is still worth it.
Do you mean what pin on the white flash cable?