I've never heard of it being done. What would be the point?

I don't think anyone has done it in a 1g but there are 2g guys doing it. As mentioned, the tuning capabilities are more than worth it with the re-flashes available vs. the cost of a standalone.

That's awesome. I wonder what they do about the knock sensor? Just use an evo one?

^+1 That is pretty much what happens when I hit the upload button every time on Jackal/DS-Map.

I wonder if it is a 16 bit ecu? In any case, the hardware and software are much newer, that may make a difference. That, and can you just use the Evo re-flashing software on a 2g ecu? That would make a big difference.

Here's half of it:
ebay.

Quoting jepherz:

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I wonder if it is a 16 bit ecu? In any case, the hardware and software are much newer, that may make a difference. That, and can you just use the Evo re-flashing software on a 2g ecu? That would make a big difference.

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I don't know what difference the 16 bit would make, as I am not up to speed on that very much. I am just saying why can't programs be flashed onto the stock ECU?

I think the 2G-to-1G ECU swap may be even easier. Its already been done, years ago. The 98/99 Flash 2G ECU's should be pretty much plug-n-play, I just need to build a cable/adapter for it. You just need to swap to a 2G knock sensor, and possibly the coolant sensor.
Anyone want to be a guinea pig once I get it sorted out?

Quoting keydiver:

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I think the 2G-to-1G ECU swap may be even easier. Its already been done, years ago. The 98/99 Flash 2G ECU's should be pretty much plug-n-play, I just need to build a cable/adapter for it. You just need to swap to a 2G knock sensor, and possibly the coolant sensor.
Anyone want to be a guinea pig once I get it sorted out?

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so 98-99 ecu is reflashable too? If you make cables for it and are able to sell them, let me know, and if you decide to do the Evo ecu I'm down aswell.
-Shane

Uh, no. 1996 thru 1997 (and most 1995 FWD) were Non-EPROM ECU's with the ROM inside the CPU, where it is inaccessible. In 1998 they switched to a new CPU with internal flash memory. So, this only works for a 1998 or 1999 2G DSM ECU in a 1G/GVR-4.

Quoting keydiver:

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Anyone want to be a guinea pig once I get it sorted out?

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I'd be up for trying it out.

Evo 8-9 ecu's are right on par with standalone systems and can also be covrerted to sd to get rid of that pesky maf that becomes a restriction in the mid to upper 500whp area.

I have seen it done in the 1g but I honestly did not take a close look or ask questions since I do not have a dsm or gvr4 anymore but it seems there is no real restriction in the stock ecu as it has made well over 700whp and can run 1500 cc injectors etc..

Forget the harness, has anyone ever flashed a 98-99 ECU?

here's another link to one of the ECUFlash Guru's on evom that's done it. Lots of good info here.

click

Quoting keydiver:

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Probably the first GVR-4 Flash ECU:


I would prefer someone with either a 2G or 3G #482/EVO MAS, as I can put the exact compensation into the flash when I ship it.

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It looks like Tom & Jeff had a busy Christmas

Jeff, my car meets the Evo MAS requirements & the ecu can be tested in a controled environment with supporting data recorded.

That looks awesome. What is the white connector from, a 2g ecu?

Oh, I guess I probably have it backwards.

So, how much Jeff?

As long as people can keep supplying me with the pieces necessary for the harnesses they will probably be ~$100. Fortunately the 2G ECU harnesses work well for an EVO ECU also. The white connector is the connector block out of a scrap 1G ECU, so the 1G/GVR-4 harness will plug right into an EVO or 2G ECU.
Some of the EVO flashes do allow for map switching, but I'm not an expert on that. The 2G Flash ECU already has 2 sets of maps, and you can simply go in and change one bit to flip between maps. So, to change from racegas to pumpgas is just a simple bit change, and it changes both the openloop AFR and the high octane timing maps both.
The change to E85 would be just slightly more involved, you would not only need to change the map bit, but you would need to change the injector scaling. Say you have 950cc injectors @ 37psi. Instead of an injector scaling value of 862cc (the 2G ECU thinks you are at 43psi base fuel pressure) you would need to change the Injector Scaling to ~578cc when switching to E85. The EVO Injector Scaling is just slightly different, as they have their own wacky scaler values. In the DSM community we use a scaler value of 31050/Injector size = scaler value. The EVO guys have been using 29241/injector size = scaler, so their scaler values look funky. Their stock 560cc injectors come up as 513cc! Their deadtime/latency values I also think are incorrect, as they are using the old 1G scaling of 24X, and I have a guy feeling that it is actually 32X. The 2G is 15X.

I will pm you for specifics when ready. Thanks Jeff!

ECUFlash is free, sort of. Colby decided to start charging for it, so it is now bundled into the price of the Tactrix cables. Basically the new versions of ECUFlash only support the new versions of his cables. If you buy a secondhand older cable, from back before he started charging, you have to use an older version of ECUFlash.

Your ECU price is a little high. I haven't had to spend more than $150 for an ECU yet. Some guys have found them as cheap as $50-$100. You won't find a standalone for anywhere near $329 to $429.

I don't think its fair to include the MAS or MAP sensor either, not if you're comparing it to the price of just the DSMLink. You would need those same pieces if you were to buy a DSMLink, or a used AEM. Besides, most guys interested in this already have a 2G, 3G, EVO, MAS or MAFT setup.
You would need the same 2G/EVO knock sensor if you went AEM, but its a valid argument if you are comparing it to DSMLink.

The EVO ECU's appear to use a better grade cap, but the real issue with the 1G caps was a defective capacitor, not just normal wear and tear. But, I have seen a few 1995 EPROM ECU's with leaky caps, which makes me think that Mitsubishi made some of them back in early 1994 before they fixed the bad caps issue. I've never seen a 1996 or newer ECU with leaky caps.

My 04 evo ecu came in the mail yesterday. I plan on dropping in a set of 560's and an evo maf and driving it around basically on a stockish evo setup. I'll work on mods/tune after its up and driving.

My harness is almost finished but I had a question about the obd2 plug. I need 12v and I was wondering if you guys were just tapping into pin evo25/dsm107(12v switched power)? Also what did you use as the ground?

Would the "M" cable be a good choice for tactrix cable? I really don't want to spend the extra $100 for 2.0 if I can run an older version just fine.

I'm trying to get there.
Use pin #106 as GROUND for the OBDII connector.
As far as I know the cheaper version of the 1.3 programming cable *will* work, but you have to use an older version of ECUFlash, before Colby started putting the new serial numbers into the cables. I have version 1.32 I think. Anything up to 1.37 works, or something like that. I actually had a bunch of them, and just sold them off at $69 each. I should have kept one to test, or to sell with a complete package. For $35-$40 more you get the newer version that includes ECUFlash. You should really ask Hamish for the particulars, so I don't steer you wrong though.

Thanks for the info Jeff, it really helps. I think now all I need is the cable once I decide which one to get. I might still have a copy of openecu on my computer from back when I owned an evo.

would it be worth it to switch up to the evo8/98-99 ecu if I already have a chip from you that works? if so what would the beneift be and what would the total cost be? If you want a tester for a 89-90car I my be interested.

so whats going on with this? Sorry to bring up old thread again.

the reason i brought it up, is because keydiver was working on a harness or something back then, and idk if it was trialed in anyones car, if youve done it, what harness are you using? and hows it working out for you?

geez, uhm do you happen to have the diagram of which wire goes where? and pics of it installed? Does it fit into a factory galant casing?

Jeff did build a jumper harness which I was testing. Jeff has been really busy & hasn't had a chance to go over the harness. The problem I was having is the car wouldn't rev out cleanly. Jeff is very close to having it done but he's just been very busy. I was also having some issues with ECUFlash working properly on my laptop.