BAWC Forums

[quote=""DCIV""]he was the first person making power from dr750 and i swear at the time people would have sucked his dick if it would have given them some of the power.


Coop[/quote]

If I recall he was still running just an SAFC with the stock 1G ECU at the time.

he ran arc2 and some how a safc I thought. Somehow the safc was just used for the maf calibration.


Coop

[quote=""Monochrome""]So my point about the MAF swap stands as it does nothing without the ECU which is the real upgrade.

Now that I think about it, if the MAF swap really did make a difference in Viras car, it's because you didn't change all the tables over and it just happened to be a better tune with the mix-matched MAF. Back then I recall all we did was change the MAF size and adder value when really it should have been the MAF adder and the whole scaling table. I remember figuring that out after selling my white 99.[/quote]

I think we are talking about the same thing. I had already installed a flashed ECU in my car by the time I swapped the EVO MAF over. As for maf size and adder I think I have my calibrations set based off of that. Should I change over and mess with the scaling table now?

[quote=""ChargerX3""]I think we are talking about the same thing. I had already installed a flashed ECU in my car by the time I swapped the EVO MAF over. As for maf size and adder I think I have my calibrations set based off of that. Should I change over and mess with the scaling table now? [/quote]

If it's tuned, it's tuned. There's 16 different things you can change between MAF pulses and injector pulses. Meaning there's 16 different ways to skin a cat all which leave you a skinned cat.

So Steve...are you interested in being the first person with a chipped V6 Max?

Hellz yea. You mean eprom, or Chrome?

EPROM for now. Chrome later.

Consider purchasing this. http://www.ebay.com/itm/262142447207?_t ... EBIDX%3AIT

It's the 91-92 SOHC Stealth ECU. It's similar, but not identical, to your Max ECU. There's a really good chance it'll run your truck as-is if you swap to an NA 3S MAF.

I just bought the EPROM version. Same part number, but with the EPROM socket populated.

So I'll dump the EPROM, and then we can discuss converting one of your ECUs over to a socketed and chipped version.

The other kick ass thing about EPROM tuning is that you can use an emulator and program/tune/test in real time. I've got a spare EPROM emulator that I can loan you if you want to give it a try. Not that you'll get much power out of it, but it could be good for tweaking drivability concerns.

So, it could be a fun little interlude before you go whole hog Chrome on an engine swap. Think it over.

thats pretty bad ass! DO IT!


Coop

BTW, this will work for Raiders too

[quote=""Jeff V.""]BTW, this will work for Raiders too [/quote]

Very cool, I just will not need it as I'm pretty much swapping engine and harness right away. So I would go with chromed right away. I still think a 3.8l mivec with its harness and Ecu would work. I am tempted to fab my own motor mount plate so I can sit the engine as high or low as I need and then only make one motor mount custom. The coolant stuff was the concern?


Coop

In order to use an engine plate, you'd have to fabricate new mounts on the chassis as well. Assuming there's even room to do so.

Just use a RWD block to start with and save yourself a lot of headaches.

I know your right. Your hardly wrong.

What about those 3.8l mivec's in the newer suv's.....would those be rwd?


Coop

[quote=""Jeff V.""]EPROM for now. Chrome later.

Consider purchasing this. http://www.ebay.com/itm/262142447207?_t ... EBIDX%3AIT

It's the 91-92 SOHC Stealth ECU. It's similar, but not identical, to your Max ECU. There's a really good chance it'll run your truck as-is if you swap to an NA 3S MAF.

I just bought the EPROM version. Same part number, but with the EPROM socket populated.

So I'll dump the EPROM, and then we can discuss converting one of your ECUs over to a socketed and chipped version.

The other kick ass thing about EPROM tuning is that you can use an emulator and program/tune/test in real time. I've got a spare EPROM emulator that I can loan you if you want to give it a try. Not that you'll get much power out of it, but it could be good for tweaking drivability concerns.

So, it could be a fun little interlude before you go whole hog Chrome on an engine swap. Think it over.[/quote]
Nice! Where in the hell did you find an EPROM version?

I scoured the pick and pull this evening and came across a 92 sohc stealth fed spec with the ecu you linked above so I grabbed it. Looks like the caps were replaced on this one too. Doesn't seem to have as much damage though.

Then I came across a 90 montero. Ecu was pulled but got the pigtails and almost got the trash can maf plug clipped off when it imploded. Was going to make a conversion harness for our maf with it, so I'm still short.

Finally tried my luck on a 93 montero rs. Had the same harness so I grabbed it. Md175915. Looks to be populated the same but with just a few tweaks. Even same board number.

Got home and plugged both ecu's right in. WoW! Talk about a performance upgrade. The stealth was the first an I immediately noticed throttle response. Wasnt planning much but it just seemed to run so much healtier. Took it around the block and left a one legged strip at the corner...in the rain. Felt good though and actually pulled to Redline hard for being a sohc. Huge difference. Then grabbed the montero ecu and it too ran great. Didn't seem quite as peppy as the stealth though but it too ran better than the MM unit.

All I need now is to install the newer maf and get this thing socketed. Would love to run that emulator too if available. Being able to live tune will be awesome. No more guess and check approach. Are there going to be any limitations to eprom like memory, added tables or circuits like mivec, knock sensor, and newer timing sensors? If it can do all that I might be convinced to keep it that way. If not I also picked up another 98 sohc 3000gt ecu. Thoughts?

Oh and the 90 montero has a V5MT1-1 in it still. So tempted to pull it in the rain.

Steve wrote:Nice! Where in the hell did you find an EPROM version?

Ebay

I'll know about stuff like the tables once I get the code dumped. It's basically the same as the 1G DSM code that's so well documented, so there shouldn't be many surprises. I disassembled part of the 94 SOHC code too, but got bored with it. It shouldn't be too hard to jump back into it.

I'm surprised the Stealth ECU ran so well with the trashcan MAF. That's pretty cool. You need to tell the guys on the MightyRam forum about your upgrade

Coop wrote:What about those 3.8l mivec's in the newer suv's.....would those be rwd?

The only US cars to get the 6G75 MIVEC were the Eclipse GT and Galant Ralliart. The 07 Pajero got it too, but that was never sold in the US. The Montero went out of production here in 06.

I guess it's technically possible to use the FWD 6G75 block in the truck, assuming the mount holes are there. Steve could maybe answer that question for us since he's got the truck and the Eclipse engine.

[quote=""Jeff V.""]Ebay

I'll know about stuff like the tables once I get the code dumped. It's basically the same as the 1G DSM code that's so well documented, so there shouldn't be many surprises. I disassembled part of the 94 SOHC code too, but got bored with it. It shouldn't be too hard to jump back into it.

I'm surprised the Stealth ECU ran so well with the trashcan MAF. That's pretty cool. You need to tell the guys on the MightyRam forum about your upgrade



The only US cars to get the 6G75 MIVEC were the Eclipse GT and Galant Ralliart. The 07 Pajero got it too, but that was never sold in the US. The Montero went out of production here in 06.

I guess it's technically possible to use the FWD 6G75 block in the truck, assuming the mount holes are there. Steve could maybe answer that question for us since he's got the truck and the Eclipse engine.[/quote]
Ha you always find d the good deals! I'll have to get caught up on the dsm code.

I'll tell the guys after I drive it for a bit. Should probably throw a wide band on it when I start tuning. I may very well be running rich right now and causing damage. Sucks not having a knock sensor either to even attempt to feel any pre detonation.

Engine mounts shouldn't be an issue as they are simple In design. Mugh simpler tHan the 3s. Ill check tomorrow but just re-welding one of the mounts to reach a few more inches up the block would be a cinch if needed. I plan to put my mivec in if the SR motor is repairable.

I have an extra SOHC ECU if you guys need it. My 94 is (was) Cali spec so it had the 4 o2 sensors, EGR, etc. I got a complete 95 harness and ECU to change it over to Fed spec so the Cali-spec ECU isn't needed any more.

I opened my ECU years ago after joining the forum to check the caps, just in case, but haven't since then, so I don't remember if there was any kind of EPROM in there.

I wouldn't be able to access it at this moment though, due to the nearing 2 feet of snow in my driveway.

No worries. I have a 94 SOHC EPROM ECU too. I used it for some scan tool stuff a while ago.

It was pretty cool. I was trying to find out what all the ECU model codes meant. So I installed my EPROM emulator and hooked up my factory scan tool. I'd read the model code (E09F = Fed DOHC turbo) change the type code on the emulated chip, and then read it again (E09A = Cal DOHC turbo). Once you know how the factory identifies the ECUs, you can build that logic into an aftermarket scan tool and have it automatically load up an MUT table specific to that car/ECU type.

I was able to go through all the model codes in a few minutes. You could do this with a flash ECU, but it'd have taken me 4x as long to shut down and reflash after each one. It's a really quick way to build and check custom MUT table entries as well.

I had started working on live tuning with my TechTom ECU, but that was a pain in the ass because it needed two emulators and the car couldn't properly power up both at once. So I had to power them both externally and I couldn't drive the car without having a my laptop fully charged and booted up.



I think I've got just about all the 'interesting' ECUs now.

91-92 SOHC EPROM
93 DOHC TT engineering prototype EPROM
93 JDM MINEs ECU
94-95 SOHC EPROM
94-95 DOHC TT TechTom EPROM
98-99 Flash

I still want to buy that 91 Engineering ECU that MadDog has

You have a LOT going on there. Lol

I'm interested to see where this goes. I remember reading awhile back where, I believe it was you Jeff, that posted about the SOHC ECU's being flashable for years.

If I can gain anything from this that would be awesome. If the EPROMS are just like the DSM ones then I have a local friend that could do some tuning for me.