13 replies to this topic

[Simply Volvo]

Hello everybody! I have a few questions about my 1996 850 NA.

Currently i have the m4.4 na ecu. 0261 203 077 Has the big GW.2 on it. Ive been looking into seeing if it was possible to flash it and i believe it is possible with a VAG COM KKL Cable. I was just wondering if instead of using the m4.4 ecu i could swap in a m4.3 ecu from a 95 850 NA. 0 261 203 165 has a big H.2. It seems there is more support for m4.3 and it is easier to read the binary and flash.

Will there be any problems with this? Do the 95 NA's have EGR? Will i have to do the EGR mod on the 4.3 ecu? Also will i have any problems with SAS on my 96?

Also what problems will i have with my air condition. I remember reading a while ago the m4.3 air conidtion control and m4.4 ac control do not mix and match and you can potentially blow up your compressor? Im sure i can do some simple rewiring inside the ecu.

Thanks everyone!

[Simply Volvo]

Reading this... http://volvospeed.co...44-ecu-pinouts/

And this.

http://volvospeed.co...13#entry1705913

Looks pretty straight forward. Ill probably need to modify some wiring inside the ecu.

Does anyone in anyway think this is a bad idea?

Also i need to do reverse since im going from 4.4 to 4.3

[Jardim]

If the number on your M4.4 ECU is "0261 203 077" its not a M4.4 ECU

0261 203 077

That bold #3 i placed on the part number means that its M4.3

Had that 3 been a 4 it would mean its M4.4

Ask me how i know.

[Simply Volvo]

Jardim, on 24 May 2012 - 02:02 AM, said:

If the number on your M4.4 ECU is "0261 203 077" its not a M4.4 ECU

0261 203 077

That bold #3 i placed on the part number means that its M4.3

Had that 3 been a 4 it would mean its M4.4

Ask me how i know.

Hmm according to http://volvospeed.co...-850-70-series/

Its M4.4. I also tried hooking my vag com cable up to Motronic suite and couldnt get it to work with either 4.3 or 4.4. Then i tried using VolvoDiag my rkam and it would connect using m4.4 but then timeout after i connected and recieved the complement. Also vol fcr works occasionally with some timeouts so thats another indiication its m4.4. Im very confused with all of this cause many people are tellling me many different things. From what ive done its seems to be 4.4 but from what people tell me its 4.3.

http://translate.goo...1+204+294&hl=en

Another inidication of m 4.4

[Jardim]

wow. Guess that ealry M4.4 was 203 then, got this info off the streets so it was part true (person who told me had a T5 with 4.4 so his was 204)

-1 my post please

[Simply Volvo]

Jardim, on 24 May 2012 - 02:11 AM, said:

wow. Guess that ealry M4.4 was 203 then, got this info off the streets so it was part true (person who told me had a T5 with 4.4 so his was 204)

-1 my post please

I would -1 you, but this is a very misconception that the NA 203 ecu is m4.3 but its actually 4.4 so we all learned something here so i dont think its very fair to -1 someone about that.

Can anyone else chime in on problems with timeout on the m4.4 ecus? What FTDI drivers are people using?

Did some more reading and i believe i can use the 0261204224 or the 0261203165 ecu which both contain m4.3. I believe only the 0261204224 has full OBD2 support though according to the translated page.

Swap should be straight forward and i should be able to plug it in without any wiring mods if i dont touch my ac or climate control.

Ill probably bench test it first though so i can see if i can read and write the flash because thats the whole point of doing this.

I tihnk many people would benefit from being able to do some NA tuning at home. Maybe get a little more oophm by advancing the timing some and adding a little more fuel depending on if you have done any mods to open up the breathing. Also maybe increasing the rev limit by 500 or so RPM and then playing with the cam timing to open up even more power in the high rpms.

Hopefully lucky chimes in =)

[Jardim]

Yep learned something interesting here hehe

I never heard of problems with the M4.4, which is weird because everyone seems to be doing 4.3>4.4 conversions on their pre-97-98 T5s.

N/A tuning is a whole different animal, but if you add some bolt ons to a N/A plus a tune to optimize power up there in the higher Rpms she would definetly move.

Damn if you could work your head like TWR did with the 2.0 N/A whiteblocks for the BTCC you could see great gains at high Rpms.

[Simply Volvo]

Jardim, on 24 May 2012 - 02:28 AM, said:

Yep learned something interesting here hehe

I never heard of problems with the M4.4, which is weird because everyone seems to be doing 4.3>4.4 conversions on their pre-97-98 T5s.

N/A tuning is a whole different animal, but if you add some bolt ons to a N/A plus a tune to optimize power up there in the higher Rpms she would definetly move.

Damn if you could work your head like TWR did with the 2.0 N/A whiteblocks for the BTCC you could see great gains at high Rpms.

I have already done the 960 throttle plate, phenolic spacer and the airbox mod. I have other plans but would like to be able to get tuning working. Im not looking for a ton of power, but some fun. I wonder if the m4.4 NA ecus could be different hardware or software than the turbo ones. I dont think they are. Maybe i should try and contact lucky. Im sure he can help me with my Vag Com KKL cable and drivers.

heheh found htis posted by vagabond a while ago.

Cylinder Port and Polish + Over sized Valves + Stiffer Springs + Deck Mill + Higher Duration and Lift Cams + Adjustable Cam Gears + Turbo Injectors + Free Flowing Exhaust + Forged Rods and Pistons + Higher Rpm Limit + ECU Tune + Upgraded oil Pump + Large TB + Light Pulleys + Plus light Flywheel

[Jardim]

thats a 250+hp N/A setup right there. I would try to do ITBs just to be JDM about it


Lot of money into a N/A but if you paired that with a M66 and a close ratio final gear it would SCREWWWWWWW
W

[Simply Volvo]

Jardim, on 24 May 2012 - 03:02 AM, said:

thats a 250+hp N/A setup right there. I would try to do ITBs just to be JDM about it


Lot of money into a N/A but if you paired that with a M66 and a close ratio final gear it would SCREWWWWWWW
W

NA FTW! There has been so much NA talk lately and Na to turbo, etc it makes me very happy! Hopefully i can figure out tuning, because tuning is the first step!

Also with that setup i listed above, i would be comfortable running 8500RPM. =)))))))

Cams would be a lot though. I was considering buy an 850R with my 2500 budghet but maybe ill put some work into my NA. Not sure.

[Jardim]

If you have another car besides your N/A right now i wouldn't buy the 850R if you were serious about a N/A build

But if your N/A is your only car i would buy a good condition 850R or even a T5/Turbo for that matter.

[Simply Volvo]

Jardim, on 24 May 2012 - 05:09 AM, said:

If you have another car besides your N/A right now i wouldn't buy the 850R if you were serious about a N/A build

But if your N/A is your only car i would buy a good condition 850R or even a T5/Turbo for that matter.

Unfortunately i do not. I think it will be better to just get and R now and maybe do a NA build later down the road when my NA motor goes.

[Yea-but...]

I would just like to say, that when people come on here and ask questions, we all say do some research.

You do a lot of research!
Props to you for that, you'll go places. (and not explode your engine)

[Simply Volvo]

Yea-but..., on 25 May 2012 - 04:55 AM, said:

I would just like to say, that when people come on here and ask questions, we all say do some research.

You do a lot of research!
Props to you for that, you'll go places. (and not explode your engine)

Yes I have been trying to do as much research as possible on this topic because I am very interested in remapping my ecu. I might try using a different computer this weekend.