Defeating the torque limit request on the Volvo 850 Turbo

Beefsquasher · Post by **Beefsquasher** » 21 Sep 2013, 21:53

So what I'm gathering from reading this thread is that cutting the wire does nothing, and you must apply somewhere around Ubat to keep the ecu from limiting torque?

Post by **matthew1** » 21 Sep 2013, 22:12

Beefsquasher wrote:So what I'm gathering from reading this thread is that cutting the wire does nothing,

True.

Beefsquasher wrote:and you must apply somewhere around Ubat to keep the ecu from limiting torque?

Don't know.

hanzbe420 · Post by **hanzbe420** » 23 Sep 2013, 17:15

you can grab stock ecu's at the junk yard easy... to test those. or just test yours if it blows up get 1 from a junk yard.

Reys · Post by **Reys** » 23 Sep 2013, 19:29

seems no1 wants to take the first swig, hanzbe420 what about you?

Beefsquasher · Post by **Beefsquasher** » 24 Sep 2013, 19:54

I will try it and report back this weekend.

Reys · Post by **Reys** » 25 Sep 2013, 18:42

respect

McBEAST · Post by **McBEAST** » 25 Oct 2013, 08:24

As long as I've owned my volvo I've kept looking into this thread for information, and everytime I do someone says they'll report in a timely manner.

I believe I've seen a successful implementation of this on another volvo community. Has anyone else seen one? I know Jimmy57 claims success but no one can replicate his results.

tightmopedman9 · Post by **tightmopedman9** » 01 Nov 2013, 23:34

Wow I'm surprised you guys are putting so much thought and effort into this whole thing, even cutting up your ECU harness! You can simply grab a M4.4 ECU (from a 97.5-98 S70, V70, C70 or 850) and program the boost limit and ignition retard by shift as you like.

Check out the thread I created on VS, 'Tuners Rejoice! Free Tuning For M4.4!'. The thread is pretty long but if you follow the Wikia link you should get a general idea of what is going on.

With just a simple VAG-COM cable, a M4.4 ECU and a 13.5V+ power supply you can modify any ECU parameter you'd ever want to, and more!

There is a 'Vehicle Speed threshold for boost reduction on gearbox signal' value that from the factory is set to 10km/hr. Set this to 0 and you'll be burning tires all day.

The other relevant map is 'timing retard on automatic transmission gear shift'. This is a map that specifies the amount of timing retard, at a given RPM, when shifting. You could reduce this map, but I would recommend being wary off too little ignition retard, it might shorted the life of your transmission.

hanzbe420 · Post by **hanzbe420** » 25 Nov 2013, 21:14

so whats up people any news lol haven't been able to go to the junk yard yet but i am going within a week.

Reys · Post by **Reys** » 22 Jun 2016, 19:37

Bump, Jimmy, Northern lights, Matt: would like to figure out if this mod is one worth trying, there has to be someone out there who has it currently running with this setup, if its possible