White injectors
DW200 fuel pump w/ wiring kit
Wideband AFR setup
Contact Aaron @ Vast Tuning for your ECU

And Welcome !

www.volvospeed.com is your friend on this journey.
There is a lot of tuned Volvos and they will show you the right path.

There is a good mechanic in Croatia who knows these cars pretty good.
If i remember correctly his name is Nenad from Jaska,Croatia.
You might try to contact him on www.vkh.hr

The M56 is nicely complemented with a Quaife LSD. 350hp should not be a problem for a M56 with a R clutch. The one thing that is tricky though is the immobilizer for the 96 upward EU models (unless yours is an US import). The german speaking crowd usually reaches out to daniel2345 at volvopower.de f...

I never dug into standalone ECUs for my projects. I know people have been happy with Haltech and Megasquirt. But Volvospeed or Swedespeed are the better resources for these kinda projects than MVS.

One more thing: whites or blues are good for 300 hp at least, but with a goal of 350 you might wann a think about greens. Lspeed in Germany has them for a reasonable price. When buying colored injectors, make sure to buy with the parts number (fcp or ipd list them nicely) because there are similarly...

If you want to get lost in one of the craziest 850 builds.
google. THE PERIL - 1995 Volvo 854 T5-R

The work this gentleman did to a 850 is just amazing.

I think these numbers Volvo people talk about are usually whp because alot of the engines never leave the car and just receive bolt on parts and a tune to increase the performance.

Vast has a power goals page that can give you an idea of what kind of power to expect https://vasttuning.com/sample-setups/ Honestly if you're going for 300whp I wouldn't bother with a standalone ECU, the M4.4 will do just fine. I'd go with green injectors (as long as you're using gasoline and not E...

There are other clutch options with Sachs clutches that require modificatuons of the flywheel, I'll try to find the link I received a while back. Alot of these high torque setupts are said to be no fun for a daily driver. As far as I understand (and that's why I chose a R clutch) the R clutch is as ...