CalvinSonniksen wrote: ↑Mon Mar 11, 2019 9:56 pm
Would you like to work on a “How to” for M4.4? There is already a pretty good step by step on the wiki to get started. But tuning requires understanding of underlying theories. Bumping power is easy enough, but even putting in a 19T turbo requires modifying the boost control PID (called LDR in M4.4) so the turbo does not boost spike and kill the engine, lowering the P- factor and the I-Factor helps significantly, the TCV pilot map must be changed as well. It’s a complicated process that is not easily taught.
On another note, M4.4 is direct drop-in, plug and play, with M4.3 Cars. Change 2 bytes of data to make it compatable with the 850 ECC and AC control. Hardware mods are no longer needed. As proof I offer my 854R making 300whp, a 855R at 350whp, and a s70 with 300whp, (and a smattering of sotickish 850s abs x70s) all of them tuned by me on M4.4, and a few of them built by me. The Auto and Manual setbit changes a bunch of underlying routines, there is a whole big chunk of code and maps dedicated to making manual cars smooth to drive and have smooth throttle on and throttle off transitions, that is not active when the Auto setbit is on. There is also boost by gear and boost limiting below a set speed, each of thoes are for their corisponding Auto/Manual versions. I understand M4.4 pretty well, and am trying to make it more accessible right now by simplifying the XDF file and make things like changing injectors or MAF sensors a single click affair.
The idea was more to take the audience here into account, and make it all a little easier, and a little better for those who aren't hardcore tuners, but just want to make minor changes, flash a quicker BIN, or do some mods while not going all out, as we do here. I don't think 350+ WHP is the main scene here, judging by the activity in this forum...
BUT, and this is a big BUT - 4.4 is NOT AT ALL a "direct drop-in", nor "plug and play" for M4.3 cars. AT ALL. There's no such thing as "changing one bit" (or two) and that will take care of it. Just doesn't work, and while the car might run fine and drive, you'll have CELs and lingering errors. The auto vs. manual is an example that I talked about already - scan the two for differences (607 vs 608, for example), and you'll see what I mean. The differences are really quite massive.
I've already also talked about load request maps and so on, and again, I don't think that stuff is the main audience here. My idea is to make this more accessible and easy to get started with, not overwhelm the "noob" (like me) with theory and programming speek, and clouding it all in vague ideas that only insiders understand, like the thread on VS does. It's VERY hard to get started, VERY easy to be overwhelmed and give up while looking at the Wiki and that thread, and you'll always be told off if you ask questions in there. Good luck getting replies on a new thread before it's old enough to be archived...
I really like your idea of automating a lot of the mods mapping. Clicking a button for a safe tune with the new injectors you've just put in, or the 16T, or just a little more oomph with the stock setup, is a stellar idea. Those who go hardcore will say you need to fine tune each vehicle, of course, but after all, they were all shipped with the same programming from Volvo, so as long as the parameters are safe, I don't see why it can't be done, by someone with the right skills. But to start out, good pics of a table top tuning setup and a clear how-to for getting started, along with some safe BINs (
both Euro and US - they're VERY different, again) would be a starting point that's just not there right now.
Also...
CalvinSonniksen wrote: ↑Mon Mar 11, 2019 9:56 pm
As proof I offer my 854R making 300whp, a 855R at 350whp, and a s70 with 300whp
Got dyno sheets to back that up...?
- S
'96 855 T5, R bumper and spoiler, Koni Yellows & blue H&R springs all 'round.