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Old 01-20-2019, 03:45 PM   #1
955IsAlive
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Default Who Can Help me with a (Turbo) Tune for a B6304 on M4.4

Aside from the fact that this motor isn't ideal for boost... that's commonly known. I'm weighing up my options on working around stock ECU incl the ignition advance.

I know there's a handful of folks out there that know how to tune the M4.4 in six cylinder trim*....

Who are they?

* You can't use TunerPro with the six cylinder model.
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Old 01-20-2019, 04:10 PM   #2
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If someone modified a 5cyl M4.4 XDF file, they could easily use tunerpro to tune it.
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Old 01-20-2019, 04:43 PM   #3
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Originally Posted by Broke4speed View Post
If someone modified a 5cyl M4.4 XDF file, they could easily use tunerpro to tune it.
I believe a couple have figured that out, but they are (understandably) keeping that close to themselves.

I'm also looking for possible other "tunable stock" six cylinder ECUs that work with COP ignition. It's not worth putting MS on this.
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Old 01-20-2019, 04:57 PM   #4
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http://vasttuning.com/contact/
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Old 01-20-2019, 05:37 PM   #5
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Thanks. From what I understand, they work on the 5cylinder only :(
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Old 01-20-2019, 10:43 PM   #6
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Originally Posted by 955IsAlive View Post
Thanks. From what I understand, they work on the 5cylinder only :(
Aaron is good people. He might know who can help.
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Old 01-21-2019, 04:38 AM   #7
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It's not worth putting MS on this.
Why?
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Old 01-21-2019, 12:58 PM   #8
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Originally Posted by 955IsAlive View Post
Aside from the fact that this motor isn't ideal for boost... that's commonly known. I'm weighing up my options on working around stock ECU incl the ignition advance.

I know there's a handful of folks out there that know how to tune the M4.4 in six cylinder trim*....

Who are they?

* You can't use TunerPro with the six cylinder model.
Its worth popping the head off and shimming the cylinders if you are gonna boost it.
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Old 01-21-2019, 01:20 PM   #9
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There's another lengthy thread or 2 on here already about tuning the M4.4 six cylinder.

It boils down to, yes it's possible. It's been figured out and done, by at least one person in Sweden. Maybe others as well, but due to the amount of dev work they have personally invested in the software coding to make it happen, they do not give out this info for free, or even money. They will tune your motor for you, but if you are not in the EU, then it's a mail order tune, and custom on top of that. Plus the price they charge, you could buy an MS3X for that money and have infinite tuning options.

If you are a software engineer, you could figure it out yourself. I looked into it with a friend of mine who is a software engineer and codes for a living. He said I'd be better off just getting a standalone ECU. For what that's worth.

It's been said and done by a member, to just run the stock management with mild boost, turn up the fuel pressure a bit, change to larger injectors, and it's fine. I plan to try that as I rewiring the underhood of my 85 with the S90 harness, due to terminal harness rot. We'll see.
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Old 01-21-2019, 01:34 PM   #10
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Honestly, I have everything required to make an XDF for the M4.4 B6304 but time. I'm more than willing to give it away for free, but it would take weeks to transcribe all the maps over to tunerpro :(. A member here (and on Volvospeed) once created a spreadsheet showing the maps for a 5-cyl non-turbo V70 and their equivalent hex addresses in the B6304 file, so the information is all there. They're pulled directly from the WinOLS damos file too, so they're very accurate...and in german :(.

The M4.4 tuning thread on Volvospeed is a 475 page gem of info on tuning those ecus, so maybe some insight could be found there.
http://volvospeed.com/vs_forum/topic...uning-for-m44/
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Old 01-21-2019, 01:44 PM   #11
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If you wouldn't mind sending everything you have, I'll take a run at it again as it would save me alot of time, wiring, and money over converting to Megasquirt, AFTER I convert it to M4.4, haha.

I don't really know what goes into creating an XDF. But I have used Tunerpro before when I had a TPI v8 in my C10.
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Old 01-21-2019, 01:55 PM   #12
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Oh I have that file! Forgot about that. Yea guess I'll have to spend time with google translate before I can even tackle coding work. Unless one of our German members would like to help?
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Old 01-21-2019, 01:57 PM   #13
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Here is the spreadsheet showing the two files and the addresses for each map. This is really all I have, outside of the stuff available in the M4.4 thread on Volvospeed. An ambitious person could easily take an existing 5-cyl XDF file and re-address the maps for the B6304... ;).

http://volvospeed.com/vs_forum/files...998_3l_s90zip/
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Old 01-21-2019, 02:19 PM   #14
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Thats what I was thinking. I almost have the file completely (google) translated. I'll have to wait until I get home to play with making an XDF. Should be easy using the existing 5 banger XDF as a guide for what I need. Alot of these translations make no sense. Between the internet translator and not knowing the inner workings of a Bosch ECU, alot of this makes no sense.

Last edited by 240wagonguy; 01-21-2019 at 04:14 PM..
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Old 01-21-2019, 03:41 PM   #15
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Yeah, any sense I've tried to make of it hasn't really...uh...made sense? lol.
The M4.4 thread on Volvospeed is a gold mine of how to tune it though. As is the M4.4 tuning PDF, although it's kinda basic.
https://ozvolvo.org/uploads/editor/mr/e73vxmjdr7ev.pdf
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Old 01-21-2019, 06:15 PM   #16
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Quote:
Originally Posted by 240wagonguy View Post
There's another lengthy thread or 2 on here already about tuning the M4.4 six cylinder.
I swear I've searched for this particular scenario and not found much to sink my teeth into. Used google to search the site too.

Quote:
Originally Posted by 240wagonguy
It's been said and done by a member, to just run the stock management with mild boost, turn up the fuel pressure a bit, change to larger injectors, and it's fine.
That's kinda where I'm at. Larger injectors and perhaps a MAF/larger housing to match. Rising rate FPR if needed to turn down the flow at idle/up for boost. Run a blend of gas and E85 to have a bit of overhead for the high compression and aggressive advance of the stock ignition. (cheapish) Electronic boost controller and of course AFR gauge.

Thinking about idle and bigger injectors.. based around the 25% trim limit in the 4.4. If you're keeping stock FP at idle, your injector choice would need to be below 266cc/min which is not really much above the stock 208 if you're looking to make power.

A combo that looks good is 329cc (T6) injectors at 25 PSI at idle (I'm estimating that based on 25PSI flow of 263cc/min at 80% DC). They should flow 363cc/min at 50PSI (again 80% DC). Rising rate for that was 2.5, putting it at 58psi at the rail... 50 at the injectors with 8psi of boost. A larger MAF housing might put things in adaptation range for idle, I won't know until I start testing.

I understand there's limited validity to these calcs because reality is dynamic. Without testing anything "in the wild" yet it's hard to say what the best combo will be... But that's my best guess.

The other thing I noticed is that according to VIDA, the stock fuel pump is only good
for 80l/hr at 43PSI. So if that's right, I'll have to get that swapped out before long, especially if there's ethanol added into the mix.

In my case, I'm not looking for massive gains, they won't happen with 10.7.1 anyway. But if I can make it a bit of a stump puller/lugger with a flat torque curve, that would make me happy.
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Old 01-21-2019, 06:19 PM   #17
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Its worth popping the head off and shimming the cylinders if you are gonna boost it.
I think you mean a spacer? It's 10.7:1 ratio.
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Old 01-21-2019, 06:25 PM   #18
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I'd love to play with and learn tunerpro. Maybe that's something for a stage 2.
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Old 01-21-2019, 07:14 PM   #19
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I think you mean a spacer? It's 10.7:1 ratio.
No he means shim. It's an open deck block that the liners are known to have issues on.
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Old 01-21-2019, 08:26 PM   #20
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No he means shim. It's an open deck block that the liners are known to have issues on.
Ah. Sounds too sensible for me, not nearly TB enough.

I'm really not looking for big gains, just wake up the sloth some. If I can get it even to 250/280HP ish with a reasonably flat torque curve I'll be happy. NA would probably get me close in peak power, but I like response down low. We'll see if the liners can take it :D
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Old 01-23-2019, 05:34 PM   #21
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If I can get it even to 250/280HP ish with a reasonably flat torque curve I'll be happy. NA would probably get me close in peak power, but I like response down low. We'll see if the liners can take it :D
Won't be a problem with that power level. You can shim it when and if you have to change the headgasket, if it hasn't already been replaced. Old original ones tend to leak oil from the right rear corner.
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Old 01-24-2019, 08:45 PM   #22
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Won't be a problem with that power level. You can shim it when and if you have to change the headgasket, if it hasn't already been replaced. Old original ones tend to leak oil from the right rear corner.
Thanks Lankku, I remember your name coming up before for tuning these i6's.

Do you know much about these BMW turbo manifolds being (supposedly) used on the B6304? I know the stud holes can be made work, but it looks like there might not be enough clearance between the actual turbo and the head.

I'm looking at a small turbo .63 A/R
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Old 01-26-2019, 03:23 PM   #23
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I've either made my own or used B6284T manifolds as a base. Haven't used or seen BMW manifolds but that sounds about right.

You don't need alot of space between the turbo and head, nothing has melted with less than an inch. But if you are worried then install a heatshield or a blanket on the exhaust housing.
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Old 01-28-2019, 12:37 PM   #24
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check out Brandtab on intagram or facebook. that dude tuned a b6304 with a turbo to over 500whp , so they sure love boost, would think its on e85 tho and a aftermarket ecu. hes a madman, shims between the cylinders. he did the same on a b5234t and had over 400whp and beat the **** out of it in his drift pv
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Old 01-28-2019, 04:43 PM   #25
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check out Brandtab on intagram or facebook. that dude tuned a b6304 with a turbo to over 500whp , so they sure love boost, would think its on e85 tho and a aftermarket ecu. hes a madman, shims between the cylinders. he did the same on a b5234t and had over 400whp and beat the **** out of it in his drift pv
Cheers will do.
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