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Old 01-19-2010, 10:51 AM   #26
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Yeah, I'm currently using the 578 and a few weeks ago I tried the 950. That was crap

AFR's were +/- 10 on idle and low 14's on cruising (E85 and didn't bother to change resistor in AMM wire). Apart from these issues which we will resolve with some mapping, the car felt quicker, snappier..

In theory the 578 should run more rich since the doesn't have a catalytic converter, but I can't compare it now. 578 Runs just fine now

Edit: @ipdown, copied your post in the first post, thanks! We'll look into the 597 see what's that all about
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Old 01-22-2010, 08:06 AM   #27
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Here are the main 16x16 fuel tables for different B204 GT/FT revisions. What I understand from digging info about LH 2.4 is that the values in the tables are corrections - the ECU calculates needed fuel based on lambda/rpm/AMM signals and then looks into this table and adds or subtracts some fuel (injection time actually).

Bellow the buttons, in the dark-red bar is ECU revision and engine.
Button Hexadecimal/Decimal changes digit representation mode. In hexadecimal values are byte wide, unsigned only. In decimal values can be unsigned or signed, depends on the Signed/Unsigned button.






Last edited by ipdown; 01-22-2010 at 11:58 AM.. Reason: typo
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Old 07-09-2010, 02:12 PM   #28
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.

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Old 11-06-2010, 01:30 PM   #29
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Hi,

just for information, the 0280 000 950 is a LH 2.4.2 ECU. The B204FT was sold in Germany in the 960's up to 1994. I'm currently looking for a complete components set ECU/EZK/TCU for my B230FT to get down the consumption of my E85 engine, but this parts are really rare.

Regards, Dirk
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Old 11-06-2010, 01:50 PM   #30
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Quote:
Originally Posted by stoni View Post
Hi,

just for information, the 0280 000 950 is a LH 2.4.2 ECU. The B204FT was sold in Germany in the 960's up to 1994. I'm currently looking for a complete components set ECU/EZK/TCU for my B230FT to get down the consumption of my E85 engine, but this parts are really rare.

Regards, Dirk
Yes, I firstly thought it is 2.4.4 because of ascii string in it, but later read in some Volvo documents it is 2.4.2. I am sure hardware difference is small between late 2.4.2 and 2.4.4
Btw 0 280 000 932 ECU from '95 940 B200FT is the same PCB as 0 280 000 950, the only difference is that 932 have CA3272 power driver (on 950 there are unpopulated pads), probably for controlling e-fan and A/C, while this functionality in B204FT is in TCU unit.
Also 932 ECU with 950 firmware works perfectly.
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Old 11-08-2010, 09:24 PM   #31
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Whats the best hardware for the B204ft the 2.4.2 or 2.4.4?
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Old 11-13-2010, 12:55 AM   #32
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megasquirt3
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Old 11-13-2010, 06:00 AM   #33
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Quote:
Originally Posted by DNAsEqUeNcE View Post
megasquirt3
what does this have to do with this engine? Just because many people have ditched LH because they cant get it to work semi OK doesn't mean noone else can. Anyone remotely interested in getting somewhere with it would have followed the links to ecuproject that have been posted numerous times and would have seen what is possible with it if you have a little patience.

I am not saying MS is bad or anything, some people just don't need it for what they want
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Old 11-22-2010, 03:32 AM   #34
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Quote:
Originally Posted by TiagusClub View Post
Whats the best hardware for the B204ft the 2.4.2 or 2.4.4?
The latest B204FT ecu is LH 2.4.2. There is no 2.4.4 for this engine.
Altough I have seen two 2.4.4 ecus -932 and -962, their PCBs are absolutely the same,
only difference is lack of power driver for E-fan and A/C relay on B204FT, but that's because
Volvo decided to put this functionality in the TCU. The software structurally is
almost the same too. For long time I thought -950 is 2.4.4. The greenbook says it is 2.4.2.
Newer should be better, altough some maps from 597/578 looks more promising, but this is just software, it can be remapped.
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Old 11-22-2010, 12:39 PM   #35
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It may take you hours to download, but I found blarfs site, and it has parts of the b230/b200 greenbook There are 11 pages of 85. These sections are included:
20 General Engine
21 Engine and Engine Mounts
22 Lubricating System

There are some interesting anomalys like the clearance on the lower compression and oil scraper rings are closer on the b200.
example page:



https://blarf.homeip.net/greenbook/TP30871_1

There are quite a few manuals on here that are not on k-jet for the 7xx and 9xx crowd.

I am in the process of downloading all of them I am thinking of hosting them on a faster site, along with all the other pdfs i have collected. Anyone have a good free document hosting service? Im not a fan of scribd, I dont like the interface.
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Old 04-09-2011, 01:18 PM   #36
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What size injectors are in the b204ft ?
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Old 04-09-2011, 03:50 PM   #37
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Quote:
Originally Posted by Hagar17 View Post
What size injectors are in the b204ft ?
standard green 804
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Old 12-01-2011, 02:24 PM   #38
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so, after running 1200cc injectors in my b230+16v+t thing on lh 2.4 for a while now, and also dyno tuning with a 937 bin and lambda disabled,

I can say that megasquirt is still a better option. it might be slightly?(maybe) harder to tune, but i feel it's worth it.

You can still lean cruise, waste spark, and all that cool stuff, but I am about to megasquirt my car, and I would actually find it to be more reliable. even with lambda disabled, LH still does funky unexplainable things.

hope all's well.

B

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Old 09-05-2013, 01:34 PM   #39
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Does anyone have repair manual for the these engines...

I would need to get copy of the pages that contain information on the power of the engine...
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Old 09-06-2013, 03:59 AM   #40
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what do you need? a chart? pure max stats?...
(i don't have a manual, but i can scan my belgian conformity test where it states how much kw it makes)

why do you need it?
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Old 09-06-2013, 08:38 AM   #41
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I have to proof somehow that 200 hp engine has been mounted to volvo 740 chassy, so no need for charts.
Before I've used service manuals from volvo, but I haven't found manual that contains B204GT(or ft) egine.
But document you are referring would do just fine, language may be problem, but I think it can be solved.
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Old 09-07-2013, 06:16 PM   #42
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Cool Info is cool........
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Old 09-09-2013, 09:48 AM   #43
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Quote:
Originally Posted by Hempp2_ View Post
I have to proof somehow that 200 hp engine has been mounted to volvo 740 chassy, so no need for charts.
Before I've used service manuals from volvo, but I haven't found manual that contains B204GT(or ft) egine.
But document you are referring would do just fine, language may be problem, but I think it can be solved.
I can scan the volvo "flickhandsbok", whitch is the volvo's small mechanic handbook. There the b204 engins are shown with hp/kw. Will this be okay? Pm me if you want me to do this.
:-)
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Old 07-03-2015, 06:03 AM   #44
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Hi,
B204GT is too complicated engine to put in a 91' 240 wagon and tune up 280-300hp?
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Old 07-29-2020, 02:51 PM   #45
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I am pretty sure that someone is going to call me a Grave Digger soon, or the Post Necromancer, but a small update, or additional info:

-> 1992 960 with B204FT has a "597" ECU;

-> 578 is fully interchangeable with 597, I don't feel much of a difference. Maybe, MAYBE it accelerates a bit better, but that might just be a feeling or an effect of having some faulty data in the previous ECU's settings;

-> Four 804 injectors, coupled with a resistor pack;

-> The TCU is buried deep underneath the dashboard, on the right side of the steering column - to me it is only accessible if I bend my body like a limp banana...

Unfortunately my EBC is down for no apparent reason, so I am running on an MBC down. So any piece of information on the TCU would be highly appreciated, especially as ipdown's website is mostly down :(

Also: do I get it correctly, that the only difference in FT and GT on B204 is the presence of the catalyseur, and different ECU? Is the EZK the same, or not? Did I just upgrade my FT into GT by changing the ECU? ;)
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Old 07-29-2020, 05:32 PM   #46
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I have no idea about the 204GT/FT engines, but I like to go through part catalogues.

The 204GT indeed has no cat, while the 204FT does.
The GT has an additional silencer in place of the cat.
The EZK is the same part number for both GT and FT - p/n 3531520.

204GT:


204FT:


EZK part 13 on the list right at the bottom 3531520.
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Old 07-29-2020, 05:38 PM   #47
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Also, here are the numbers for the ECUs.
Unfortunately they do not specify the Bosch numbers for the 204 engines, no remark on the bottom.
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Old 07-29-2020, 06:35 PM   #48
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I believe the brown ECU is Bosch number -597 and the green is -950. According to the data I have they switched from 597 to 950 in 1993. Green could also be 578? I am not sure. But 578/597/950 should all be fine for B204FT/GT.
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Old 07-30-2020, 06:15 AM   #49
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Thank you all for a nice inflow of new data! 597 is indeed light brown, 578 is dark grey (spruce?). 950, from the photo retrieved over the internet, is white (with large AX marking). But the "gulgroen" one is for B234F, so I believe it is 571, which is Chernobyl Grass Green indeed. The only 950 is found is said to be dismantled from a V850... while easyecu places it in a 960 only. On the other hand, it fails to recognise 597 as a possible one for 960 or 780, so...

I presume that the lack of 950 in the V740 parts cat is because this computer was introduced after 740 was phased out (and is thus not listed as present in 740 by the easyecu), and that lines up with your data well

Nevertheless, the list would then go as:

571, or 3517608, light green, LH 2.4, B234F,
578, or 3517718, dark green, LH 2.4.1, B204GT; ---> goes nicely in GT and FT;
597, or 3531519, light brown, LH 2.4.1, B204FT early; ---> goes nicely in FT, however might be a bit worse than 578 :P;
950, or 5003871, plain white, LH 2.4.2, B204FT late. ---> presumed to be worse than 578 (or not?).


I am curious to check what would happen if I swap 597 for 532 or 562...
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Old 08-03-2020, 01:13 AM   #50
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I've heard the EGT sensors are known to fail on these engines, so be on the look out for that...
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