home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 05-12-2017, 05:08 PM   #1
Brickinthewall
Newbie
 
Join Date: May 2017
Location: Sweden
Default Acceleration with Fuel enrichment in LH 2.4

During the years I have tried to chip my Volvo 940s but when I bought a BroadBandLambdaSensor I noticed the lack of fuel when putting the throttle down.

When I had an aftermarket system installed it was easy to just adjust fuel acceleration enrichment parameters for fuel enrichment.

But this time I want a reliable brick to go for long fishing or skiing trips and I dont want the M.O.T to hustle with me as with my last build, that didn't pass for several reasons.
So I have thoughts of LH 2.4 if there is possibilities to get a decent fuel enrichment active.

Back to the question
B204FT have fuel enrichment by EGT on analog input 28
B230FT have fuel enrichment to analog in 28 from EZ-K output 4

In some wiring diagrams for 940B230FK theres an extra cable to socket C55/pin3 connected to analog input 28.
In some forums they say that the hardware configuration on ECU 950(b204FT)equals to 962(B230FT)...

When I downloaed Tunerpro RT and some *.xdf:s I did see a file called something like fuel enrichment for the 962(B230FT) ECU. If that is configured in the hardware and the part activated in the software it would be nice ?

Have someone tried to use this for gaining more fuel during acceleration ?
Or is there other ways in LH 2.4 for fuel enrichment during acceleration like an aftermarket system uses the TPS.

Last edited by Brickinthewall; 05-12-2017 at 05:13 PM.. Reason: missed to mention that i have a 940
Brickinthewall is offline   Reply With Quote
Old 05-12-2017, 07:14 PM   #2
sbabbs
Board Member
 
sbabbs's Avatar
 
Join Date: Dec 2006
Location: Rushing Lane, Scappoose, OR
Default

Change the fuel enrichment map in the Bin of the ECU file your using. Add more fuel enrichment at certain loads.

I'd use the lh2.4 editor program to do it...
__________________
1988 245 White slicktop M47 Wagon! 2.5L NA 8v going in.
1990 745 B230FT Getrag JohnV flywheel 240mm clutch 13c A-cam 3.54 G80 548K MILES
1991 740SE B230FT NPR Strut braces IPD bar A cam 550cc EV14's. 3.73 G80 M90 to put in.
sbabbs is offline   Reply With Quote
Old 05-13-2017, 03:10 AM   #3
Brickinthewall
Newbie
 
Join Date: May 2017
Location: Sweden
Default

So it is possible to adjust the fuel enrichment on top of the main fuel map.
I believed or were told it was not possible and therefore you needed to get an aftermarket system and run that with a TPS(potentiometer).

So then I need to get me the Mostrich hardware and Tunerpro application.
For solving the issue that the car runs lean when flooring the pedal in the area of closed loop lambda regulation.

I thought I needed to modify the LH2.4 inputs with and arduino to get the functions of a aftermarket system.

But what is the system looking (inputs) at when adding acceleration fuel
Wich inputs does LH2.4 use or is there an advanced algoritm... ?

Now I am confused
Brickinthewall is offline   Reply With Quote
Old 05-13-2017, 03:20 AM   #4
JW240
All idiot, no savant
 
JW240's Avatar
 
Join Date: Aug 2004
Location: The Netherlands, Europe
Default

I remember when we tuned the acceleration enrichment via Ipdown's LH editor + Ostrich on a B204FT, the map he named acceleration enrichment had exactly this effect. Worked great, we could adjust from much too little enrichment to massive overfueling/bogging. Has been many years ago so I forgot the details. So not sure if that was with lambda flag on or off..
__________________
240 | 1991 | 330 KKm | B230F+T | Cossie T3 60/63 | M90 | TrueTrack
Husaberg FE450 '12 supermoto swapped



Quote:
Originally Posted by Redwood Chair View Post
Don't forget about properly seasoning it on HF jackstands for a couple years whilst dreaming about big powah 'goals'.
JW240 is offline   Reply With Quote
Old 05-14-2017, 03:14 AM   #5
Brickinthewall
Newbie
 
Join Date: May 2017
Location: Sweden
Default

Guys

Thank you very much for the replies now I will go on with buying Ostrich/Tunerpro....
I trust does LH2.4 boxes more than aftermarket setups to be more reliable. I dont want a stop thats unfixable when I in a nearby future take my car for a long fishingtrip in Lappland.
My car is going to run with 86mm crank ported 530, rebuilt 19T and the rest of the stuff...
Just a reliable car thats a little bit quicker...
Thank you very much this helped a lot

best regards
Brickinthewall is offline   Reply With Quote
Old 05-15-2017, 11:19 AM   #6
turbotankshane
Board Member
 
Join Date: Aug 2010
Default

There's no reason an aftermarket system can't be just as reliable as LH. I have a heavily modified and tuned LH setup in my 244, and MS on the b230ft in my truck. MS starts quicker and behaves better coming into and coming off of boost. LH closed loop seems to be more consistent. LH loves to backfire out the exhaust on tip-in after a hard pull and a long decel event, which is a lot of fun with unsuspecting passengers but overall a bit of a pita and a result of my vta bov.

As far as tuning your accel enrich, like JW240 was saying, the table labeled accel enrichment does exactly that. Dial a little more in at a time, as a little change makes a big difference there. It's also not a long-term enrichment event, more to compensate for a large, sudden increase in air mass. If you're lean across the board, modify your main map or injector constants to get general changes in fueling.

Last edited by turbotankshane; 05-16-2017 at 08:56 AM..
turbotankshane is offline   Reply With Quote
Old 06-14-2018, 12:51 PM   #7
lookforjoe
Board Member
 
lookforjoe's Avatar
 
Join Date: May 2008
Location: Rockland County, NY
Default NA acceleration enrichment

Thought I’d use an existing thread to explore this more - I’m using LH2.4 NA - so it “should” have a functional full load / wide open throttle enrichment, since the TPS includes a WOT signal unlike T system.

Verified TPS is providing signal to ECU

What I’m not seeing is a discernible enrichment response on my wideband meter.

Anyone familiar with NA mapping to guide me as to where to look?

I’m using a 951 LF 244 M230F bin
__________________

My XR July2013 - 446AWHP @ 8K rpm
lookforjoe is offline   Reply With Quote
Old 06-14-2018, 03:55 PM   #8
sbabbs
Board Member
 
sbabbs's Avatar
 
Join Date: Dec 2006
Location: Rushing Lane, Scappoose, OR
Default

On your NA lh2.4 when you go WOT it changes to a different fuel map. In the bin there is another fuel map, change that map. It might be the exact same as the main map is why you notice no change in fueling when you go WOT.

If you have an ostrich you can do the trace thing and see where the program goes when you click the WOT switch, then you know where the Wot map is in the bin.

Other option is look at the bin with say WinOLS program with 3d viewer and find the maps that way.

Or maybe someone else here knows where that WOT map is in the 951 bin.
sbabbs is offline   Reply With Quote
Old 06-14-2018, 04:27 PM   #9
sbabbs
Board Member
 
sbabbs's Avatar
 
Join Date: Dec 2006
Location: Rushing Lane, Scappoose, OR
Default

Using LH2.4 editor program says Wot map at 6531 and it's 1x17 map.

Also possible wot enrich map at 65C3 1x17

and another at 65E7 1x17

sbabbs is offline   Reply With Quote
Old 06-14-2018, 09:36 PM   #10
lookforjoe
Board Member
 
lookforjoe's Avatar
 
Join Date: May 2008
Location: Rockland County, NY
Default

Thanks for your research!

I do have an ostrich in my ECU.

I'll look at that & see if I can figure it out.
lookforjoe is offline   Reply With Quote
Old 06-15-2018, 10:19 AM   #11
shoestring
Board Member
 
shoestring's Avatar
 
Join Date: Jun 2009
Location: Beverly, 01915
Default

Quote:
Originally Posted by sbabbs View Post
On your NA lh2.4 when you go WOT it changes to a different fuel map. In the bin there is another fuel map, change that map. It might be the exact same as the main map is why you notice no change in fueling when you go WOT.
We've always had success changing the main 16x16 map for WOT fueling in our NA car, are you saying these 1x17s are for main fueling or fueling enrichment? Just started playing with turbo cars and was surprised to see there is no use of the WOT switch.

Trying to learn a little something here.
shoestring is offline   Reply With Quote
Old 06-15-2018, 11:00 AM   #12
lookforjoe
Board Member
 
lookforjoe's Avatar
 
Join Date: May 2008
Location: Rockland County, NY
Default

6531 is WOT enrichment. The other two are better defined in MrJaybreezes XDF for use with TunerPro: 65C3 is cold start enrichment and 65E7 is cranking enrichment. I would like to know what the values in the table represent, though. I know I can just raise them.

In LH 24 Editor it looks like this:



In Tunerpro (using v.26 XDF) it looks like this:

lookforjoe is offline   Reply With Quote
Old 06-15-2018, 02:37 PM   #13
sbabbs
Board Member
 
sbabbs's Avatar
 
Join Date: Dec 2006
Location: Rushing Lane, Scappoose, OR
Default

We'll when the WOT switch is enabled it adds more fuel that is defined by the WOT table there and the table has RPM references.
Says right there in the tunerpro RPM dependant.

What else do you need to know?
sbabbs is offline   Reply With Quote
Old 06-15-2018, 09:22 PM   #14
lookforjoe
Board Member
 
lookforjoe's Avatar
 
Join Date: May 2008
Location: Rockland County, NY
Default

Quote:
Originally Posted by sbabbs View Post
We'll when the WOT switch is enabled it adds more fuel that is defined by the WOT table there and the table has RPM references.
Says right there in the tunerpro RPM dependant.

What else do you need to know?
What the numbers represent. It’s the same with the upshift indicator, which I’d like to set @ 6k for each gear, but without some way to translate the cell values, I have no idea how to do it.

I raised the values in the RPM dependent adder, and now I’m getting WOT afr ‘s in the (@3.5-5.5k rpm) 13.3 range, much better than the 14 I was seeing. So, I’m happy with that, just have no idea what the numbers I added actually represent in any meaningful way.
lookforjoe is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 10:13 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.