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 Post subject: mafless tune
Posted: Mon Jan 07, 2008 2:37 pm 
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hypotheticaly, if one was to remove the MAF and run an ecu with an internal MAP sensor, EMS for example in a piggyback fashion to control injector pulse and ignition timing only in a EB-ED 5L would this cause any issues with auto trans control?
does the auto rely on a load signal from the MAF to detirmine shift points firmness etc? or is it based on TPS-RPM-roadspeed?

any thoughts guys?

cheers, luke
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Posted: Mon Jan 07, 2008 3:21 pm 
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Hmm it would depend on what signals the ECU sends to the Auto computer if it doesnt have any input to it then i cant see it being an issue as the auto computer runs the box not the ecu.

 

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Posted: Mon Jan 07, 2008 4:10 pm 
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It causes no issues. This is the exact way my 8860 is hooked up to my 5.0. The V8 has a seperate TCM, and as long as it still sees TPS and road speed it still works fine.
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Posted: Mon Jan 07, 2008 4:49 pm 
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cheers, thats what i thought
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Posted: Fri Jan 11, 2008 10:39 pm 
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theres been a few BA XR8 ecu's on ebay for peanuts, seems the easiest way to me.
not to mention they can be flashed to suit the engines needs quite easily too

 

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Posted: Sat Jan 12, 2008 12:20 am 
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hows that easier?

u wil neva hav the adjustment of an aftermarket ecu
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Posted: Sat Jan 12, 2008 11:47 am 
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as brett said.. it doesnt matter.. as long as you leave your gearbox tps and roadspeed connected it all works fine.. (unplug the tps and see what happens.. i dare you :) )


mitch

 

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Posted: Sat Jan 12, 2008 1:42 pm 
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Thats just nasty Mitch
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Posted: Sat Jan 12, 2008 7:41 pm 
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3.9from hell wrote:
hows that easier?

u wil neva hav the adjustment of an aftermarket ecu


not trying to flame you or anything, but, in fact its a lot better to flash tune/edit a factory tune as there is so many more load points then most aftermarket ecu's. look at all the ls1's making big hp on the std ecu, not many out there who go to an aftermarket set up. same with the xr6t's, if you look at most aftermarket ones they have something like 3000 load points (ems 8860=3072) where a std ecu can have up to 12000 load points. they do this so they can get there std car to perform the same all the time, different altitudes, temp, etc... where most a/m are built to be tuned for wide open throttle performance. so unless your going top end motec type ecu's the factory ones can be tuned more finely for drivability, but who can afford that, lol.

but with that being said it would not be cost effective to put a ba ecu into an earlier model.

 

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Posted: Sat Jan 12, 2008 9:10 pm 
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as yobboford stated the factory ecu has so many map points, and to get an aftermarket unit that equivalent you would have to spend a packet
$200 for the ecu, and lets say $200 for the harness and $500 for the tuner.
And its LEGAL, last time I enquired it was illegal to have an adjustable ecu in NSW
just seems easier to me
cheers kenny

 

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Posted: Sun Jan 13, 2008 3:17 pm 
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ok i see your point regarding load points

but i dont think its as big an issue as u are making out, but thats just me

also an ecu change of any kind is ilegal in SA so that doesnt help at all

thirdly i like the flexibility of an aftermarket setup
ie user definable outputs etc that just arent available with factory ecus

and yeah i dont see it being cost efective at all

but cheers for the input
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Posted: Tue Jan 15, 2008 8:40 am 
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kenny wrote:
as yobboford stated the factory ecu has so many map points, and to get an aftermarket unit that equivalent you would have to spend a packet
$200 for the ecu, and lets say $200 for the harness and $500 for the tuner.
And its LEGAL, last time I enquired it was illegal to have an adjustable ecu in NSW
just seems easier to me
cheers kenny



there are alot of other things u need to take into consideration such as the fact that the 5.0L's run a distributor in the eb-d falcons,the immobiliser signal would be more than likely different and the boss motors run vct and cam angle sensors ect, also the input sensors such as comp temp sensors ect will have different resistances so they will need most likely need changing 2 and thats if they are the same plug and thread pitch and diameter. holden vs ford s**t aside ive done a efi304 conversion in my torana and i made the conversion harness and i had 2 do heaps of research with immobilisers ect as i used a vr engine and lume. i see the point ur making but i cant see it beeing easier.
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Posted: Tue Jan 15, 2008 9:07 am 
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kenny wrote:
as yobboford stated the factory ecu has so many map points, and to get an aftermarket unit that equivalent you would have to spend a packet
$200 for the ecu, and lets say $200 for the harness and $500 for the tuner.
And its LEGAL, last time I enquired it was illegal to have an adjustable ecu in NSW
just seems easier to me
cheers kenny


i dout a ba xr8 ecu will cost $400 with loom they dont run a dizzy so u hav 2 rig somethin up there!! and by the time u buy the flash tuner u mite aswell buy the ems!!

who cares about legal

if it were legal it wouldnt b worth doin!! legal is no fun!!!!!!!!

 

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Posted: Fri Jan 25, 2008 8:34 pm 
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didn't even think bout the cam sensors, but I believe that there are many different programs/configurations that can be flashed into the ecu, as I will be using a program based on the XR6T.
I could be wrong, but I'm sure that there would be a program similar to that of the AU 5 litre ,or even the 5.8/6.0 lightweight yankee V8 that is coming to Aust in the Orion?
Just food for thought? cheers kenny

 

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Posted: Sat Jan 26, 2008 12:55 am 
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totaly different settup dude,
imho more expensive and more difficult to sort out than an aftermarket ecu

btw ive yet to hear of anyone who has found a correctly set up ems to hav less tune stabillty than a factory ecu

the fact that the ems or most aftermaket ecus run wideband o2 sensors, respond vast amounts faster in closed loop mode, can be configured for much broader closed loop conditions and larger, more accurate correction percentages more than makes up for the reduced amount of load points

as far as im concerned case closed
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