Base Fuel Map - 4age 16v big port

[Ghetto-Spec .:bayka:.]

Hey ppl

I'm looking for a base fuel map for a 4age 16v big port bluetop.

Please can anyone point me in the right direction to the best way to get this? (screenshot or appropriate aftermarket ECU software to download)

I havn't had much luck on forums or google and the base fuel map given to me direct by haltech appears to be way way to lean. I have had to basically triple the injector pulse widths in the 0-2500rpm range just to get the damn thing to start and idle.

Running stock as rock 4age big port on Haltech E6A. Its idling at 1200rpm at about -40kpa MAP and 4ms injector pulse width. (Haltech base map value was less than half this figure!)

Help a brother out

[knightrous]

Will see if I can find my MegaSquirt maps for my 4AGE Bigport when I get home.
Standard generated megasquirt map started and idled quiet well, just needed tuned in the higher rpm.

Edit:

Found an old tune. Not sure how good it was, but it idled fine.
Fuel table

Injector / required fuel settings

[parrot]

Straight up, I know nothing about this subject. A few guys on aeu86.org have done a thread on megasquirts which also includes some basemaps.

Hopefully may be of use.

http://www.aeu86.org/viewtopic/ae86/...er=asc/start=0

[3jcelica]

Yeah,

Megasquirt stuff is going to be no good as it is all in Volumetric efficiency, the haltech you have needs injector open time which is more dependent on injector characteristics

Roger

[c2888]

If you tell people a little more about your setup you might get some more answers.

Stock injectors?
Batch Injection?
Sequential?

http://forums.haltech.com/viewtopic....=1615&start=45
Have a play with the spreadsheet mentioned in this thread if you can find it, will get you close enough to drive around. It roughed out a map for my 430cc into a 1600cc motor.

[Casey-G]

Need more info on your setup. stat.


If the map they gave you seems lean, perhaps it was originally made to run an engine on batch fire... if you have it wired as sequential it will definitely run lean..

^think that's right.



Maybe download a (or use above posts spreadsheet) injection time calculator n build your own basemap from scratch you wont get very far without a wideband o2 sensor though.



Base maps will vary from each individual engine configuration so dont expect to find a screenshot on the net that will just make you car run perfect or even "just okay" or at all in some cases.

[Ghetto-Spec .:bayka:.]

Thanks guys

My setup
-Fuel is mapped by injector open time (pulse width) using rpm and MAP as variables to lookup the values. This means i can't use the megasquirt maps unfortuantely.
-multipoint injection (all injectors fire at same time)
-stock injectors

Thanks yeh it looks like i might need to 'build' my own map. Will have a look for the spreadsheet.

I've got a haltech wideband o2 sensor so once i get a rough map in I'm gona try to tune this b*tch on the road.

[oldeskewltoy]

I've been "acquiring" 4AGE maps for a while.... http://s79.photobucket.com/albums/j1...nition%20maps/ no promises as to how good they are!

my smallport is currently running with this map

[Casey-G]

I've been "acquiring" 4AGE maps for a while.... http://s79.photobucket.com/albums/j1...nition%20maps/ no promises as to how good they are!

my smallport is currently running with this map

Is that motor boosted? Im still fairly new, but when compared to my map on my haltech, i have a - kpa side of the map and a + kpa side


to me yours just looks like its all + manifold pressure... Care to explain kind sir?

[oldeskewltoy]

Care to explain kind sir?

I'm an idiot... that isn't a fuel map... that is an ignition map.........

DOH!

The fuel map I'm running on is unique to my car because of my parameters.



I'm running 320cc low ohm injectors, sequentially timed to cams with 111 degree centers. The a/f targets I'm using are a bit rich right now(between 12 and 14), I'm still in break-in mode

I'm using a wideband and it is in self learning mode

[Casey-G]

Vol eff%

dont get that, i use inj time myself..


still, how are you able to control you -kpa manifold pressures?

[oldeskewltoy]

still, how are you able to control you -kpa manifold pressures?

???? huh? what control do I need??

[Casey-G]

Off-boost driving?

how do you control the fuel when the manifold is under vacuum?

it might just be the haltech having a different layout in the software perhaps, or im doing something wrong :0

[jondee86]

The fuel map posted by oldeskewl is for a N/A engine. It has load (MAP) on the vertical axis, and rpm
on the horizontal axis. The presentation is somewhat unusual, in as much as it appears to indicate fuel
in the form of plus or minus percentages from some flat across the board starting point. Perhaps easier
to visualise if you imagine a starting value of (say) 10 ms injection time in each cell.

Then the percentage can be read as 10-15%=8.5 ms, 10+27%=12.7 ms etc. I could be wrong about
the starting point values, as I never saw this way of graphing before. Anyways, there sure are a few
rogue values in there

Cheers... jondee86

[irishtwincam]

OST: Is it the fuel map a representation of the difference in VE vs factory fuel map?