FAO Electrics types- Switching ALS on/off + Valve activation
23-12-2004, 05:37 PM
#1
DEYTUKURJERBS
Thread Starter
FAO Electrics types- Switching ALS on/off + Valve activation
Righty...
On Cossie P8 ALS is switchable by fitting an inline switch in an earth from pin, ummm, 19 or whatever, and activation/deactivation is by throttle angle picked up by the TPS.
But what about if the managment is a bit more basic, with no on/off (i think
) switch? Can you make it switchable with some minor mods?
If the ALS is activated/deactivated by whatever switch specified, a seperate throttle switch id have thought be best, but if you fitted an inline switch to that itd not work as itd show only as OFF then, and as to turn the antilag OFF itd have to show as ON, wouldnt it?
You couldnt just run it off the TPS and have it switchable at all i wouldnt think?
A clutch switch would work in the on/off switch way, but only ALS with the clutch down is a bit wank really
I have feck all electronics knowlege really so if im being a thicko and missing the obvious, sorry!
Hows the ALS valve itself activated also? I presume thats just somthing youd know by asking the manufacturer, ie if it just replaces the ISCV or if its activated off a seperate pin off the ECU or something (please explain the "something" if you can as i havent got a fucking clue 
).
On Cossie P8 ALS is switchable by fitting an inline switch in an earth from pin, ummm, 19 or whatever, and activation/deactivation is by throttle angle picked up by the TPS.
But what about if the managment is a bit more basic, with no on/off (i think
) switch? Can you make it switchable with some minor mods?If the ALS is activated/deactivated by whatever switch specified, a seperate throttle switch id have thought be best, but if you fitted an inline switch to that itd not work as itd show only as OFF then, and as to turn the antilag OFF itd have to show as ON, wouldnt it?
You couldnt just run it off the TPS and have it switchable at all i wouldnt think?
A clutch switch would work in the on/off switch way, but only ALS with the clutch down is a bit wank really
I have feck all electronics knowlege really so if im being a thicko and missing the obvious, sorry!
Hows the ALS valve itself activated also? I presume thats just somthing youd know by asking the manufacturer, ie if it just replaces the ISCV or if its activated off a seperate pin off the ECU or something (please explain the "something" if you can as i havent got a fucking clue
).
23-12-2004, 05:49 PM
#3
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To do ALS, requires FULL ecu mapping and intervention including
seperate maps for ignition and fuel during ALS run time.
You cannot just add a few mods/bits and expect it to work !
The ALS valve should be activated/controlled by the ecu to regulate the air flow during ALS periods.
This is usually controlled by the ECU using pulse width modulation at high frequency to
control the valve position the same way an idle speed valve is controlled.
Some ALS valve installs just open to the max and rely on the engine
boost/rev limiters to control the ALS rate.
There are so many ways of doing ALS but the whole ecu system must be set up and considered
to do the job properly.
seperate maps for ignition and fuel during ALS run time.
You cannot just add a few mods/bits and expect it to work !
The ALS valve should be activated/controlled by the ecu to regulate the air flow during ALS periods.
This is usually controlled by the ECU using pulse width modulation at high frequency to
control the valve position the same way an idle speed valve is controlled.
Some ALS valve installs just open to the max and rely on the engine
boost/rev limiters to control the ALS rate.
There are so many ways of doing ALS but the whole ecu system must be set up and considered
to do the job properly.
23-12-2004, 05:53 PM
#4
DEYTUKURJERBS
Thread Starter
I know this setup adjusts the fuel and ign with ALS activated, but barring that i havent got a fookin clue how it works and no easy way of finding out, seems a little basic, just trying to work out HOW basic...
23-12-2004, 06:02 PM
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When ALS is activated the following MAY apply.....
1) Lower level engine rev limiter
2) Lower level engine boost limiter
3) Increased fuel level (seperate map)
4) Intermittently retarded ignition 15-30 deg AFTER TDC (seperate map)
5) ALS valve position regulation to maintain desired air flow. (mapped)
6) Activation based on throttle position (throttle nearly fully CLOSED)
7) Activation limited to a time limit (Eg 5-10 seconds max)
8) Activation enabled by external switch
The easiest way to do this is to fit software in the ecu to do it.
On MOST weber systems, the ALS valve is wired into the idle speed output
and this is reused and/or for idle control too.
(This is why some cars idle high when converted to ALS
)
One way to do all this without touching the cars original ecu is to fit a piggyback
ecu to do this (such as a UNICHIP).
IMO, ALS is a waste of time and generally only used for bling effect
I am sure the rally boys will disagree with that though
1) Lower level engine rev limiter
2) Lower level engine boost limiter
3) Increased fuel level (seperate map)
4) Intermittently retarded ignition 15-30 deg AFTER TDC (seperate map)
5) ALS valve position regulation to maintain desired air flow. (mapped)
6) Activation based on throttle position (throttle nearly fully CLOSED)
7) Activation limited to a time limit (Eg 5-10 seconds max)
8) Activation enabled by external switch
The easiest way to do this is to fit software in the ecu to do it.
On MOST weber systems, the ALS valve is wired into the idle speed output
and this is reused and/or for idle control too.
(This is why some cars idle high when converted to ALS
)One way to do all this without touching the cars original ecu is to fit a piggyback
ecu to do this (such as a UNICHIP).
IMO, ALS is a waste of time and generally only used for bling effect
I am sure the rally boys will disagree with that though
23-12-2004, 06:15 PM
#6
DEYTUKURJERBS
Thread Starter
Cheers for the info, might give me somthing to go on... 
I deffo disagree there tho, generally only used as bling thats for sure and i hate that, but in my experience ALS has a huge effect in improving drivability when driving hard on twisty sections where you on-off or part-throttle a lot.
Makes the throttle responce much more linear like a n/a car, feels like a large n/a engine rather than a small capacity turbo, therefore far easier to control when caning round corners where full throttle is too much but part or off throttle isnt usually anywhere near enough.
To get rid of "lag" nah, to make throttle responce linear (due to no lag really) yes, loved it.
Originally Posted by SECS
IMO, ALS is a waste of time and generally only used for bling effect
I am sure the rally boys will disagree with that though
I am sure the rally boys will disagree with that though
Makes the throttle responce much more linear like a n/a car, feels like a large n/a engine rather than a small capacity turbo, therefore far easier to control when caning round corners where full throttle is too much but part or off throttle isnt usually anywhere near enough.
To get rid of "lag" nah, to make throttle responce linear (due to no lag really) yes, loved it.
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23-12-2004, 07:14 PM
#8
DEYTUKURJERBS
Thread Starter
Well, maybe that bit should say
if you dont do motorsport OR drive on the road like your competing in motorsport you dont need it
By the way, ive found out more about this "ALS" i mentioned...
The ALS is crude as fuck. There is a switch you ground, i.e. the clutch switch, that retards the timing and adjusts the fuelling. You can set the amount the timing is retarded(off the base map) and how much fuel is put in(off the base map).
The throttle is done with you foot.
The throttle is done with you foot.
Err, no, fuck that, no throttle bypass, just your foot, fuck that
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