Fuel dumping / over run
#1
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some of you lot at donny where having
flames on the overrun, now is this
on purpose i.e for brief cylinder cooling?
if so how much fuel?
what sort of ignition values?
obviously not good for mpg but
i have switchable maps so can
have this in 1 of the maps!
Lee
flames on the overrun, now is this
on purpose i.e for brief cylinder cooling?
if so how much fuel?
what sort of ignition values?
obviously not good for mpg but
i have switchable maps so can
have this in 1 of the maps!
Lee
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I think some of it could be down to the ECU - e.g. EsCos P8 ECU has fuel cut on overrun as std (although it can be altered) not sure that the older ECU's have this, so could be a combination of a bit of extra fuel by 'design' or due to the ECU.
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Originally Posted by leecavturbo
some of you lot at donny where having
flames on the overrun, now is this
on purpose i.e for brief cylinder cooling?
if so how much fuel?
what sort of ignition values?
obviously not good for mpg but
i have switchable maps so can
have this in 1 of the maps!
Lee
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
flames on the overrun, now is this
on purpose i.e for brief cylinder cooling?
if so how much fuel?
what sort of ignition values?
obviously not good for mpg but
i have switchable maps so can
have this in 1 of the maps!
Lee
![Top](https://passionford.com/forum/images/smilies/smile011.gif)
#5
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as far as i am aware all the cossie ecu have the fuel cut off programmed into them although mines not working (L6) it knows i have shut off the throttle but it is still firing the injectors so karl mapped it so the injectors where hardly delivaring any fuel!before this mine banged out flames due to the fuel!so long story short u want flames over ride the fuel shut off
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I noticed this on Dingys MK2 at donny. He was putting flames out for what seemed like ages at the end off the pit straight going into redgate!
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if its good for the engine then i want it.
i imagine the injection of fuel will cool
things internally pre ignition but then
in turn will this raise exhaust valve temps?
my map is here and you see no fuel @ say
5000rpm 0% throttle.
i imagine the injection of fuel will cool
things internally pre ignition but then
in turn will this raise exhaust valve temps?
my map is here and you see no fuel @ say
5000rpm 0% throttle.
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Originally Posted by leecavturbo
if its good for the engine then i want it.
i imagine the injection of fuel will cool
things internally pre ignition but then
in turn will this raise exhaust valve temps?
my map is here and you see no fuel @ say
5000rpm 0% throttle.
![](https://img.photobucket.com/albums/v333/leesturbo/map-2.jpg)
i imagine the injection of fuel will cool
things internally pre ignition but then
in turn will this raise exhaust valve temps?
my map is here and you see no fuel @ say
5000rpm 0% throttle.
![](https://img.photobucket.com/albums/v333/leesturbo/map-2.jpg)
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Should be an option somewhere, along with Acceleration Fuel Settings, and Decelleration Fuel Settings, or something along those lines.
I'm sure Martin will sort it
I'm sure Martin will sort it
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#14
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Originally Posted by Stu @ M Developments
Originally Posted by leecavturbo
if its good for the engine then i want it.
i imagine the injection of fuel will cool
things internally
i imagine the injection of fuel will cool
things internally
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#15
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Originally Posted by bluescortcossie
i think he means that the fuel is igniting in the exhaust not the chambers so there for the unburnt fuel is lowering chamber temp by not burning and carry heat out with it
Smoke would be the last of your problems after a couple of thousand miles! You would need a new engine!
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How are you proposing to turn off your spark to enable this engine wear, i mean cooling?
Its amazing how many different stories you hear to cover up bad mapping, it really is!!
#17
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Originally Posted by Stu @ M Developments
Originally Posted by bluescortcossie
i think he means that the fuel is igniting in the exhaust not the chambers so there for the unburnt fuel is lowering chamber temp by not burning and carry heat out with it
Smoke would be the last of your problems after a couple of thousand miles! You would need a new engine!
![Surprised](https://passionford.com/forum/images/smilies/shocked.gif)
How are you proposing to turn off your spark to enable this engine wear, i mean cooling?
Its amazing how many different stories you hear to cover up bad mapping, it really is!!
#18
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Originally Posted by Stu @ M Developments
Originally Posted by bluescortcossie
i think he means that the fuel is igniting in the exhaust not the chambers so there for the unburnt fuel is lowering chamber temp by not burning and carry heat out with it
Smoke would be the last of your problems after a couple of thousand miles! You would need a new engine!
![Surprised](https://passionford.com/forum/images/smilies/shocked.gif)
How are you proposing to turn off your spark to enable this engine wear, i mean cooling?
Its amazing how many different stories you hear to cover up bad mapping, it really is!!
![Surprised](https://passionford.com/forum/images/smilies/bigcry.gif)
#21
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Originally Posted by pani_k
So is it something that's mappable then with a custom map if wanted. Say for example on my focus could it be done on a custom map if I asked?
Just curious...
Just curious...
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Stu thats why i asked if its good thing for the engine,
i.e how much fuel to put in
how much igniton etc
if there is no advantage i don't want it
as i said earlier
i.e how much fuel to put in
how much igniton etc
if there is no advantage i don't want it
as i said earlier
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#23
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would it cool the valves? well im guessing here but as petrol absorbs heat energy 7-10 times faster than air, i would say yes!
would i map it in! No, because of the point stu makes!
crazy thing is, turbo F1 cars did it,,, ALOT but im not sure of the reasons
would i map it in! No, because of the point stu makes!
crazy thing is, turbo F1 cars did it,,, ALOT but im not sure of the reasons
#24
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Originally Posted by leecavturbo
Stu thats why i asked if its good thing for the engine,
i.e how much fuel to put in
how much igniton etc
if there is no advantage i don't want it
as i said earlier![Confused](https://passionford.com/forum/images/smilies/icon_confused.gif)
i.e how much fuel to put in
how much igniton etc
if there is no advantage i don't want it
as i said earlier
![Confused](https://passionford.com/forum/images/smilies/icon_confused.gif)
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Originally Posted by GARETH T
Originally Posted by leecavturbo
Stu thats why i asked if its good thing for the engine,
i.e how much fuel to put in
how much igniton etc
if there is no advantage i don't want it
as i said earlier![Confused](https://passionford.com/forum/images/smilies/icon_confused.gif)
i.e how much fuel to put in
how much igniton etc
if there is no advantage i don't want it
as i said earlier
![Confused](https://passionford.com/forum/images/smilies/icon_confused.gif)
![Red Faced](https://passionford.com/forum/images/smilies/icon_redface.gif)
but on the trackdays you do give it some stick ,
Wot,higher revs than normal, so if that leads to hotter
things can that be a problem potentially and if so
will a little cooling off throttle help?
as we all know on Wot we can cool cylinder temps with
more fuel to reduce det / excessive egt i guess, but these are all
question not statements so if i'm wrong i wanna learn
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#26
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if its needs cools it will be on WOT not when you let off, and it suddently has a couple of massive gulps of fresh air!
making sure you valve guilds have the correct clearance, and valve to valve seats are of the correct fitment is a much better way of ensuring a cooler valve
making sure you valve guilds have the correct clearance, and valve to valve seats are of the correct fitment is a much better way of ensuring a cooler valve
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Originally Posted by GARETH T
Originally Posted by pani_k
So is it something that's mappable then with a custom map if wanted. Say for example on my focus could it be done on a custom map if I asked?
Just curious...
Just curious...
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#34
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Originally Posted by GARETH T
crazy thing is, turbo F1 cars did it,,, ALOT but im not sure of the reasons
#35
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Originally Posted by Stavros
Originally Posted by GARETH T
crazy thing is, turbo F1 cars did it,,, ALOT but im not sure of the reasons
'OR' may be one of the 'naf' tuners of the ford world mapped them.
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Charged the customer for a full remap, then just do full throttle, and leave everywhere else mega rich, so it runs smoothly.
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Originally Posted by GARETH T
is it worth paying the expense just to tip fuel down your exhaust? ![Surprised](https://passionford.com/forum/images/smilies/bigcry.gif)
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Like i said just curious to know if its possible to have it on a custom map. And I don;t really want flames and huge bangs, but a little bit of bang pop pop pop bang would be nice
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Originally Posted by Jay.
Originally Posted by 4x4
Water injection for cooling?????????
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