Biiiiiig flameout. Is this good.
Discussion
Had a brisk run home last night from fellow beards and jumpers meeting at Essex PCGB last night, and after a bit of 'sustained' acceleration, had the road light up behind me between gear changes, then a big prolonged burn on the overun. Never had this last month, but had a full from scratch re-map at Owen Developments due to drivability issues at cruising throttle.
Does this mean it is too rich, or just unburnt fuel on throttle shutdown, ignition back off?
I see this stuff going on at Le-man with the GT2 993's back in the late '90's, but should this be happening on a road car?
I calmed down considerably when I encountered a fully tooled up battenberg 5 series, but got me thinking, would it warrant a tug if they spotted flame ( obviously would with a proper bit of acceleration!)?
Does this mean it is too rich, or just unburnt fuel on throttle shutdown, ignition back off?
I see this stuff going on at Le-man with the GT2 993's back in the late '90's, but should this be happening on a road car?
I calmed down considerably when I encountered a fully tooled up battenberg 5 series, but got me thinking, would it warrant a tug if they spotted flame ( obviously would with a proper bit of acceleration!)?
king awesome. As long as its not damaging the car, I'd love to have a fire-spitting dragon!No. Not good. And a sign the custom tune/flash needs tweaking. At least
The excess fuel being burned means unburned fuel passed through the combustion chambers. Well, most of it. Some gets on the cylinder walls and this washes away oil and dilutes the oil. Both of these are bad.
I'd advise you to get this sorted out sooner rather than later.
The excess fuel being burned means unburned fuel passed through the combustion chambers. Well, most of it. Some gets on the cylinder walls and this washes away oil and dilutes the oil. Both of these are bad.
I'd advise you to get this sorted out sooner rather than later.
No cats, so no bother there.
I was thinking, maybe it is just all the air and fuel on boost, that sudenly shuts down between say, gear changes which fills the exhaust with a surpless of unburn fuel. I mean you see racers doing it, with the might of Porsche motorsport behind them in endurance racing. And I am sure they would not have fuel washing the bores out on them?
Also, how does the long arm of the law veiw such stuff. It is odd that it never happened before the re-map, and the two lambdas read much richer running than they do now, and economy is much improved.
It just dont make sence.
I was thinking, maybe it is just all the air and fuel on boost, that sudenly shuts down between say, gear changes which fills the exhaust with a surpless of unburn fuel. I mean you see racers doing it, with the might of Porsche motorsport behind them in endurance racing. And I am sure they would not have fuel washing the bores out on them?
Also, how does the long arm of the law veiw such stuff. It is odd that it never happened before the re-map, and the two lambdas read much richer running than they do now, and economy is much improved.
It just dont make sence.
Don't think it's a big deal unless you want the engine to do 100,000 miles.
The race cars have their engines rebuilt regularly.
Ask the guy who mapped it what the problems could be, would think it would only petrol wash the bores if there was a fueling issue, however you've just got a little excess burning off on the hot exhaust........
Nice
The race cars have their engines rebuilt regularly.
Ask the guy who mapped it what the problems could be, would think it would only petrol wash the bores if there was a fueling issue, however you've just got a little excess burning off on the hot exhaust........
Nice
Rockster said:
No. Not good. And a sign the custom tune/flash needs tweaking. At least
The excess fuel being burned means unburned fuel passed through the combustion chambers. Well, most of it. Some gets on the cylinder walls and this washes away oil and dilutes the oil. Both of these are bad.
I'd advise you to get this sorted out sooner rather than later.
I doubt that.The excess fuel being burned means unburned fuel passed through the combustion chambers. Well, most of it. Some gets on the cylinder walls and this washes away oil and dilutes the oil. Both of these are bad.
I'd advise you to get this sorted out sooner rather than later.
Unburned fuel is in the chamber for 2 out of every 4 strokes, in any case.
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