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Flaming exhaust...but how.

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Old 17 February 2005, 09:42 PM
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SC008Y_MAD
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Default Flaming exhaust...but how.

My dad and i followed a Scooby 'Classic' and it was flaming. My dad said he had never had seen a car do that before and he wanted to know how is was possible. I know about flamer kits.

Cheers

Darren

Sorry is this has been answered before etc...
Old 17 February 2005, 09:54 PM
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dazc
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It is probably anti lag as rally cars use.
When you put your foot down in a turbo charged car, you get a moment where there is a delayed response time for the turbo to spin up to provide power. This is called turbo lag.
Anti lag basically retards the cars timing, so when you come off the throttle fuel is ignited within the turbo/exhaust which keeps the turbo spinning fast (ie no lag=instant response) hence the occasional flames.
Usually accompanied with a loud bang!
Old 17 February 2005, 09:57 PM
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SC008Y_MAD
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This did not have a loug bang. a few pops at the most. but No bangs.

But what about a Scooby without antilag??
Old 17 February 2005, 10:01 PM
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Mine doesn't really pop & bang, or light up the countryside behind me orange unless I have the anti lag switched on. Daz
Old 17 February 2005, 10:14 PM
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Cheers for that info mate.


Darren
Old 17 February 2005, 11:13 PM
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you can get it with well wrapped headers,downpipe and full de-cat running a little rich. you do get the odd flame.
Old 17 February 2005, 11:31 PM
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Flames generally mean the car isn't running right, or you're a loser and fitted a spark plug in the tailpipe

MB
Old 18 February 2005, 12:12 AM
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A bloke by me has a very well sorted Lotus Sunbeam. He took it for a few test runs up and down the road the other night

The thing sounds beutitful - webbers on full chat, spins up like a motorbike engine, revs like a Vtec...makes me pop my head out the winodw every time I hear it. I fear that this car could eat my scoob alive

You should see the flames it puts out on the gearshifts

Flames are caused by fuel in the exhaust igniting. This can be caused by a missfire....where not all the fuel is burnt in the combustion chamber, and is pushed into the hot exhaust. This can be both lean and rich fuelling as both will cause unburnt fuel to be present, although it is much worse when rich. Missfires- and associtaed backfiring (flames) are caused by lots of things, from incorrect fuelling (rich or lean) wild race cams with large inlet/exhaust valve overlap (such as the lotus above) or wrong cam timing, burnt exhaust valves, bad ignition components or timing- or in the case of Rover v8s a very slack timing chain! Did I cover everything?
Old 18 February 2005, 09:44 AM
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I think you covered everything.
cheers guts for your replys. now i know.
Darren

Originally Posted by ALi-B
A bloke by me has a very well sorted Lotus Sunbeam. He took it for a few test runs up and down the road the other night

The thing sounds beutitful - webbers on full chat, spins up like a motorbike engine, revs like a Vtec...makes me pop my head out the winodw every time I hear it. I fear that this car could eat my scoob alive

You should see the flames it puts out on the gearshifts

Flames are caused by fuel in the exhaust igniting. This can be caused by a missfire....where not all the fuel is burnt in the combustion chamber, and is pushed into the hot exhaust. This can be both lean and rich fuelling as both will cause unburnt fuel to be present, although it is much worse when rich. Missfires- and associtaed backfiring (flames) are caused by lots of things, from incorrect fuelling (rich or lean) wild race cams with large inlet/exhaust valve overlap (such as the lotus above) or wrong cam timing, burnt exhaust valves, bad ignition components or timing- or in the case of Rover v8s a very slack timing chain! Did I cover everything?
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