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View Full Version : Pops, Bangs & Flames - NOT



Mark Pitchford
12th October 2000, 15:49
Guys,

I've got a fully decatted exhaust comprising of:

Falkland Downpipe
Magnex centre (with Silencer)
Magnex Backbox

Would anybody know why this kind of system wouldn't produce pops and bangs and flames?

My car is a '94 WRX wagon.

Mark

[This message has been edited by Mark Pitchford (edited 12 October 2000).]

Stef
12th October 2000, 17:54
Ermmm.....perhaps because of the silencer? http://bbs.22b.com/ubb/rolleyes.gif http://bbs.22b.com/ubb/biggrin.gif

Stef.

Mark Pitchford
13th October 2000, 07:50
Stef,

I don't think it's because of the silencer. Other people with the *exact* same system get flames, and I don't.

Not that I'm particularly bothered about pops and flames, it's just that I hope I'm getting the *full* benefit of the mods that I have made.

Mark

MarkF
14th October 2000, 10:26
My car (93 WRX) pops with the original downpipe in it!
Just my 2p worth
Mark

sunilp
14th October 2000, 13:35
Dont flames result from too much fuel/rich mixture meaning you are then "not getting the best out of it" (performance wise anyhow)??

JOHN.D
14th October 2000, 15:56
Surely getting pops, bangs and flames on the overrun means raw fuel is within the system, which must have been happening (internally) when the cats. were in place. Raw fuel + hot cat.= bad news? It is usual for the injection system to switch off on closed throttle. My downpipe equiped 99my pops on the overrun just like the rest of them.
Is there a Scoob tuner, mechanic etc. out there who knows wether the system shuts off on the overrun?
JohnD

MorayMackenzie
17th October 2000, 23:21
Stef,

My magnex mid-pipe's silencer must be faulty... I get flames, pops, bangs et al... Who would you suggest I talk to about getting it fixed? http://bbs.22b.com/ubb/wink.gif http://bbs.22b.com/ubb/smile.gif

Moray

MorayMackenzie
17th October 2000, 23:25
Mark,

If you really need the pops, bangs and other bits and you have a standard ECU, you could consider fitting an externally venting blow-off-valve... such as the bailey piston evo. These BOV's will fool the ECU into overfuelling on lift off, hence pops and bangs etc... and a BOV whistle/whatever noise. Bailey piston evo is similar mechanism to HKS super sequential blow off valve but at less than 100 quid, rather than 250 ish plus.

Moray

Mark Pitchford
18th October 2000, 11:11
Thanks Moray,

As I said the pops & bangs & flames are not what I wanted, I was just wondering if the system was performing as it should.

I have now been reassured from many kind people that there decatted system performs the same as mine.

By concensus it's the difference in fueling between cars.

Mark

Stef
19th October 2000, 14:06
Moray.
We don't all have the facility to dump a gallon of fuel into our exhaust at will though do we? http://bbs.22b.com/ubb/smile.gif

Stef.

Stef
19th October 2000, 14:06
Moray.
We don't all have the facility to dump a gallon of fuel into our exhaust at will though do we? http://bbs.22b.com/ubb/smile.gif

Stef.

Lee
20th October 2000, 22:26
John.D there must be something wrong with your MY99 http://bbs.22b.com/ubb/wink.gif

Had this same chat with PeteC after SteveD wondered why mine wasn't making half the racket his was.

Turns out that 98 and earlier cars overfuel on the overrun, hence the pops and flames. 99 onwards cut the fuel on overrun hence nothing.

The Link must also cut fuel since I get nowt when equipped with that.

JOHN.D
21st October 2000, 14:09
Lee
The pops I get on the overrun are really only just detectible, and then only at low speed, certainly no bangs! So I think the E.C.U. is shutting off the fuel as it should.
It has only been noticable since the S.S. downpipe went on.
John.D

Danny Fisher
21st October 2000, 15:25
Lee, I have an MY97 with the Link installed. I would say that I now have MORE pops and flames since fitting the Link than before. Maybe just maybe my setup is running rich. But then I'm happy with the way it's running so I'm leaving well alone.

Dan