Bossko

What is it that makes some exhausts pop and bang and others don't. Is due to excess fuel being feed into a hot exhaust? and is this bad for the car and how is it achieved?

Cheers.

TINO.wrx

iTrader: (5)

all i can say is so far you've answered your own question in the first part of your questions. but as to to the bad for your car, ive no idea. it can be acheived with apping fuel on overrun

Bossko

So how would i go about doing this?

RA Dunk

you cant, it needs to be dialed in via the ECU

darms

iTrader: (5)

One way is to have a full decat and a vta dump valve

GazTheHat

Yes. No. Mapping.

bob wrx

iTrader: (1)

[QUOTE=darms;9188498]One way is to have a full decat and a vta dump valve [/QUOTE

my old hks system used to pop like mad now on to a 3" revolution system and it never pops at all? still running same decat and standard ecu? fueling was spot on when rolling roaded with both systems!

RA Dunk

That dosent guarantee anything, getting it mapped to do it on the over run is the only way unless you get A/L fitted

basssound

Or use a faulty MAF so that it's sending dodgy readings to the ECU, too much fuel is an effect of this

RA Dunk

lol if you really want to blow up your engine for the sake of a few pops and bangs go right on ahead

basssound

I wouldn't condone this at all RA Dunk!!
Just saying, one side effect that's all.

I find in the Classic, third gear downhill at high revs or a slow gear change causes a small amount of popping.

KINGTIGER

I have a Apexi exhaust and when I find the car has been run for a while she will pop and bang when I'm slowing down say coming into a thirty.

I like it snap crackle an pop

ReggieMY99

Try blip the throttle a bit while going like that, get the exhaust/downpipe really hot and you get some really loud ones too

dont hink it causes any damage to your engine

macmac

iTrader: (1)

think it was ecutek'ed into myne when getting tweak , not every time , but a nice gunshot when changing gears slowly


luv it !!

Ciaran

iTrader: (16)

I had Andy F add some pops and bangs when getting a remap. Sounds brilliant and i get flames on upchanges when driving enthusiastically

scoobydoo_done_u

iTrader: (8)

i thought when a subaru pops and bangs its got a anti lag fitted

RA Dunk

Nope the cheapo way to do it is get it mapped to over fuel on the overrun, but you will have no control over this, once its on its on (unless things have changed and it can now be turned off??) you might like the sound to start with but will eventually get fed up of it, I know a few people who have went back after a remap to get it turned off

Vr5RA_Matchew

iTrader: (2)

My old system used to pop and bang like crazy but since fitted the nur spec it doesnt do it at all, might change within time though

jaytc2003

iTrader: (1)

sure if your car can be ecuteked you can have dual maps, the pops and bangs are done by negative timing and more fuel. You can control it by your right foot

RA Dunk

So you can turn this on and off with your right foot?

GazTheHat

Not me, i never tire of it. Over 2 years now. Still like giving people heart attacks, turn peoples heads and the sound of a car i used to watch in the forest.

midnight

iTrader: (10)

When i had a prodrive backbox on my car it never popped or banged at all,only since changing to the afterburner vortex has it done this + get the occasional flameout when gunning it from 2nd ,.It pops and bangs when you lift off the gas,without even trying.

taylormade89

im running a blitz nur spec R with down pipe decat on some hi reving gear chages mine has a loud pop then flame/spark is that just overfueling a tap? or just the blitz? not sure if its been remap on uk fuel yet

this there any way i can tell with out taking it to a mapper?

harvey

iTrader: (48)

The pops and bangs are unburned fuel exploding in the exhaust system.
This can be achieved by over fuelling the car on the overrun and providing the exhaust is hot the fuel will ignite in the exhaust giving you pops and bangs.
Anti lag has the same effect but with that you can switch it off.
To get pops and bangs you are using more fuel than necessary and neat fuel is passing through your engine and out in to the exhaust system and long term this cannot be good for the health of your engine.
Remember that rally cars can get a new engine for every event and even in Group N a rebuild once a season is very common.
You can increase the probability of pops and bangs by drilling a couple of small holes in the top of your downpipe which allows air and hence oxygen in to your exhaust system after the turbo. Not recommended but if you want pops and bangs it certainly helps.

taylormade89

how do i get rid of the sparks/flames

remap?

RA Dunk

yup, a remap should sort the fueling out nicely

GazTheHat

The amount of fuel is negligible and i see no loss in economy and was told it is far from bore wash and not bad.

0victory0

iTrader: (4)

My dads got a uk classic decatted same as mine. He's got an after burner back box and I have a ninja 2, that's the only difference the rest of the exhaust on both cars are Hayward and Scott but his pops and bangs but he has an updated fuel pump so this could be the reason