Popping Sound On Aftermarket Exhaust

[fcruz3r]

Hi peeps,

Need some info on this before I head off to a muffler store. I have a 3inch (i think its cat back) exhaust with a cannon tip muffler which all came with the car direct from japan. Trouble is that under some heavy foot acceleration, the exhaust gives out this loud nasty pop when the gears change. I dont want to loose the 3 inch pipe work but the sound has really got to me. Anyone else with this problem? what exhaust do you guys have on your cars?

[stasis]

wat fuel ron are you using? 95 or 98? I find that woth BMWS and Mercs will have the poopong sound if filled with a 95 but none with the 98 ones.

[BoyWhoCriedWolf]

My wifes RS4 does the same thing. I think they over fuel a bit on lift off and hence the pop. My 260RS does the same thing with the standard exhaust (she does flames though, which is cool). That is being changed soon. I wouldnt worry too much about it,

Cheers,

Ken

[fcruz3r]

i run BP premium ...think its 95 ron. Will try switching to BP ultimate to see if it helps.

[Ska]

Yeah my old r33 shot 1-2mtr flames once I put that pipe of an exhaust on it, on gear changes.

[beastien]

Hi peeps,

Need some info on this before I head off to a muffler store. I have a 3inch (i think its cat back) exhaust with a cannon tip muffler which all came with the car direct from japan. Trouble is that under some heavy foot acceleration, the exhaust gives out this loud nasty pop when the gears change. I dont want to loose the 3 inch pipe work but the sound has really got to me. Anyone else with this problem? what exhaust do you guys have on your cars?

Sounds like the wastegate, but mine is more of a brrrt sound than a pop, mine is 3" turbo back.

[Terminal]

i've got a full 3" and have barely any noise at all, i think it depends on your tune. maybe you're running a bit rich?

[AlexCim]

we are all running a bit rich.

its fine, dont worry about it. welcome to the world of RB.

ive shot big ass flames, constant flames, black around the exhaust, its all fine.

[GoldZilla]

Mine pops on overrun, and quite regularly too. Mine has the standard ECU, but it's been converted to manual, so I can kinda induce the popping at will with some heel-and-toe or throttle stabs on downshifts.

Dunno if it shoots flames, but I'd like to find out. Might either get someone trusted to drive it one day as I follow, or get someone to follow me...

[AlexCim]

dont you guys let other people drive your cars?

i dont really care, i mean, i wont let a dickhead drive it but ive let mates take it into the hills with me there

[Ska]

Nope, ONLY myself and the wife drive it.

The only other time I have let someone else drive it was one of my best freinds when I was married, and even then I wasnt happy abou tit, but the wife insisted that we rode in the back, <sighs> so yeah.

No I do not like the idea of someone else driving my car, it is hard enough letting the wife bloody drive it..........

[stasis]

Nope, ONLY myself and the wife drive it.

The only other time I have let someone else drive it was one of my best freinds when I was married, and even then I wasnt happy abou tit, but the wife insisted that we rode in the back, <sighs> so yeah.

No I do not like the idea of someone else driving my car, it is hard enough letting the wife bloody drive it..........

Hei SKA so what you are saying id you value the car more than your wife?

AHAHAHH!!!!

Well to tell you the truth though i dont like people driving my car as well.

[AlexCim]

i LOVE getting driven by in my car

nothing like hearing YOUR car SUCK, FLUTTER and ROAR past

Then you think....so thats what it sounds like when i boost off in front of someone in a "fast" car, muahhaah

I got told my car sounds like "someone roaring and ripping their throat open at the same time". I was like, oooooo, then yeh, it does

[fcruz3r]

Well i run the bog standard factory ECU so can't really say if im running lean or rich....good enuff cause to get a stoich meter installed. anywayz if the car runs rich on the standard ecu ...does that mean we can get away with using 91 ron pulp?

and just side tracking on the issue, how much boost can I run on the factory ecu before the injectors max out, the fuel pump suffers a heart attack or the MAF goes crazy <<whichever comes first

[66yostagea]

Mine is a stocker with 3" cat back. It always has a nice burble on back off with the odd snap crackle and pop up the top, after hard acceleration.

Exit is very sooty, dont know if it flames. Got to get the DFA finished and fitted.

[QIKEXT]

hey fcruz3r, check your plugs and buy new ones and gap them at 0.8 this shoulf fix your problem reset the computer and put BP ultimate ot shell optimax in and it should be as good as new and wit the pop in between gear changes this is normal as long as its only one missfire

[EGA41T]

dont you guys let other people drive your cars?

not a chance in hell, ive already had one of my cars written off by a mate and i'll be damned if im gonna let anyone drive my car again. not even my girlfriend.

the other day my dad moved my car from out of his workshop to the parking bay (about 10 metres) and put the front bar into the gutter.....NOT HAPPY JAN!

[BoyWhoCriedWolf]

The Autech front bars are a bitch, they sit very low (aftermarket sus doesnt help) and stick out a mile. Mines been off once for painting and is just about due again!

[fcruz3r]

Thanks for the tip QIKEXT. Yea currently its just a single loud pop between gear shifts...must be just an RB thing. I'll get the new plugs anyway ...do you know the exact code number/make for the oem plugs? what about resetting the ecu..how is that done...is that like disconnecting the battery terminals for a couple of minutes before putting them back on?

[Ska]

I thought to reset the stock ecu, dissconnect battery, pump the brakes to discharge any capacitors still holding charge through the brake lights, reconnect battery.

But I still fail to see what that actually accomplishes, I mean it doesnt store any data, does it?