exhaust popping

1. rosebud Newbie Joined: Nov 2005 stoke Posts: 24

   #1 18th September 2006, 07:55

   hi everyone just a quick question recently had a racing exuast put on got 4 into 1 manifold and straight through exhaust but now my magnex backbox sounds abit crap just a booming noise.just wounderd what you would recomend want somthing not to loud but sounds sweet.also every time i change gear my exhaust pops but only when i put the clutch in and change gear is this ok?why does it do this?
2. lambinator Established Member Joined: Sep 2005 bury st edmunds United Kingdom (England) Posts: 1167 saxo furio soon gti

   #2 18th September 2006, 08:00

   back pressure.
   
   piper seems to be good from everyone here. but go powerflow
3. rosebud Newbie Joined: Nov 2005 stoke Posts: 24

   #3 18th September 2006, 08:19

   is it ok for it to pop like that then?
4. WestyVTR Saxperience Forum Bum Joined: Nov 2004 Gosport Posts: 3140 saxo VTR, Clio 1.2 turbo, prious, Kawasaki 363 nin

   #4 18th September 2006, 08:41

   its the back pressure that makes it pop, when it releases pressure it goes pop.. shouldnt pop alot! this may indicate that its blowing, from my experience anyways... i also have a 4-1 & straight thru zorst it does pop too & very loud. love it...
5. rosebud Newbie Joined: Nov 2005 stoke Posts: 24

   #5 18th September 2006, 08:51

   just woundering what type of back box do you have on yours
6. Josh_Phipps Established Member Joined: Jun 2006 Aylesbury, Bucks Posts: 1867 Mk 2 Vtr (sold), Fiat Seciento Sporting

   #6 18th September 2006, 09:50

   Ive got a Pro-Tech 4-2-1 Manifold, Magnex De-cat, Ashley Comp Exhaust and i F**king Love the raspy poping and spitting sound my car make swhen im gearing down, its not causing any harm so all is good
7. GazOpti Regular Poster Joined: Feb 2005 Caerphilly United Kingdom (Wales) Posts: 406

   #7 23rd September 2006, 11:54

   Does a manifold make an exhaust 'pop' more then?
   
   Ive got a decat/straight through exhaust and it pops a little but only when i use the gears to slow the car down...and i have to be going at the right speed to do it.
   
   If i get a 421 manifold will it make it pop more???
8. S34MER East Midlands Joined: Jun 2006 Derby Posts: 8305 Skoda Fabia VRS

   #8 23rd September 2006, 12:06

   love the sound of my exhaust, i have to go down a hill, to get to my house, and i usually drop it into 2nd and use the engine break to slow me down, and it always pops and gargles, loads of peeps comment on it, saying how healthy it sounds!!
9. user_11402 Established Member Joined: Aug 2006 Bristol Posts: 2015 MK2 VTS

   #9 23rd September 2006, 12:08

   ye i think the popping sounds imense lol
10. hesslevtr Saxperience Hardcore! Joined: May 2004 Hull (England) Posts: 18709 1.6 vtr

    #10 23rd September 2006, 12:14

    i have a gmc 4-1 and the rest piper on mine and it pops sometime when i release the acelerator and slow down
    
    think its more to do with the dacat then manifold but my manifold acts as a decat
11. bullit Saxperience Hardcore! Joined: Dec 2005 e-hollywood Posts: 17160 toyata hilux

    #11 23rd September 2006, 12:54

    lol at seamer. i like going through long tight bridges over water. sounds meaty as
    
    check for blowing though aswell
12. starkie Saxperience Forum Bum Joined: Feb 2004 Kent United Kingdom (England) Posts: 3912 Black Saxo VTS

    #12 23rd September 2006, 13:58

    No Manifold on mine.. De-Cat tho..
    
    Sounds mental when changing down through gears..
    
    Pop Pop..
13. fredjudd Established Member Joined: Aug 2006 Salisbury Posts: 1118 Saxo VTR full Janspeed exhuast (4-2

    #13 23rd September 2006, 19:39

    Ive got a full janspeed exhuast including de cat and 4-2-1 manifold. As I have only had the manifold for 2 days and its starting to bed in now and she is making alot more noise
    !
14. Josh_Phipps Established Member Joined: Jun 2006 Aylesbury, Bucks Posts: 1867 Mk 2 Vtr (sold), Fiat Seciento Sporting

    #14 23rd September 2006, 19:41

    Too much popping must only be a Bonus..
15. fredjudd Established Member Joined: Aug 2006 Salisbury Posts: 1118 Saxo VTR full Janspeed exhuast (4-2

    #15 23rd September 2006, 19:43

    you know its good when on over run it gurgles, pops and then goes BOOM! lol
16. Josh_Phipps Established Member Joined: Jun 2006 Aylesbury, Bucks Posts: 1867 Mk 2 Vtr (sold), Fiat Seciento Sporting

    #16 23rd September 2006, 19:47

    Yea, gets attention aswell when its spitting n popping everywhere
17. Ax_beefy Frequent Poster Joined: Jun 2006 Cannock Posts: 973 Citroen AX VTS

    #17 23rd September 2006, 21:37

    The seal between the mani and downpipe on my original manifold was fucked and my car used to pop like a bitch at high revs, I also found that turning my fuelling down (something you lot can't do as I have a potentiometer) helped get rid of it as there were pockets of unburnt fuel being ignited when it mixed with the air. Once the mani was sealed it was fine again
18. fredjudd Established Member Joined: Aug 2006 Salisbury Posts: 1118 Saxo VTR full Janspeed exhuast (4-2

    #18 23rd September 2006, 22:30

    none of this carb shite, injection cars pop when they are tuned/ragged (delete as appropriate)
19. Ax_beefy Frequent Poster Joined: Jun 2006 Cannock Posts: 973 Citroen AX VTS

    #19 23rd September 2006, 22:52

    My car is injection!... but it is pre-cat so I can freely adjust my fuel mixture!.... I have what is essentialy a 1.4 VTR same power but less torque and more revs
20. Easty Saxperience Forum Bum Joined: Jan 2006 Guiseley, Leeds Posts: 2608 Revo Stage 1 Leon FR

    #20 24th September 2006, 09:59

    think the de-cat is whats making the popping noise when you drop down your gears mate
    
    you can always get a silencer made up to get rid of it if you don't like it.
    
    love it on mine though, can't wait to get a 4-2-1!
21. rushy_23 Saxperience Hardcore! Joined: Aug 2004 West Mids Posts: 15392 '98 EK9 N1

    #21 24th September 2006, 10:08

    Cant beat a poppin gear change, enough said!
22. madsaxo L-plater Joined: Aug 2006 sunny rhyl Posts: 37 black saxo vts 52 plate

    #22 24th September 2006, 22:40

    i have a straight through pipe from the cat back n it pops n bangs all the time i had a decat on n it made it pop even more but was way 2 loud n got the wrong atention from the old bill so i took it off the popin noise is made by unburnt fuel egnighting in the hot exausti think it sounds ace
23. Graemep Saxperience Addict Joined: Sep 2004 Warrington, Cheshire Posts: 11649 FN2 Civic Type-R

    #23 24th September 2006, 22:43

    no de-cat on mine just a full cobra system and mine pops all the time!