Mazda Rotary Club

General => General Technical => Anything Engine/Performance/Tuning related => Topic started by: yellowvette on February 05, 2013, 01:48:49 AM

Title: engine pop and bang with flamethrower ??
Post by: yellowvette on February 05, 2013, 01:48:49 AM
Hi I just buy vintage red FD3S from ryan and have some questions on it !
car run fine and good on boost no misfire or boost pressure loose, run good and do the 330BHP !!
but when I decellerate slowly the car pop and bang really loud like a kalashnikov or one canon shot throught the apexi exhaust always between 2000/2500 rpm....when I decellerate in one time (just put of the foot of the accelerator pedal) car decellerate normaly with little pop sometimes but really less shotgun fire !
and on the highway I do really big flames (50/70cm) throught the exhaust !
here is my setup

- Bilstein coilovers
- HKS SSQV
- 6000k HIDS
- Apexi GT exhaust
- Silenced midpipe
- FEED downpipe (wrapped)
- Border Racing induction
- TRUST intercooler
- Custom ducting
- 850 primaries
- Walbro 255
- Aeromotive stylee FPR
- Ported wastegate
- Apexi PFC

mapped by super7 in brighton

It\'s my first rotary so I don\'t know if it\'s normal or not on a modified 13B...I have one friends who tell me that\'s normal and ryan tell me it\'s normal too but I\'am a little anxious

and sorry for bad english as I\'am french

thanks
Title: engine pop and bang with flamethrower ??
Post by: yellowvette on February 05, 2013, 02:09:53 AM
the soud of the bang/pop it\'s the same than in this video
I have not boucing idle or other problems just to show you the sound of the bang throught the exhaust

http://www.youtube.com/watch?v=YD5VjnnJsNw
Title: engine pop and bang with flamethrower ??
Post by: yellowvette on February 05, 2013, 02:42:06 AM
I just foud exactly what happen on ly car it\'s exactly the same than that

http://www.youtube.com/watch?v=3D5DcnyxBrM

and on this forum it\'s not possible to edit our message ?
Title: engine pop and bang with flamethrower ??
Post by: yellowvette on February 05, 2013, 09:51:40 PM
Nobody to help me ?
Title: engine pop and bang with flamethrower ??
Post by: HaywardRotary on February 06, 2013, 09:37:27 AM
Dont worry thats normal.
Title: engine pop and bang with flamethrower ??
Post by: Bobbit on February 06, 2013, 12:47:49 PM
as above ^ thats fine, mine car pops and fires out flames, nothing to worry about
Title: engine pop and bang with flamethrower ??
Post by: yellowvette on February 06, 2013, 05:47:29 PM
ok tahks I\'am less stressed now and it\'s funny to affraid the sidewalkers XD
Title: engine pop and bang with flamethrower ??
Post by: neil_jdmr on February 06, 2013, 06:46:40 PM
Yeah don\'t worry flames and bangs are part of the rotary appeal
Title: engine pop and bang with flamethrower ??
Post by: shaunwil on February 07, 2013, 06:06:23 PM
Plus you can ask someone kindly not to drive up your rear bumper with a nice pop and flame :D

Sometimes all you get to hear is the fuel igniting in the exhaust without any flames, always great at night :D

Shaun