Jump to content
SAU Community

Backfiring

Primordial

By Primordial,
in Engines & Forced Induction

 Share

Recommended Posts

frankxinyu Mentor

frankxinyu

Posted
Posted
PEOPLE PEOPLE!!!!

can we please get the term right

AFTER-FIRE

AFTER-FIRE

AFTER-FIRE

back fire is where you get flames out of your INTAKE

thanksyou ;)

what??

obn topic, i am running the stock BOVs, with PFC, and a safe tune on it. mine backfires quite a bit. it even throws flames sometimes at high rpm. i believe it is quite safe, it is just running a tiny bit rich.

Primordial Grand Master

Primordial

Posted
  • Author
Posted
PEOPLE PEOPLE!!!!

can we please get the term right

AFTER-FIRE

AFTER-FIRE

AFTER-FIRE

back fire is where you get flames out of your INTAKE

thanksyou :)

Technically correct, thanks.

How many people would know what afterfire is though? :happy:

The Alchemist Collaborator

The Alchemist

Posted
Posted

personally I like a good backfire on a gearchange or decel but " hey" thats just me :yes:

If you find it a problem there are a couple of things you can change on your PFC settings to remove or lessen the effect.

Firstly your accel pump settings are set quite high from factory with the PFC. So any slight blip on the throttle pumps in a fuel but little air. This hits the hot exhaust with the usual pop pop crack sound. You can even "make" it do it on a trailing throttle by tapping the throttle lightly on decel.

Dropping these accel back from the 4 or 5 ms factory down to 2 or 3ms improves things.

Secondly the bottom fuel row settings have a big effect on trailing throttle overrun and can by reduced (carefully) to reduce exhaust popping. The PFC does have fuel cut on overrun I know but these bottom row settings do have an effect.

Cheers,

Mike

Primordial Grand Master

Primordial

Posted
  • Author
Posted
You can even "make" it do it on a trailing throttle by tapping the throttle lightly on decel.

Hahaha... this is exactly how i've been scaring unsuspecting pedestrians :yes:

Thanks Mike, great info!

I'll give this a try :P

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Latest Posts

    • Nizzy_R34
      r34's love to squeal

      By Nizzy_R34 · Posted

      just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • Duncan
      Engine sputter

      By Duncan · Posted

      My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Duncan
      S1 Autech 260RS Wiring Diagrams

      By Duncan · Posted

      Awesome, thanks for sharing!
    • Duncan
      Nissan fuga 450gt android screen

      By Duncan · Posted

      To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
    • GTSBoy
      Nissan fuga 450gt android screen

      By GTSBoy · Posted

      So, now all you need to do is connect the 2 or 3x 12v feeds into the unit to permanent 12v, ACC 12V and IGN 12V that you can find in the spot behind the stereo, and the earth, and then it will switch on with the car.
×
×
  • Create New...