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

    • soviet_merlin
      WGNC34 - floor mats

      By soviet_merlin · Posted

      Actually, I'd say all three are the automatic option. Just the different trim levels. The manual would be RSFS, no? 
    • soviet_merlin
      WGNC34 - floor mats

      By soviet_merlin · Posted

      What Duncan said sounds right. Also, it looks like they only have the driver's mat. Not the rest. Because looking at the diagram: KG4911 is just the mat for the driver. KG4900 is the full set if I'm not mistaken and discontinued.   But, it looks like they may still have the full set for the manual S2. Might be worth checking for the other models as well as they seem slightly different. https://www.amayama.com/en/genuine-catalogs/epc/nissan-japan/stagea/wgnc34/6649-rb25det/misc/G49 Man, I'm tempted.
    • GTSBoy
      WGNC34 - floor mats

      By GTSBoy · Posted

      I dunno about that as a blanket statement. Pitwork is Nissan's "Nissan genuine" thing, and for stuff like timing belts, I have found them to be excellent. Of course, for things like oil filters, you always use proper trusted brands anyway, not whatever the OEM has taken to using.
    • MBS206
      R34 Skyline climate control unit transistor

      By MBS206 · Posted

      Ahhhh... If you were putting 12V to the led in there, that's likely made it very unhappy. Chances are how you put power, was 12V across an LED that's meant to only have about 20mA through it at peak, and a forward voltage of about 1.8 to 2.4 volts. That circuit is likely only a 3V3 circuit, and will have a resistor in series with the led too. That's my guesstimate on that light, without having touched one.
    • Murray_Calavera
      Tein Circuit Master- rebuild worth it?

      By Murray_Calavera · Posted

      Another vote for installing them and see how you go.  I mean, you already own them, why would you not fit them? 
×
×
  • Create New...