Normal to blow some flames?

destinyZ · 12-30-2010, 07:49 PM

Mine will shoot a little smoke at red sometimes when I push it but other then that no one has said anything about a flame. Like mentioned before maybe its just the TP's?...

Vegitto-kun · 12-30-2010, 07:54 PM

you should be happy

flames are awesome.

red6spd · 12-30-2010, 08:35 PM

I wanna shoot flames!!!!!!!!!!! LOL

chuckd05 · 12-30-2010, 10:32 PM

lmao . The kid in the evo who saw it owns a barber shop and a lot of my friends go there and people keep asking me about my car and its "flame shooting"

BUT after looking back at my old charts it seems it used to run at about 13 towards redline... now its down around 12... so it is more rich... im not going to worry about it until spring though...

if anyone with tuning knowledge can chime in on the ideal a/f for our cars id appreciate it.. I think I may buy the cipher cable and get some date and start trying to learn to make sense of it.

tranceformer · 12-31-2010, 12:52 AM

it's the snow tires br0. that's gotta be it.

chuckd05 · 12-31-2010, 01:24 AM

Quote:

Originally Posted by tranceformer

it's the snow tires br0. that's gotta be it.

damn, you must be right, didnt even think of that ... the car is stoked to have some traction in the cold so its shooting flames out to celebrate... cant believe I didnt put 2 and 2 together.

TBOX · 01-01-2011, 01:12 PM

You don't have a sport do u?
I considered it might be the synchro rev but then I seemed to recall you having a base.

Junior370z · 01-01-2011, 02:12 PM

Bust out the marshmallows dude!

Flames out the tail pipes are awesome!

Oh and the flames are just unburnt fuel burning up in your exhaust from running a little rich. A common occurrence on modified cars.

Kastley85891 · 01-13-2011, 10:34 PM

Flat foot shifting on boost with high timing advance maybe... lol

Staples · 01-20-2011, 12:56 AM

Quote:

Originally Posted by Kastley85891

Flat foot shifting on boost with high timing advance maybe... lol

Other way around... retard the timing and it'll cause flames.

Staples · 01-20-2011, 12:57 AM

My cars shoots flames at times too. It depends on how restrictive your exhaust is and what kind of timing is in the tune. It's not all about air/fuel ratios.

xsnapshot · 01-21-2011, 12:01 PM

I'm pretty sure this is normal. And IIRC it's cause, is injector over-run.

There is a small delay between when you let off the gas, and when the injectors and spark plugs stop firing. I believe this is implemented from the factory to keep there from being a sudden slamming deceleration sensation when you lift off the throttle.

Since the throttle plate is closed, and very little air is moving through the system, the combustion is delayed and winds up moving far enough back in the exhaust system to see flames (on de-catted, high flow exhausts).

This has nothing to do with timing advance or the air fuel ratio you run while WOT. It is common on WRX/STI's and happens to me all the time.

Rally cars sometimes incorporate injector overrun to function as anti-lag. (there are other methods of antilag as well). When they lift off the throttle, the injectors and sparkplugs continue to fire for quite a while, and the expanding fireballs will keep the turbo spinning.

Kastley85891 · 01-21-2011, 01:01 PM

Quote:

Originally Posted by Staples

Other way around... retard the timing and it'll cause flames.

Depends how much fuel you are dumping... E85 22Psi at redline with a TMIC and stock BOV, 33 degs advance, FFS always had flames

ferking great sound too

Using launch control at 10 PSI was sweet too lol

bullitt5897 · 01-21-2011, 01:14 PM

Flames is normal and awesome!!! I had them with my s2000 and turbo back 3" exhaust on a N/A motor!!! freaking sweet sound and huge flames. what happens is the hot unburnt gas ignites when it reaches the significantly cooler air toward the end of your exhaust. I always joked with my buddies if they tailgated me at a red light I would melt their bumpers

I have some pics of a Supra at lil tally that I took and it was throwing out 3ft flames!!! it was EPIC!!!

NYBladeZ · 01-21-2011, 01:33 PM

I want to shoot flames

12-30-2010, 08:35 PM	#18 (permalink)
red6spd A True Z Fanatic Join Date: Apr 2010 Location: Long Island NY Posts: 3,277 Drives: 2010 Z Coupe M6 SPT Rep Power: 21	I wanna shoot flames!!!!!!!!!!! LOL __________________ 2010 Base+Sport 6spd: Stillen G3, FI Non-Resonated CBE, FI Non-Resonated Test Pipes, UpRev Tuned, Custom 24R Oil Cooler, JDM Rear Fog-OEM Harness. ???Whp ???WTQ (Will find out come spring time)

12-30-2010, 10:32 PM	#19 (permalink)
chuckd05 A True Z Fanatic Join Date: Oct 2009 Location: NY Posts: 2,391 Drives: No longer a Z Rep Power: 20	lmao . The kid in the evo who saw it owns a barber shop and a lot of my friends go there and people keep asking me about my car and its "flame shooting" BUT after looking back at my old charts it seems it used to run at about 13 towards redline... now its down around 12... so it is more rich... im not going to worry about it until spring though... if anyone with tuning knowledge can chime in on the ideal a/f for our cars id appreciate it.. I think I may buy the cipher cable and get some date and start trying to learn to make sense of it. __________________ 09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-) Last edited by chuckd05; 12-31-2010 at 12:37 AM.

12-31-2010, 12:52 AM	#20 (permalink)
tranceformer A True Z Fanatic Join Date: Nov 2008 Location: Palm Beach, FL Posts: 1,213 Drives: 2009 370Z PW 6MT Rep Power: 268	it's the snow tires br0. that's gotta be it. __________________ Ray 2009 370Z Base Sport 6MT / 12.860 @ 109.09mph / 1.921 60ft / street tires official 1/4 mile track times

01-01-2011, 02:12 PM	#23 (permalink)
Junior370z A True Z Fanatic Join Date: Apr 2009 Location: Las Vegas Age: 50 Posts: 1,024 Drives: over the speed limit Rep Power: 293	Bust out the marshmallows dude! Flames out the tail pipes are awesome! Oh and the flames are just unburnt fuel burning up in your exhaust from running a little rich. A common occurrence on modified cars. __________________ DON'T DO IT! ( Click to show/hide ) Stillen CBECAI-U/D PulleyGround KitSwaysSetrab Oil CoolerIchiba Rear Camber KitAgility CoiloverBerk HFCTechnosquare TuneGT-R ButtonVenaci MeshSP Performance Cross Drilled/Slotted RotorsSPC Toe BoltsBomex LipMud flapsAero Jacket Type III WingSold Last edited by Junior370z; 01-01-2011 at 02:19 PM.

01-13-2011, 10:34 PM	#24 (permalink)
Kastley85891 A True Z Fanatic Join Date: Nov 2009 Location: ATX 370 - Sold Posts: 1,149 Drives: 2003 Wagon Rep Power: 18	Flat foot shifting on boost with high timing advance maybe... lol __________________ Boosted V8 hunter 2850 lbs and 375WHP

12-30-2010, 07:49 PM	#16 (permalink)
destinyZ Enthusiast Member Join Date: Apr 2010 Location: Guam, USA Age: 36 Posts: 415 Drives: FROM INDIANA Rep Power: 15	Mine will shoot a little smoke at red sometimes when I push it but other then that no one has said anything about a flame. Like mentioned before maybe its just the TP's?...

12-30-2010, 07:54 PM	#17 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 262	you should be happy flames are awesome.

01-01-2011, 01:12 PM	#22 (permalink)
TBOX Enthusiast Member Join Date: May 2009 Location: Upstate New York Posts: 356 Drives: 09 370z MB M6 Rep Power: 16	You don't have a sport do u? I considered it might be the synchro rev but then I seemed to recall you having a base.

01-20-2011, 12:57 AM	#26 (permalink)
Staples Track Member Join Date: Sep 2010 Location: Baltimore, MD Posts: 546 Drives: '08 Infiniti G37s Rep Power: 16	My cars shoots flames at times too. It depends on how restrictive your exhaust is and what kind of timing is in the tune. It's not all about air/fuel ratios. __________________ '08 Infiniti G37s - Forced Induction Fed

01-21-2011, 12:01 PM	#27 (permalink)
xsnapshot Base Member Join Date: Jan 2011 Location: Nebraska Posts: 21 Drives: 2004 WRX Rep Power: 14	I'm pretty sure this is normal. And IIRC it's cause, is injector over-run. There is a small delay between when you let off the gas, and when the injectors and spark plugs stop firing. I believe this is implemented from the factory to keep there from being a sudden slamming deceleration sensation when you lift off the throttle. Since the throttle plate is closed, and very little air is moving through the system, the combustion is delayed and winds up moving far enough back in the exhaust system to see flames (on de-catted, high flow exhausts). This has nothing to do with timing advance or the air fuel ratio you run while WOT. It is common on WRX/STI's and happens to me all the time. Rally cars sometimes incorporate injector overrun to function as anti-lag. (there are other methods of antilag as well). When they lift off the throttle, the injectors and sparkplugs continue to fire for quite a while, and the expanding fireballs will keep the turbo spinning.

01-21-2011, 01:14 PM	#29 (permalink)
bullitt5897 Premium Member Join Date: Jan 2009 Location: North GA Posts: 6,831 Drives: Twin Turbo Z34 Rep Power: 3682	Flames is normal and awesome!!! I had them with my s2000 and turbo back 3" exhaust on a N/A motor!!! freaking sweet sound and huge flames. what happens is the hot unburnt gas ignites when it reaches the significantly cooler air toward the end of your exhaust. I always joked with my buddies if they tailgated me at a red light I would melt their bumpers I have some pics of a Supra at lil tally that I took and it was throwing out 3ft flames!!! it was EPIC!!! __________________ *Shop Cars: 2013 318whp Nismo VspecII 370z SOLD, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054*

01-21-2011, 01:33 PM	#30 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	I want to shoot flames __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

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