Flames out the exhaust

G2K · 12-28-2018, 02:11 PM

So, I'm no ricer boy but I've been wondering why is it that these cars don't shoot any flames out the exhaust when lets say its an FBO e85 car....

Lets take as an example Corvettes.... Every time i see videos online of vettes they shoot flames out.... I'm NOT referring to the 2-step flames.... but like the back fire flames when you let off gas or when your shifting in between gears....

I've had many cars in all different power levels shooting flames even in 250hp cars.... ofcourse this specific car was a turbo 4cyl which is easier but you get the idea. I'm not even talking about like 3ft flames but you know something.... a spark... i just think when you are gunning it passing that guy and he looks as you pull away and let go.... that little puff just hit em where it hurts even more.

A FBO e85 Camaro puts down 475-490HP to the wheels. I believe it has more than enough power to do this... is it the way the exhaust is that doesn't allow this???

Heck, I have a friend with a 1,000+ HP 6th gen with build motor and even he doesn't shoot any flames.....

Anyone else wonder?

TRich2SS · 12-28-2018, 02:34 PM

Without flames, winning isn't really winning. Now all there is to do is wait for super technical breakdowns of which I will only understand 10% of.

6spdhyperblue · 12-28-2018, 04:49 PM

Is it power related or excessive fuel in hot pipes.

JCunningham · 12-29-2018, 12:12 AM

im just guessing but i think its because the car shuts off the fuel when you take your foot off the gas. The fuel shut off can be turned off with a tune

Silverado57 · 12-29-2018, 05:25 AM

I have an old 8HP push leaf blower that flames out the exhaust when it's shut down. I never considered that to be a positive attribute.

CompleteStreet · 12-30-2018, 01:30 PM

Never seen flames shoot out the exhaust lol!

Joey Soul · 01-01-2019, 06:16 PM

Ive been messing with hptuners trying for the same thing. Nonluck, everything is predetermined and managed by tq and fuel. The 5th gen actually have spark cut options and can keep fuel flowing. Really isnt much room to have fun with this ecu

oldman · 01-01-2019, 06:40 PM

turbo rices have flames out the back at shift because stock they use a diverter (recycling) valve after the MAF, so the air is already measured and stays in the intake tract post MAF.

They then toss in a BOV to replace the stock diverter, a BOV dumps the premeasured air and this causes the air / fuel to go BUKU rich and walla flames ala ricer. Now there are reasons why high boost cars go to BOVs, but for the most part this is a ricer mod.

Chef-j · 01-01-2019, 06:40 PM

Quote:

Originally Posted by CompleteStreet

Never seen flames shoot out the exhaust lol!

cmitchell17 · 01-01-2019, 06:51 PM

Quote:

Originally Posted by Joey Soul

Ive been messing with hptuners trying for the same thing. Nonluck, everything is predetermined and managed by tq and fuel. The 5th gen actually have spark cut options and can keep fuel flowing. Really isnt much room to have fun with this ecu

I haven't been able to figure out the torque based gen V fueling control either. I've tried looking at the patents, but the way patents are written is just to overly complicate it so it dosent reveal any info. Its kind of like the chicken and egg thing, there is a lookup table for accelerator position vs demanded torque, but then there are tables that are referenced from torque. The best assumption I can make is that the ECU controls the engine with the demanded torque value during certain situations, transmission shift request, torque management, etc.

Joey Soul · 01-02-2019, 01:17 PM

Quote:

Originally Posted by cmitchell17

I haven't been able to figure out the torque based gen V fueling control either. I've tried looking at the patents, but the way patents are written is just to overly complicate it so it dosent reveal any info. Its kind of like the chicken and egg thing, there is a lookup table for accelerator position vs demanded torque, but then there are tables that are referenced from torque. The best assumption I can make is that the ECU controls the engine with the demanded torque value during certain situations, transmission shift request, torque management, etc.

Yea ive gotten a few pops and crackles but for the most part we don't have enough tables to control closed throttle fueling or spark limiting. The way they control the engine with predicted torque is quite annoying.

BradfordCamaro · 01-02-2019, 03:50 PM

Would love to drop the back end and drag it to throw sparks just like a 6-4 Impala

Est98SS · 01-02-2019, 10:23 PM

Mine shoots flames from no lift shifts pretty often. I’ve just got long tubes+mbrp catback and a procharger

lokitwitch04 · 01-03-2019, 08:58 AM

Ive wanted my car to do this too. Ive seen it on a few C7's, so it has to be possible.

12-28-2018, 02:11 PM	#1
G2K @Blackmamba_1LE Drives: 2017 1LE Join Date: Jun 2017 Location: South Florida Posts: 740	Flames out the exhaust So, I'm no ricer boy but I've been wondering why is it that these cars don't shoot any flames out the exhaust when lets say its an FBO e85 car.... Lets take as an example Corvettes.... Every time i see videos online of vettes they shoot flames out.... I'm NOT referring to the 2-step flames.... but like the back fire flames when you let off gas or when your shifting in between gears.... I've had many cars in all different power levels shooting flames even in 250hp cars.... ofcourse this specific car was a turbo 4cyl which is easier but you get the idea. I'm not even talking about like 3ft flames but you know something.... a spark... i just think when you are gunning it passing that guy and he looks as you pull away and let go.... that little puff just hit em where it hurts even more. A FBO e85 Camaro puts down 475-490HP to the wheels. I believe it has more than enough power to do this... is it the way the exhaust is that doesn't allow this??? Heck, I have a friend with a 1,000+ HP 6th gen with build motor and even he doesn't shoot any flames..... Anyone else wonder? __________________ OG: Pray Perf FBO ET:11.5 @119 THEN:LT4 SC, E85 + Meth :10.6 @135 NOW: H/C Whipple 416ci

12-28-2018, 04:49 PM	#3
6spdhyperblue Drives: 6th gen Join Date: Aug 2013 Location: US Posts: 3,678	Is it power related or excessive fuel in hot pipes. __________________ ‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122 ‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold)

12-29-2018, 12:12 AM	#4
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,070	im just guessing but i think its because the car shuts off the fuel when you take your foot off the gas. The fuel shut off can be turned off with a tune __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

12-29-2018, 05:25 AM	#5
Silverado57 Drives: 2017 Camaro SS Join Date: Nov 2018 Location: East Tennessee Posts: 522	I have an old 8HP push leaf blower that flames out the exhaust when it's shut down. I never considered that to be a positive attribute. __________________ Kevin Luceo Non Uro

01-01-2019, 06:16 PM	#7
Joey Soul The Mechanic Drives: 1SS M Join Date: Dec 2017 Location: NJ Posts: 291	Ive been messing with hptuners trying for the same thing. Nonluck, everything is predetermined and managed by tq and fuel. The 5th gen actually have spark cut options and can keep fuel flowing. Really isnt much room to have fun with this ecu __________________ BTR 225 w/CNC Heads\|JLT intake\|Speed Engineering 1"7/8 long tube and mid pipe\|LT2 manifold w/95mmTb\|Self tuned w/HPtuners\|Silvers 2Way coilovers\|Hotchkis front sway\|Advan AD08R\|BMR solid cradle bushings\|Recaro SR7\| Work ZR10 19"

12-28-2018, 02:34 PM	#2
TRich2SS Drives: 2016 Camaro 2SS Summit White Join Date: May 2016 Location: Maryland Posts: 260	Without flames, winning isn't really winning. Now all there is to do is wait for super technical breakdowns of which I will only understand 10% of.

12-30-2018, 01:30 PM	#6
CompleteStreet Drives: 2018 Camaro ZL1 A10 Join Date: Nov 2018 Location: West Chester, PA Posts: 462	Never seen flames shoot out the exhaust lol!

01-01-2019, 06:40 PM	#8
oldman Drives: SS 6 speed of course Join Date: Jan 2016 Location: Hilo, HI Posts: 4,324	turbo rices have flames out the back at shift because stock they use a diverter (recycling) valve after the MAF, so the air is already measured and stays in the intake tract post MAF. They then toss in a BOV to replace the stock diverter, a BOV dumps the premeasured air and this causes the air / fuel to go BUKU rich and walla flames ala ricer. Now there are reasons why high boost cars go to BOVs, but for the most part this is a ricer mod. __________________ Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.

01-02-2019, 03:50 PM	#12
BradfordCamaro SABIO Drives: 2016 CAMARO 1SS Join Date: Jul 2015 Location: Bradford, ON Posts: 5,012	Would love to drop the back end and drag it to throw sparks just like a 6-4 Impala __________________

01-02-2019, 10:23 PM	#13
Est98SS Drives: 2016 Camaro 2SS M6 Join Date: Nov 2016 Location: Bay Area Posts: 153	Mine shoots flames from no lift shifts pretty often. I’ve just got long tubes+mbrp catback and a procharger Attached Images

01-03-2019, 08:58 AM	#14
lokitwitch04 Drives: 2017 Camaro SS 2SS Join Date: Jun 2017 Location: Hamilton, MI Posts: 191	Ive wanted my car to do this too. Ive seen it on a few C7's, so it has to be possible.

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