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-   2nd Generation Specific (1986-1992) (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/)
-   -   Can N/A's Spit Flames? (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/can-n-spit-flames-359184/)

Louis M 10-17-04 06:51 PM

Can N/A's Spit Flames?
 
Just wondering if n/a's can spit flames... please no comments about why flames are gay or something like that...

Crashx7 10-17-04 06:53 PM

Yes.



<-----use it.

barcode 10-17-04 06:53 PM

Any car that runs rich and has no catalytic converter can. Flames come as a result of unburnt fuel in the exhaust manifold/exhaust system that is then ignited by combustion. You can't shoot flames with a cat because it finishes the burning process that the engine didn't complete and takes out the unburnt fuel that would be used flames.

Rotary_7 10-17-04 06:53 PM

i heard that if u get a full exaust (headers, d-pipe, catback..etc) it is possible to shoot flames....if u search, i think you can find a few videos clips on N/A splitting flames

Bob_The_Normal 10-17-04 06:57 PM

Running EXTREMELY rich, I have shot flames from N/A with a cat.

I've yet to find out the condition of the cat though... could very well be gone.

I'll find out when I get my engine together and take it to get smogged. :(

My TPS was going out and spiked a lot... so it would throw extra fuel in all the time.

EDIT:

Originally Posted by Kenteth
not this again...

rotfl...

--Gary

Kenteth 10-17-04 07:00 PM

not this again...

RXciting 10-17-04 07:14 PM

<-------see pick.. that's my 87 with exhaust

SonicRaT 10-17-04 07:21 PM

http://sonicrat.org/~rat/cars/rx7-3/flames2.jpg

FC_DRIFTER 10-17-04 07:34 PM

Does anyone have a step-by-step process to get it to do it?

casio 10-17-04 07:35 PM


Originally Posted by barcode
Any car that runs rich and has no catalytic converter can. Flames come as a result of unburnt fuel in the exhaust manifold/exhaust system that is then ignited by combustion. You can't shoot flames with a cat because it finishes the burning process that the engine didn't complete and takes out the unburnt fuel that would be used flames.

i believe the fuel is ignited by the heat of the exhaust. in which case, it would be "combusting" out the exhaust (fuel needs oxygen to burn). a cat doesnt finish the burning process. it has oxidation reduction and oxidation. it seperates the O (oxygen) from the other particles/elements and then reattaches O to the elements (H, C, N) producing CO2 (CO is the bad form), NOx and H2O (etc).
i have a cat and i still hear pops, even as low as 3000. running rich? probably. i have an safc and need it tuned. any catch? yes, my air pump isnt hooked up. i imagine the cat is stealing the O and letting the other elements ride through.

casio 10-17-04 07:37 PM


Originally Posted by FC_DRIFTER
Does anyone have a step-by-step process to get it to do it?

low compression motor. damaged sensors. purposely running rich, revving high, letting off. pretty much a lot of things that no one who cares about the performance of their car would do.
there's also ignition cut and anti-lag. you can also set up a haltech (etc) to dump fuel in between shifts to keep a turbo spooled.
you can also search as this has been covered more times than i've posted on this site. you may find a few threads where people get "flamed" for this topic. yes, the cheesy pun was intended.

satoacs 10-17-04 07:43 PM

some one up top, like 2 or 3 post said cars without catalytic converters can shoot flames....if you have downpipe, high-flow cat, cat bak, can it still shoot flames.
can a car that is running rich shoot flames with a cat?

Kenteth 10-17-04 07:44 PM


Originally Posted by SonicRaT

Damn interlaced video, I was hopin to see an asian in a bikini when I highlighted that pic :/ damn you

1RevvinFC3S 10-17-04 07:45 PM

^:rlaugh: I love puns. Oh, and I would imagine full catless exhaust would shoot flames that would make even F-18's green with envy.

Kenteth 10-17-04 07:46 PM


Originally Posted by satoacs
some one up top, like 2 or 3 post said cars without catalytic converters can shoot flames....if you have downpipe, high-flow cat, cat bak, can it still shoot flames.
can a car that is running rich shoot flames with a cat?

Cats kill flames. Basicaly they take the fuel that eventually lealds to fireballs at the exhaust exit and do their best to neutralize it by quickly oxidizing it. Not to mention running the car extra rich qill overbear the cat and evetually kill it out

casio 10-17-04 07:50 PM

if a car is running so improperly that it has a good working cat (meaning an air pump is in use) and still enough HCs to miserably fail an emissions test, than yes, i believe it should be able to shoot flames.
is anyone missing the term "improper"? i'm not saying that no rotary can shoot flames and not be in proper working order, but you dont want to run _that_ rich! it robs power, doesnt drive as well, and burns gas. if you are running that rich, fix the problem.

casio 10-17-04 07:52 PM


Originally Posted by Kenteth
Cats kill flames. Basicaly they take the fuel that eventually lealds to fireballs at the exhaust exit and do their best to neutralize it by quickly oxidizing it. Not to mention running the car extra rich qill overbear the cat and evetually kill it out

properly functioning cats with an air pump on a properly running car. their magic only goes so far. (trust me, i failed emissions ;))

Kenteth 10-17-04 07:58 PM


Originally Posted by casio
properly functioning cats with an air pump on a properly running car. their magic only goes so far. (trust me, i failed emissions ;))

Right, the air pump would have to be working to supply the fuel with oxygen and electrons to oxidize. If the cat is straight through, or burnt up, you could very well shoot flames because the fuel will no longer get oxidized, and will make it all the way to the exit, still ready to combust.

SonicRaT 10-17-04 10:17 PM


Originally Posted by Kenteth
Damn interlaced video, I was hopin to see an asian in a bikini when I highlighted that pic :/ damn you

Hahaha, yeah, shitty old ATI capture card! :D

torean 10-17-04 11:22 PM

so what would happen if i put my air pump back on and hook it up to my MP?.....

casio 10-17-04 11:29 PM

depends, do you have a cat? if so, the cat, if 3 way, would take most of the air and strip it of its Oxygen, then not having O to reattach to the other elements. if you have a cat, like those i believe used on Trans Ams (i dont know what theyre called), then thats how that cat works. the air isnt pumped into the cat, but before it. if there's no cat and youre just giving the fuel air sooner, then i guess flames could be made in your exhaust before reaching the outside air. i'm not too sure, though.

Kenteth 10-18-04 12:31 AM


Originally Posted by casio
depends, do you have a cat? if so, the cat, if 3 way, would take most of the air and strip it of its Oxygen, then not having O to reattach to the other elements. if you have a cat, like those i believe used on Trans Ams (i dont know what theyre called), then thats how that cat works. the air isnt pumped into the cat, but before it. if there's no cat and youre just giving the fuel air sooner, then i guess flames could be made in your exhaust before reaching the outside air. i'm not too sure, though.

I'm wondering if the air pump could pump a significant amount of o2 into the exhaust to actually provide that combustion in the exhaust... I think it would probably be less of a fireball at the exit, and it would end up raising exhaust temps in the pipes. Not sure though...

torean 10-18-04 12:34 AM

maybe it'll damage the turbo as well....shocking the turbine

casio 10-18-04 12:39 AM

it would be well after the turbo.

Redline7 10-18-04 01:01 AM

I have in my 86 NA, actually I get after fires all the time just far enough up the pipe that I dont get falames. I've been told though that if you're directly behind my car at night you can see a small flash in the mufflers. But some times I get good flames. If i run my car very hard and get the exhaust warm enough, I will sometimes get a bright flash out back when I lift off to shift. But I have never seen the flame myself. Oh I also have a straight (no cat) 3" to 2.5" exhaust exiting out 2.5" stright through mufflers lol.


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