Exhaust Pops and Flame with Cat or No-Cat?

[TheBigPhantom]

I was wondering if anyone on here knew if the exhaust would pop more and produce flames or fireballs (backfire) without a catalytic converter or if it would more likely occur in a car with a cat.

I drive a 95 GSX so use that as a foundation when talking about how to produce this effect.

 

[crimsonGST]

All i know is i have been having that same problem and was told my cat was fried and to slap a straight pipe there. Problem is once i got it on the lift, there was no cat already...So i second this question. hahaha.

 

[Boost92awd]

Yes it will pop more and shoot flames easier without a cat. The cat is part of emissions but it also acts as a muffler.

 

[crimsonGST]

Doesn't sound to healthy for my car...

 

[Boost92awd]

You have other problems, as seen in your thread.

 

[ShawnsGarage]

I drive a 95 GSX so use that as a foundation when talking about how to produce this effect.

Is this a problem you are having or are you trying to get you car to do this?

 

[Yngvar]

I think he wants to shot fire balls

 

[ShawnsGarage]

Roman Candles

 

[fatherbubble]

The way I was told to get the flame effect is to. Take the cat off an get dsmlink an turn on the antilag control on it. I read that if you set it up right you can shoot fire out your exaust like that. The down side is it also kills your turbo. Another way is use nitrous a 50 shot will do from what I read. My question is why owuld you want to be a ricer? Or do you just want to try it out one time an see? I think it would be cool to see, but not do all the time. FaF is fun to watch but you get more chicks from power than looks.

 

[crimsonGST]

You have other problems, as seen in your thread.

all of those problems have been fixed, including a boost leak test. i had a loose coupling, but its still shootin' flames buddy. I was told it was the cat after all of that, and um...no cat?

 

[_Madman_]

Vented BOV... The ECU thinks that air is there, it's not, you got fuel in your pipes and BOOM.

With correct air fuel ratio you can explode your pipes, mufflers, turbo and exhaust manifold. I've seen aftermath of in pipe explosion myself, it's neither pretty, nor cheap.

And pray your half empty fuel tank is not in a way

 

[crimsonGST]

Are you telling me im gonna explodeWTF. Hahaha. I have a Greddy RS, has that ever happened with that BOV before?

 

[_Madman_]

Maybe not, but maybe it will if you have badly tuned engine. I can't find pictures of such explosion aftermath on our local dsm portal

RS can be recirculated as it should be. I have one, you just need an adapter. And with good filter like Apex'i it sounds almost like vented.

 

[crimsonGST]

Hmm...well apparently to answer the OP's question, there seems to be a variety of things that can cause this.

To start a little list i've gotten,

1. bad cat.
2. Vented BOV.
3. Turbo bearings gone bad?
4. Compression.
5. bad plugs/wires.
and last but still my fave.
6. 87 octane gas. (X

 

[gob4sho89]

Like This???? (this is me in my car btw shooting the flames on our way back from the shootout.....YouTube - Chad shooting flames)
I solved it by fixing a leak in my exhaust. My o2housing was being held on with one loose bolt and there was no gasket. I run my wastegate off of the o2 housing, so this really messed with my tune. I fixed the leak with a new gasket and 4 new bolts, and no more flames. It was f-ing sweet though, the look on peoples faces...

 

[TheBigPhantom]

Well I its was more of an I want to make my car be able to do this once in a while.

I already no the stutter box on the DSM chips and DSM link can do this but I've seen it happen on SRT-4's when they are engine breaking or shifting.

ALSO i thought that it would happend more often in a car WITH a cat because the cat burns the fuel making an explosion?

 

[crimsonGST]

mine was VERY similar to this, did your car maybe seem to have a major power loss just before, like as you press the gas to the floor?

 

[BoredDSM]

I've heard that if you block of the EGR and use a studderbox it would sometimes shoot flames but thats only what i have heard. Only way I know of how to shoot flames is use an ALS system like the above poster stated.

 

[LandoAWD]

3. Don't try to help if you don't know the answer - bad advice is often worse than no advice (no "I think" or "I guess" or "I've heard").

 

[91gsx20g]

YES! mine shoots flames and holds a flame when i let off and engine brake...and now right as it done shooting it skips for a sec???