An alternative is to have the engine cut spark at the rev-limit instead of cutting fuel. This makes unburnt mixture go out the exhaust which should be enough to shoot flames but is better than leaning out inside the engine. Either way is bad though, leaning out the engine is obvioiusly bad, but flames out the exhaust will seriously cut down the lifespan of your hard-earned exhaust system! Shooting flames actually should be easier with the rear cat on. Basically if you still have the rear cat on your car, you see the little inlet tube? That does the same thing as using bellows to make the fire bigger in a fireplace, except it's doing that in your cat to burn up any unused fuel. Cats on carbied cars look the same too. When an _extra_ rich mixture comes down the pipe, your rear cat will ignite it, sending flames out the back but not without doing a little damage to your rear cat and catback system first! Extra rich mixture isn't too good for the front cat either. If you do this on cars with OBD-II (which doesn't include FDs I think), then you also have a second oxygen sensor in the flame's path so you can say goodbye to that as well.



Short answer: Yes, you can with cats on, should actually be easier with at least the rear one since it will stoke the fire. No it's not recommended unless you don't mind blowing $$$ on new cats and catbacks over and over.

1 part ported motor, 3 parts open exhaust = BIG ASS FLAMES! https://www.nopistons.com/forums/pub...IR#>/boink.gif



My car shoots big ass flames.

Just floor it and bounce it off the rev limiter, gets the big flame jonx everytime https://www.nopistons.com/forums/pub...IR#>/smile.png

What type of tips allow flames to shoot? I have a full open exhaust (dp/mp/rb-dt-cb) with Power FC set to 8000 rpm for fuel cut (basically will NOT cut fuel). I still don't know if I'm shooting flames; I'm afraid the Racing Beat dual tip won't allow such quality flammage?

I've seen it done out of Dual Tip Apexi N1's. https://www.nopistons.com/forums/pub...IR#>/boink.gif

I wonder if the internal baffles in the RB dual choke out some of the flameage.

Yeh Fast Freddy did it two months ago to his brother's 2Nd gen.

Interupted spark signal.....blows unburnt fuel into pipe, there he has a spark plug welded and grounded at the end which lights it up.



Its ******* MAD I tell you!



At night at the lights you can scare the **** out of people with the 5 ft flame not

to mention the loud boom. I piss on myself every time!

People dump drinks and ****. Then they look at you crazy.



Hot dogs, smores......anyone? Meet at Main St. and 5th.



HA,ha,ha,,aaaaaaaaaaaaaaa,ha,ha,ha



he may have picks of the install

Yup, I've done it out of Ni dual and PFS catbacks.

Flames = attention.



I'll need NO more of that thanks! lol



https://www.nopistons.com/forums/pub...#>/biggrin.png

9BASE3 Posted on Nov 19 2003, 03:54 PM



Flames = attention.



I'll need NO more of that thanks! lol



yep

I have a single turbo with a PFC tuned rich and all i can say is ask freeman about my flamage. Oh i have no emssions bullshit and i have a stright exhaust with a greddy muffler. big 4.5 inch tip. Lights em up good. Ask about the mustang. https://www.nopistons.com/forums/pub...1047683517.gif