Any idea what would cause a popcorn sound out of the exhaust pipe? Car runs fine other than that!

 

Rotaries run uniquely high exhaust temps. Putting popcorn in your exhaust will surely make popping sounds.

Perhaps someone was hungry and lacked a microwave?

I would check your exhaust for popcorn at once that could obstruct exhaust flow.

 

I don't know whether to laugh or smack you for being a smart ***! ☺

 

Both!

 

its caused by the fact rotary motors run quite rich the sound you are hearing is this extra fuel igniting in the exhaust. Typically called a back fire. With a free flow exhaust it would produce fireballs or flames.

 

I know what my first mod is gonna be!!!!

 

Fireballs attract the attention of undesirables like 5-0...and that generally isnt a good thing.

 

The loud exhaust note will do the same. Fireballs/flames can and should be kept to a minimum. Also with a free flow exhaust other problems will arise whether you are turbo or N/a. I know because i have both

 

I <3 free flowing exhausts. I've never had any problems with either turbo or n/a. The only problem I can see "arise" is better gas mileage and helping the engine breathe better.

 

+1^

**** cats..

 

If thats all it is (no cat).

I ran my 240SX with a gutted cat for 3 years..I made quite a few fire ***** my self.

 

With a turbo you will most likely hit fuel cut like i am now in my TII.


With an n/a if it is S4 your 6 ports will stop working.

 

Also, an exhaust leak or other introduction of oxygen into the exhaust will increase popping significantly.

 

i use my exaust to roast marshmallows. rotary smores are the best!!!!