Ok lets start with the basics I have a 87 N/A with a rebuilt Engine 10,000 miles and straight pipes well it has a pre silencer that does nothing. Ever since I have had the straight pipes when I shift at high Rev it will either backfire or throw a flame out each side about 1-2 feet or it will just throw a flame. I don’t know if this is really messing my car up or what someone please give me advice on what they think it is or if this is just normal.

 

Nothings wrong...You have an RX-7. Welcome to the club. Now learn to use the search button

 

Assuming your idle speed is OK, that's normal. If it bothers you, it can be adjusted out.

 

no i like it but i just didnt want anything to happen to my car because i have a lot of time and money put into it. I didnt think it was harming the engine but i just wanted to be 100% sure

 

No harm in flames, though, check your timing and make sure it's not retarded at all.

 

hmmmm... my timing is alread 1cm advanced and it still backfires and fart

 

That could be something else, such as a screwy TPS or even AFM.

 

Perfectly normal. Exhaust leaks can cause the same problem. Flames rock though.... Hehe tailgaters can F.uck off for sure!!!!!I believe its caused by lack of back pressure.

 

its caused my extra fuel left over and 2300F exhaust yeah rotary

 

now if you want more flames d/c your tps and remove your dashpot

 

Flames kick! Mine shoots em six feet. Gotta be careful at night, the cops get upset because their cuisers don't shoot flames.

 

"now if you want more flames d/c your tps and remove your dashpot"
what is d/c?

 

disconnect