Hey guys, I'm new to the forum... I just picked up a 1994 RX-7 touring and have a couple questions about it. It has a modified exhaust system, aftermarket downpipe, midpipe, and catback exhaust. I'm in Iowa, luckily, so not having a catalytic converter isn't illegal. Anyway, I was up around 6k rpms in 3rd gear when I saw a cop a ways up so had to drop off the gas fast. As soon as I let up, I heard a single backfire. I've owned turbocharged cars before, but never an rx7, and haven't had modded exhaust before. Is some amount of backfiring normal? Everything else seems to be running fine.

 

PERFECTLY NORMAL.. OUR CARS TEND TO RUN A LITTLE RICH THATS WHY IT CAUSES THAT...

 

Yeah, backfiring is pretty common. I have a DP and cat back and I get backfiring often. As long as it doesn't annoy you or the cop that is following you, don't worry, it doesnt really do any damage. Actually, with your setup, you may be shooting flames out your ****.

Welcome to the world of rotaries, where backfiring and exhaust flames are commonplace.

 

Hah, flames out the exhaust? Badass!
God I love this friggin car.

 

Yours is normal. However I just started to get backfiring at idle and while just crusing, not good.

 

flame are nice
so u need down and mid pip and then exhaust, ight i got it now

 

Have someone follow you at dusk/night and go through a couple of cycle of WOT to full motor decel. The observer may be able to see some flames.

If you dont have any and really, really, really want flames, some people have rigged a spark plug (which requires a high power current) in the exhaust pipe and connected this circuit to a switch in the cockpit. Voila, instant flammage at the flip of a switch

 

all you have to do is just rev it to 8k and let off. i use it sometimes to scare people that tail gate.

 

you need a dp, mp, and a straight through cb like apexi n1 single, blitz nur spec, HKS and others.

 

What do you mean by running rich?

 

Just because you don't have to submit to emissions testing doesn't mean it's not illegal.

It is a FEDERAL offense to remove your catalytic converter. If caught (by local, county or state police), you could be fined $20,000.

 

all the fuel isnt burnt so the gas run rich wit oil/gas/air
mixture

 

Uh oh, I better take it easy around the police then