Talek

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.

13B2QuIcKNy

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

Ouijan

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.

Talek

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

GsrSol

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

B0oost

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

Ouijan

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

zooq

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

ttpowerd

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

jd93rx7

What do you mean by running rich?

martini

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.

B0oost

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

Talek

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