speedracer

when i drive my car, adn i shift occasionally , i hear a backfire.........no turbo...dx no cannister, or cat

imported_eth0r

hollowed cat or test pipe?

imported_BoOsTd

sounds like your cat is blown through/(or you dont have one if thats what u ment) If its not a loud backfire, its cuz the cats gone...the muffler and resonators should take care of most of it tho...

Rice Burner

you prob. running lean

imported_JookSingKid

could be a misfire... a bad plug or wire

imported_Syphon

No cat? Can you pass emmissions without one?

Biggy

no u cant pass emmissions without one, its like a 300-400 fine if ur caught without one to fkn expensive, its good to have a cat tho cause without one ur gonna have like no backpressure, with a small engine u need backpressure.

mourad

Why do you need backpressure with a smaller engine? (or any engine for that matter).

imported_gatherer

Back pressure helps with the low end torque... not sure why but it does...I'd love to know why myself....

blk93si

i have a test pipe

imported_echien

It sounds cool though, like when WRC rally cars shift.

EL_CIVIC

mee too..hahah... gained so much top end with it....
but lost so much low end....that's why i got the mugen twin loop ... gave me back the low end...with top end...and best of all....no NOISE.. hahah..

mourad

I hear the Mugen twin is the mac daddy of all rear end exhausts, is that true? How much does it run fo? Where to pickup?

mechatune

REAL moogen twin loop? also, what size piping u using?

MonoDJ123

I have the same sound when I shift at high rpm. It sounds cool when your rippin on the car and after you shift into 3rd and bam. It didn't do that till I installed the hi-flow cat and mandrel bent piping.

EL_CIVIC

i actually get flames coming out of my exhuast..lol..i dont noe why...is this good or bad?

imported_BoOsTd

ahahaha^^^ this is cool, since everyone wishes they were in 2fast2furious.... (sarcasam)

B_JAI

can some one explain to me running rich or running lean?
what 's good and what's bad?

Middlemiss

iTrader: (2)

BAD: Running rich is using to much gas , engine doesnt run right, and can puff black smoke. Running lean is not good either, it can cause detenation (blow a hole in a piston NOT GOOD) .

Good: The good is running perfect - right in the middle of lean and rich. You can tell by looking at your sparkplugs.. Usually they should be a nice browny/gray kind of color but if they are black, or white there could be issues!


Thanks
Joe