help po!! backfire!!!

**hilldweller** · July 7th, 2009 10:55 AM

Freeflow muffler = backfire, malakas sa gas by 15%, bawas low end power.
Baka may singaw ang exhaust pipe at lean ang a/f mixture. Manotice mo yan kung lean ang mixture, mas malakas ang hangin na lumalabas sa exhaust pipe kaysa kung rich a/f mixture mo.

**chielout** · July 7th, 2009 02:43 PM

thank you ser niky....

ser pano malalaman pag may butas ang exhaust pipe? d ko po lam kung free flow ung muff ko eh...RSR po...jasma po ata...ano po ba yung free flow?

**niky** · July 7th, 2009 07:34 PM

If you can look through the muffler and see the exhaust pipe on the other side, that's straight through.

Most performance mufflers have a straight pipe inside, surrounded by sound insulation. Stock mufflers, on the other hand, look like rat mazes, with walls (baffles) that redirect the exhaust and reflect the sound around inside the body (can).