backfire

two89w · #1 (**permalink**) 04-14-2002, 04:55 AM

i have a 347 with quad 44 mm idf webers, comp cams 294s, dart snr's, 10.1 comp,1 3/4 headers, it hasnt been tuned yet but its backfiring out the exhaust and the carbies what could/would the problems be??
i have had it on the dyno for a power run it made 295rwhp/5700rpm and 355ftlbs torque,it started to lean out and ping,does anybody think that the 295rwhp figure is a bit ordinary(low)for such a combination?or am i expecting to much?

SCOBRAC · #2 (**permalink**) 04-14-2002, 09:05 AM

Re-check.. Triple check if needed the plug wires to the firing sequence... you likely have it backwards... the rotor turns clockwise.. OR DOES IT?

scratch · #3 (**permalink**) 04-14-2002, 12:59 PM

Two89W
My backfires are caused by small exhaust leaks where my headers connect to my sidepipes...I am going to use muffler goo when I am ready to remove them to paint the car.

scratch

SCOBRAC · #4 (**permalink**) 04-14-2002, 06:40 PM

I like those Scratch and have no intention of fixing them...

scratch · #5 (**permalink**) 04-15-2002, 10:00 PM

Scrobrac:

I used to think an occasional backfire sounded cool, until I heard professional "tuners" at Willowsprings Raceway state that it points out who has not set up their car properly...

scratch