Can Back"fire" hurt your engine? [Archive] - GrandAmGT.com Forum

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zukiracer19
11-21-2010, 03:42 PM
If I mash it and it shifts into 2nd i get a huge ass fireball that shoots out the bottom of my car, or if i would manually downshift for ****s and gigs to hear the nice popping and fireballs will pop at the top of the rpm. but A/F can read 14:6ish. This isnt hurting anything correct?

rocketfast123
11-21-2010, 04:18 PM
I just know it ****s up O2s and cats. But i take it your running open headers?

zukiracer19
11-21-2010, 04:20 PM
i just run open cutout like 90% of the time lol

boost21
11-21-2010, 05:10 PM
If you are running that a/f under boost you are way too lean and going to eventually blow your motor.

zukiracer19
11-21-2010, 05:58 PM
I meant on manual downshifts not WOT. Shifting yes my a/f is in 11.2-11.6 range

[ChaosweaveR]
11-21-2010, 06:15 PM
I meant on manual downshifts not WOT. Shifting yes my a/f is in 11.2-11.6 range

Yeah, your transmission must focking LOVE you.

Malaclypse
11-21-2010, 07:03 PM
Backfires won't hurt anything... your trans doesn't like you though.

Downshifting like that should only be done on a manual or when its absolutely necessary to slow the car down.

rocketfast123
11-21-2010, 10:52 PM
Just watch out where the fire balls is going. Your car is skeeting for a DD 3400. I would look into a single pipe setup. The GA does not have any hangers in the center.


After the header it's all straight pipe to the muffler. That gave me problems in my last 4 years of owning a stock GA. Y'all don't want to know my nigga tricks. (((look at my profile)))


And i just been drinkin'