backfires=off timing?
Thread Starter
Senior Member
Joined: Apr 2002
Posts: 514
Likes: 0
From: Deer Park, N.Y.
Car: 1983 z-28/SFC/bilsteins/adj.arms
Engine: 355sbc/Demon650dp/hedmanheaders/
Transmission: t-5, alum DS
Axle/Gears: 3.42 torsen posi, baer discs
backfires=off timing?
my 355/holley 3310/t-5 combo started backfiring from the tail pipe after i changed the PV to a higher 9.5. when i'm accelerating it's fine. but when i slow down in gear i can hear the tail rumble and then start popping. it never does this on acceleration or starting or any other phase...only on deceleration. is this timing? i'm running about 20* total....
Joined: Jun 2005
Posts: 1,245
Likes: 8
From: Fairfield, CA
Car: 91camaro rs,2014 silverado 5.3L
Engine: 5.7Lcarb,5.3L
Transmission: 700-r4, 6L80
Axle/Gears: strange 3.73's
Re: backfires=off timing?
20 total at what rpm? it should be about 30-34 at around 3000. what is your base timing?
Thread Starter
Senior Member
Joined: Apr 2002
Posts: 514
Likes: 0
From: Deer Park, N.Y.
Car: 1983 z-28/SFC/bilsteins/adj.arms
Engine: 355sbc/Demon650dp/hedmanheaders/
Transmission: t-5, alum DS
Axle/Gears: 3.42 torsen posi, baer discs
Re: backfires=off timing?
sorry, base was 20....i don't know total......is timing the cause?
Joined: Jun 2005
Posts: 1,245
Likes: 8
From: Fairfield, CA
Car: 91camaro rs,2014 silverado 5.3L
Engine: 5.7Lcarb,5.3L
Transmission: 700-r4, 6L80
Axle/Gears: strange 3.73's
Re: backfires=off timing?
are you running straight pipes? or does it have a muffler?
Thread Starter
Senior Member
Joined: Apr 2002
Posts: 514
Likes: 0
From: Deer Park, N.Y.
Car: 1983 z-28/SFC/bilsteins/adj.arms
Engine: 355sbc/Demon650dp/hedmanheaders/
Transmission: t-5, alum DS
Axle/Gears: 3.42 torsen posi, baer discs
Re: backfires=off timing?
shorty headers, hooker muffler and exhaust system...i'm gonna check the distributor connections...i took out the stock module 'cause it was interfering with the accel 300 box...the car pulls like crazy and idles nicely...no surges or spurts....it just pops and bubbles whenever i decelerate......
Member
Joined: Aug 2006
Posts: 234
Likes: 1
From: new york
Car: 89camaro rs
Engine: 350tbi (needs carb!)
Transmission: 700r4
Axle/Gears: 32x in process
Re: backfires=off timing?
i actually like the gurgling sound on declearation iuno i like to hear that remind me of old school hot rods
Thread
Thread Starter
Forum
Replies
Last Post
