What is more likely to cause popping on Decel, retarded or advanced timing?
Thread Starter
Supreme Member
Joined: Jan 2000
Posts: 1,123
Likes: 0
From: jeff NY usa
Car: 86 Z28
Engine: 350
Transmission: W/C T-5
Axle/Gears: 9 BOLT 3.45 POSI
What is more likely to cause popping on Decel, retarded or advanced timing?
I am chasing a rumble/pop in the exhaust on decel, would either advanced or retarded timing on decel cause this cond? the only thing that seems to stop it was with the old computer controlled q jet and hei was when I unplug the 4 pin connector that you unplugged to adjust timing, if i left it un hooked it would not pop but also didn't run right power wise.
I now have a holley 650 dp and MSD Dist, it still does it but not as loud.
I now have a holley 650 dp and MSD Dist, it still does it but not as loud.
Junior Member
Joined: Jan 2010
Posts: 4
Likes: 0
Re: What is more likely to cause popping on Decel, retarded or advanced timing?
Leaks in the exhaust system tend to be the biggest problem. On decel it allows fresh air to enter and cause the rich mixture to explode.
Thread Starter
Supreme Member
Joined: Jan 2000
Posts: 1,123
Likes: 0
From: jeff NY usa
Car: 86 Z28
Engine: 350
Transmission: W/C T-5
Axle/Gears: 9 BOLT 3.45 POSI
Re: What is more likely to cause popping on Decel, retarded or advanced timing?
Exhaust is sealed tight, I used a Smoke machine to check this.
Thread
Thread Starter
Forum
Replies
Last Post
CarGuyDennis
Organized Drag Racing and Autocross
137
Dec 6, 2016 11:02 PM
