Technical Help 350 chevy popping in exhaust

Ok so I have a el camino with a 350 2 bbl carb HEI dist and I have recently put on new headers and true duals on it and it has a popping from the exhaust. I have messed with the carb a little and the popping didn't really go away it got better but didn't go away

 

Do you have room to install a balance tube in your exhaust ?

 

I'd bet you have an exhaust leak.
I'd double down if popping showed up right after your new headers went on.

 

Yes I do have room for one

 

It doesent sound like it has and leak at all the exhaust leaked really bad before with the original single exhaust

 

Oh I'm sorry enlighten me on the rules where can I find the rules at p.s. I'm 16 and don't have a mullet

 

TRADIONAL (PRE 1965) HOT RODS AND CUSTOMS. We live in the past here. Ryan's time machine had only one setting and we all hopped in. Johnsons in the White House and our boys are fighting on foreign soil. The Mustang looks okay, but we're holding out. The Beatle's are good, but we won't admit it. The Beaach Boys ROCK. CUT YOUR HAIR!

 

I think he meant 1965, with a 350 that was put in later. Go with it Archer... let's slide some slack, at least its not an blazer 4x4 chassis conversion, or is it??

 

Ok so if it didn't pop before with stock exhaust how could valve springs be a problem

 

No it seams to have as much power as it should

 

Make sure you don't have plug wires 5 and 7 crossed.

 

But I guess I didn't get as much increased performance as I hoped for

 

I'll try the spark plug wires because i did have to remove all wires and plugs to get the headers in

 

my money is on the wires..18436572. but we all know that.
i prefer to start with rotor pointing at #1 cylinder,tdc.
good luck

 

Maybe a loose plug...

 

Vacuum hose off somewhere!

 

.. lest us not forget the Marlboro cigarette jacket and HD sticker on the back window.

 

Is it popping when you let off of the gas ( deceleration) ? If so like Vicky stated I'm betting its an exhaust leak.

 

Are you using Champion Spark plugs? HRP

 

I'm using standard AC delco plugs and yes it mostly back fireds when you let off the gas but it also does it some times when your sill in the gas

 

Lots of things to look at, as 31Vicky said exhaust leak, also the 5 and 7 plug wire crossed is something to watch for, I have been at this nearly 45 years and still cross them on occasion. Look for a loose wire in your ignition circuit as well, maybe coming off the switch or where is connects to the distributer, a momentary laps in zot to the dizzy will cause a back fire.

I don't care if you need a hair cut or not by the way, be yourself first and let the chips fall where they may.

 

Could the carb be off? Sounds to me like maybe it's not getting enough gas

 

5 and 7 wires are correct

 

It sounds to me that you need to richen the fuel mix to compensate for the more efficient exhaust system (lean mis fire some call that). You might also advance the timing a hair and see what that does just for kicks

 

That's exactly what I thought

 

Let us know what you find out. Part of the reason we all help is to learn. That's hard to do when the person doesn't report back just "what" fixed the problem.

 

I fixed it the carb was way way lean now it doesn't back fire hardly at all .

 

COOL! THX