Re: Phantom fluttering
 

I'd have to check for sure, but if I remember right it's at the factory setting(4 degrees BTDC?).

Re: Phantom fluttering
 

Yes it is gone until I start cruising again. Another thing I noticed today is that it happens at lower cruise speeds also. It seems to happen whenever the throttle is held at a steady speed.

Re: Phantom fluttering
 

Bump your timing to 14 initial and I'd bet your 'fluttering' goes away.

Re: Phantom fluttering
 

yes geezer is right more timing advance will really wake that engine up mr geezer sir would the advanced timing help burn a lean mix more completely?

Re: Phantom fluttering
 

I was onthe phone with edelbrock (the co not the man)tech guy said the 1406 is calibrated for fuel economy it does not run well at sea level we both live close to sea level i think yes that was a long time ago but my memory isnt that bad (i hope)

Re: Phantom fluttering
 

due to my limited experience compared to geezer and the fact that i dont know your ignition timing I would start at a lower number.I also holed a piston once on sweet smooth running sbc. sae certified mechanic timed it never again

Re: Phantom fluttering
 

Ok so I have experienced this a few times , and you are describing it fairly well as a flutter , at steady speeds , I have a question though, when you go up a road that has a increased up hill grade at a steady speed does the flutter seem more pronounced or less felt as you drive up a road that has a up hill grade.

Re: Phantom fluttering
 

In the mid eighties i worked in a motorcycle dealership due to epa the bikes ran lean they would say it was hunting surging running out of gas i think fluttering would describe it. It only shows up in cruise mode just trying to help good luck

Re: Phantom fluttering
 

when i was a clueless kid now im a clueless old guy geezer is nodding his head took my charger to a shop the old mechanic said it was dithering. it was my vac advance.

Re: Phantom fluttering
 

I'm away from home right now, but when I get home I'll adjust the timing.
So you're saying 14 deg BTDC, right? It's been a long time since I last checked my timing, so this quite possibly is the problem. Hope

Re: Phantom fluttering
 

I humbly suggest setting timing first its always a good idea to make one change at a time

Re: Phantom fluttering
 

Yupper!!
Be conservative if you like. Better to err on the low side. Try 10 to start. Bump it a to 12 if it starts nice. Your idle will increase a bit. Just turn it back down on the curb idle screw. And you'll likely need to adjust your mixture screws a bit too.
Don't forget to plug off the vac advance hose to the vac pot when you adjust your timing.

Re: Phantom fluttering
 

right on geezer where should he plug his vacuum line? full manifold ?he asked about it earlier. when he hits the gas hes gonna love it!