Pulling V.A at idle
Do ya check that w/ a drill bit?
Transfer slots? Yes.
Holley Jet size
I checked the idle airs... 3.5 turns out ( a buddy "helped" do that when i went to the store)
3310 doesn't have adj idle air bleeds. Stick some wires in them. And I've had to do that with 3310 when adding bypass air - in my case by drilling the primary throttle plates.
So, when I set the timing ( Vac Advance disconnected, plugged hose) it was close to where it was supposed to be...
????
BUT, plugs were ugly, pig rich, ( pulled em and posted em here, different post)
Cant find but I'll take your word for it.
Anyway, when I hooked up the VA, the idle snapped back to "life"! Sounded Way Tight, like it should! Question is : Why am I pulling Vac advance off Ported Vac?
Primary throttles are too far open.
See posts here.
Holley Jet size
She's cranked up to 18° ....
At what rpm????
I wanna say that was 12° BTC...w/ points.
Again, at what rpm????
This is critical.
The mechanical advance can come in real fast on many factory distributors.
One Distributor had a soild line at 2500 or above... mill is a 340, ported J heads, biggest valves you can shove in em, .484 MP cam, Strip Dom, 155 psi w/ forged stock bore TRWS...wanna say she's pulling 9hg.
I've run a similar 340.
9 in in neutral is weak but not surprising. You can get it a little better so it will be at least 9 in D when warmed up.
Its going to take some time and trials to tune it in.
Get the notebook and set the throttles. Set fuel level. Let in a little more air, You can crack the secondaries but take notes on how many turns on that little screw so you can go back to factory. Then start making changes - one at a time and readjust the mix screws. Test in gear. Idle in N is not important, In gear is what counts.
IMO it will want between 17-19* BTDC initial. The problem is you may not be able to measure true initial because at this stage in the tuning the slowest idle you may be able to get is 1000 rpm or so.
If that's the case, then try 20 or 21*
at 1000 rpm. Whatever timing change you make after that, always get a measurement at 1000 (or whatever your baseline was). That way you have at least one consistant reference rpm.
