Vacuum advanced

[74 DART SWINGER]

Hey fellas
Iv heard many things about having the advanced line hooked up to the passenger side or drivers side of the carb(edelbrock for example).Right now I have it hooked up on the drivers side on my eddy 600cfm.Will it be fine if I run it like this?
Thanks

[moparmussel]

i have mine on pass side and it runs the balls!

[rumblefish360]

The correct side is the passenger side. The OE Carter carbs have the vacuum advance hose hooked up there.
I just forget which one is timed and which one is full time vacuum on the carb.

[dave571]

An easy way to tell is, If you can feel vacuum on the port at idle, you have it on the wrong port. Vacuum all the time is manifold vacuum, which is not correct for vacuum advance

Keep in mind, that vacuum advance is an economy feature. It will not affect your full throttle performance.

[74 DART SWINGER]

Iv heard the passenger side is the "timed" side which it has no vacuum at idle but slowly gets some as you give it throttle.The drivers side,is the full manifold vacuum,which it has vacuum at idle.Acouple i talked to also hook it up on the drivers side which made it run better and more "snappier".Im experimenting with mine right now.

[dave571]

Originally Posted by 74 DART SWINGER

Iv heard the passenger side is the "timed" side which it has no vacuum at idle but slowly gets some as you give it throttle.The drivers side,is the full manifold vacuum,which it has vacuum at idle.Acouple i talked to also hook it up on the drivers side which made it run better and more "snappier".Im experimenting with mine right now.

As I said, it shouldn't affect performance.
No matter which port you are on,t here is no vacuum on it at WOT.

If on manifold, it may mask the fact thge initilal timing has been set to low. Giving more initial timing, but only on light throttle, where there is still some vacuum.

What is the combo?
motor? cam? gears? stall? intake? carb? compression? initial timing setting?

[74 DART SWINGER]

318,8.7 cr,headers,eddy perf intake/carb,comp cams xe262
2.76 gears,904,stock stall
I have mine set at ~37 total.

[Tarrbabe]

You do un-hook the vacume advanced?
Don't be offended, it never hurts to ask.

[74 DART SWINGER]

Nope,i have it all hooked up

[dave571]

Originally Posted by 74 DART SWINGER

318,8.7 cr,headers,eddy perf intake/carb,comp cams xe262
2.76 gears,904,stock stall
I have mine set at ~37 total.

37 total,(with the vacuum off I hope) but what is your initial?

Yes the total is more important, but if the intial is too low, then throttle response suffers.

276 and a stock stall will really lug that motor down.

If you can run this with say 15 or 16 initial and not have it all in till 3K you should get decent results.

[Tarrbabe]

be set with the vacume advance unhooked. When you rev the engine with it hooked you get even more advance than the 37 degrees you are looking for. Un-hook the vacume advance and plug the line. Set the total timing at 36 degrees and then hook the advance. Your total will be somewhere in the 50 degree area (I think, going by old memory) You are running your timing retarded for what the engine wants. IT WILL RUN BETTER.

The reason I stated not to get mad is, ( What I said is BASIC TIMING 101 ) The very first thing I learned about setting the timing was to disconnect the vacume and plug. Later I got smart and went without vacume advance on a 56 Chevy 327. 4.5 MPG was the result. It ran great but with a 16 gal. gas tank, I could not go anywhere out of town without stopping for gas.


Just thinking out loud.

[dodger1]

Gotta agree with tarrbabe - the vacuum advance at part throttle makes a big diff. in fuel economy and doesn't really affect W.F.O. as there isn't any effective vacuum at full throttle, nor at idle AT THE PORTED VACUUM SOURCE!! If you're hooked to manifold vacuum the engine will not see initial timing, only an advanced value.