Vacuum Advance hook up

[pontiacgp]

the vacuum does drop but the weights and springs determine the mechanical advance curve as the rpms increase...I have mine set to max out at 34* at 2000 rpm and it stays at 34* all the way up to the rev limiter

 

[richp85elco]

I believe it can be if there is too much advance but as stated for some motors like mine, 350, long duration cam and alot of mechanical advance in the distributor, using manifold vacuum can act as a free "recurve kit" because it provides additional initial advance and helps idle quality and can help the motor run cooler. Like what double v was saying it really just depends on your motor, its not set in stone

 

[pontiacgp]

this is why I like running the e-curve distributor, I set it with two dials in the distributor using a program on my pc to set the vacuum and curve and another dial to set the rev limiter... it's consistent every time

 

[richp85elco]

this is why I like running the e-curve distributor, I set it with two dials in the distributor using a program on my pc to set the vacuum and curve and another dial to set the rev limiter... it's consistent every time

to bad I'm poor otherwise i would have one sitting on my engine as well

 

[pontiacgp]

this is why I like running the e-curve distributor, I set it with two dials in the distributor using a program on my pc to set the vacuum and curve and another dial to set the rev limiter... it's consistent every time

to bad I'm poor otherwise i would have one sitting on my engine as well

we got winter coming up here, I'll buy you one if you want to trade places for the next 5 months...

 

[richp85elco]

i think i'll pass I already wake up shivering at 60F, but if you do i'll send you a post card of sunny california!

 

[Crazcnuk]

One thing you have to understand, is that vacuum advance is only for fuel economy at partial open throttle settings.

It advances the timing when you are cruising at steady speeds, such as driving down the highway. It also comes on full when you let off the throttle completely, as a side effect. Because of this you want to unhook vacuum advance at the dragstrip. Youdon't need all that extra advance while trying to slow down in a hurry at the end of the track.

Any time you are increasing throttle, or at idle there is very little vacuum to worry about.

 

[mebe007]

this is why I like running the e-curve distributor, I set it with two dials in the distributor using a program on my pc to set the vacuum and curve and another dial to set the rev limiter... it's consistent every time

to bad I'm poor otherwise i would have one sitting on my engine as well

check on ebay. i searched and searched. ended up grabbing my e-curve brand new in the box for under $250. Just have to look and wait.

 

['86 Monte SS]

Hello all, need a little advice..
I have a 450 hp Chevy 350, dart heads, Holley, turbo 350 w/ 3000 stall conv..
1- runs rich..form reading my vacuum advance should be plugged in the rt side of meter box, then where should my dist adv be plugged in? now it's in the frt bottom port of carb.
2- any help in adj the electric choke

 

[mheath717]

The "chevy" mechanic I know told me to always run full manifold vacuum. He used to work for a drag racing team, and thats what they always did. But my car likes timed vacuum better. When running manifold vacuum, the car idles way to high in park. It also runs rough in general. But when I run my line to the bottom of the throttle plate, it does just fine.