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Vac advance tuning #1099260 10/22/11 05:21 PM 10/22/11 05:21 PM
Joined: Jan 2011 Posts: 15,894 Central Florida larrymopar360 OP Stud Muffin
larrymopar360 OP Stud Muffin Joined: Jan 2011 Posts: 15,894 Central Florida	I have read a bunch of info on tuning vac advance.One day I am going to change the springs in my vac advance distributor, because it doesn't idle good right now with it connected. My questions is this; will disconnecting the vacuum advance on my MP elec ignition that is connected to my MP 360/300hp crate motor require that I change initial timing or idle setting? It seems like it would to me, but then I don't really know. Secondly, on my all stock '80 E58 Aspen, should it not even be connected at all? It has the same ignition, and I thought maybe this ignition with vac advance connected is more than this engine really needs. One day I am going to be able to answer some questions instead of just asking them! Thanks. larry Last edited by larrymopar360; 10/22/11 05:24 PM. Facts are stubborn things.

Re: Vac advance tuning [Re: larrymopar360] #1099261 10/22/11 06:38 PM 10/22/11 06:38 PM
Joined: Apr 2010 Posts: 4,154 bethlehem pa M mikemee1331 master
mikemee1331 master M Joined: Apr 2010 Posts: 4,154 bethlehem pa	on the 360 - have you tried unplugging it and did it make a difference if you did? you say it's running bad - what does that mean? have you timed this yourself? on the stock Aspen - why do you want to unhook it? you keep referring to your electronic ign with both engines, i'm not sure what the relationship is? are you thinking because you have electronic ign you don't need your vac advance?

Re: Vac advance tuning [Re: mikemee1331] #1099262 10/22/11 06:46 PM 10/22/11 06:46 PM
Joined: Jan 2003 Posts: 11,079 Berlin, N.J. A abodyjoe I Live Here
abodyjoe I Live Here A Joined: Jan 2003 Posts: 11,079 Berlin, N.J.	read through these. may give you a better understanding of it.. It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt. www.MoparMisfits.com

Re: Vac advance tuning [Re: larrymopar360] #1099263 10/22/11 08:30 PM 10/22/11 08:30 PM
Joined: Feb 2004 Posts: 1,012 indiana M mcmopars super stock
mcmopars super stock M Joined: Feb 2004 Posts: 1,012 indiana	Quote: I have read a bunch of info on tuning vac advance.One day I am going to change the springs in my vac advance distributor, because it doesn't idle good right now with it connected. My questions is this; will disconnecting the vacuum advance on my MP elec ignition that is connected to my MP 360/300hp crate motor require that I change initial timing or idle setting? It seems like it would to me, but then I don't really know. Secondly, on my all stock '80 E58 Aspen, should it not even be connected at all? It has the same ignition, and I thought maybe this ignition with vac advance connected is more than this engine really needs. One day I am going to be able to answer some questions instead of just asking them! Thanks. larry on the crate ,plug that up.set total @ 38,and let her rip

Re: Vac advance tuning [Re: mcmopars] #1099264 10/22/11 11:41 PM 10/22/11 11:41 PM
Joined: Jan 2011 Posts: 15,894 Central Florida larrymopar360 OP Stud Muffin
larrymopar360 OP Stud Muffin Joined: Jan 2011 Posts: 15,894 Central Florida	Quote: Quote: I have read a bunch of info on tuning vac advance.One day I am going to change the springs in my vac advance distributor, because it doesn't idle good right now with it connected. My questions is this; will disconnecting the vacuum advance on my MP elec ignition that is connected to my MP 360/300hp crate motor require that I change initial timing or idle setting? It seems like it would to me, but then I don't really know. Secondly, on my all stock '80 E58 Aspen, should it not even be connected at all? It has the same ignition, and I thought maybe this ignition with vac advance connected is more than this engine really needs. One day I am going to be able to answer some questions instead of just asking them! Thanks. larry on the crate ,plug that up.set total @ 38,and let her rip The mechanic who installed the motor wanted to leave the vac advance disconnected, but I didn't. The idle is rough, so I know why he wanted to leave it off. I am going to disconnect it and check timing. Thanks. Facts are stubborn things.

Re: Vac advance tuning [Re: mikemee1331] #1099265 10/22/11 11:49 PM 10/22/11 11:49 PM
Joined: Jan 2011 Posts: 15,894 Central Florida larrymopar360 OP Stud Muffin
larrymopar360 OP Stud Muffin Joined: Jan 2011 Posts: 15,894 Central Florida	Quote: on the 360 - have you tried unplugging it and did it make a difference if you did? you say it's running bad - what does that mean? have you timed this yourself? on the stock Aspen - why do you want to unhook it? you keep referring to your electronic ign with both engines, i'm not sure what the relationship is? are you thinking because you have electronic ign you don't need your vac advance? Both are 360's. Rough idle on crate motor. I have not timed it because the mechanic who installed it is way more knowledgable and experienced than I am. I mention the MP ignitions because I thought the advance curve may be too aggressive for one or both of these motors. I don't know what springs these MP ignitions come with and if they are too aggressive for either motor, especially the stock E58. The E58 runs and idles fine but I am always looking to optimize performance on anything. I just wondered if I needed to be prepared to change timing and idle or could I just unplug them and see how they run.I am not at all knowledgable in tuning.I do have a timing light but no vacuum gauge. Thanks for the articles Joe, I will def read them! Larry Facts are stubborn things.

Re: Vac advance tuning [Re: larrymopar360] #1099266 11/06/11 06:30 AM 11/06/11 06:30 AM
Joined: Jan 2003 Posts: 4,152 Canada -- Posts: 4034 -Registe... 5 5thAve Doesn't care what this says anyway
5thAve Doesn't care what this says anyway 5 Joined: Jan 2003 Posts: 4,152 Canada -- Posts: 4034 -Registe...	If it's hooked up to the right spot vacuum advance shouldn't do anything at idle. The springs don't have anything to do with vacuum advance, they are part of the mechanical advance of the distributor and doing their job whether vacuum is hooked up or not.

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