|
Re: timing/vacuum advance
[Re: Ronnman]
#1662113
08/25/14 03:05 PM
08/25/14 03:05 PM
|
Joined: Jul 2003
Posts: 1,212 Canton, Ohio
Crazy68Dart
pro stock
|
pro stock
Joined: Jul 2003
Posts: 1,212
Canton, Ohio
|
If you can get the engine to tolerate the additional advance at idle it will help with cooling (as long as it isn't too far advanced of course). At cruise it typically helps with mileage and also cooling (although at cruise this is less of an issue).
Have you hooked up a vacuum gauge? Do that so you can see what your vacuum can is seeing in terms of vacuum and behavior. Having unstable vacuum is not going to do you any favors at idle if attached to manifold vacuum.
Just wondering if you might not have multiple things fighting against one another, or the build is just such that vacuum advance cannot be integrated.
383, Hemi 4-Speed, AlterKtion, D60
|
|
|
Re: timing/vacuum advance
[Re: RapidRobert]
#1662116
08/25/14 10:02 PM
08/25/14 10:02 PM
|
Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 16,376
|
What you're describing aftar all is said and done is PHASING. For some stupid reason when the ignition fires, the rotor isn't pointing directly at a pole. This isn't too bad, until the vacuum advance kicks in. Now, as the vac advance increases, the rotor moves farther and farther away from the correct pole until it is closer to the next pole and the spark jumps there. Look at this Ebay link: http://www.ebay.com/itm/Mopar-Modified-D...tr#ht_777wt_916 to see what the fix is. I don't know if your particular distributor uses this kind of reluctor, but you need to move the reluctor with respect to the distributor shaft so the rotor is in a better place when it fires, and the vacuum advance doesn't move the rotor too far away from the correct pole. Setting the gap is fine, making sure the wires are hooked up correctly is fine, but in the end it's phasing that's my interpretation of your problem. R.
|
|
|
Re: timing/vacuum advance
[Re: bill8121]
#1662119
09/01/14 11:45 AM
09/01/14 11:45 AM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
Bill have you made a mark on the dist rim or drilled a hole in the cap to see where you're phasing is at? On the rotor/shaft rotational slop is that lower shaft/intergear slot slop or very light springs (you're stretching the light springs when you twist the rotor) and with real light springs you cannot (easily) tell if you're into the springs or if it's the lower tang slop but lets see where you are at with RP first
live every 24 hour block of time like it's your last day on earth
|
|
|
|
|
|