![]() |
Advance Wrong--What to look for?
A mechanic who was recently working on my car said I am getting full advance @ 2000 rpm. I understand this should not happen until about 3500 to 4000.
If I open up the diz what should I be looking for? Broken springs? Dislocated weights? I should be able to see a broken spring or a weight that has come loose. What else could cause this? Can I tell by look or feel if something is worn or fatigued? |
Paul,
You should look for a broken or missing spring on one of the weights. Remember, there are two springs in these things: one is a light spring and the other is stiffer. Both are required for proper operation. |
Thanks, Steve.
If springs are intact, is there anything else that could cause this? Is there any reason why someone would deliberately ramp up the advance this quickly? |
Not if his brain was intact!
|
Quote:
Sounds time to remove the distributor and disassemble it to clean it up and make certain that its working properly. The latter aspect should be done on a distributor machine. |
polarity backwards on MSD? done that once or twice with the same results
|
moneymanager,
LOL! Can never rule that out. Steve, Thanks again. Ben, Interesting. I thought I read somewhere that there can sometimes be issues between MSDs and the dizzies, but I couldn't remember what they were. I'll have to check out the polarity. Thanks. |
[QUOTE=Paulporsche;4273744]A mechanic who was recently working on my car said I am getting full advance @ 2000 rpm. QUOTE]
As long as it does not ping, consider yourself lucky. All in at 2k will enhance low end torque and throttle response. |
stlrj,
You might be on to something. This setup was prepared by Rudy Bartling (Google him if you don't know who he is; kind of an older Grady Clay w/ a German accent!) who's been working on these cars since the late 50s. I've been using it for something like 17 years w/o problems. The MSD has been on for 3 years. My mech said he found no broken springs. Ben, When you say you had the same results, you mean that polarity made no difference to the advance curve? |
Paul,
If the polarity of the wires that trigger the MSD unit is reversed, the advance curve is about 15degrees off. :) This is a common occurance so its something to check. The green coaxial distributor trigger wire should be connected as follows: center conductor to green MSD wire & violet MSD wire to the shield. |
Quote:
|
Quote:
no I had way to much advance at low rpm all do to polarity |
All times are GMT -8. The time now is 11:50 AM. |
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website