[Chrysler300] On Our Distributors
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Chrysler300] On Our Distributors



I have been “ fooling around” with 3-4 distributors , sort of a side project by accident , initially launched by trying to straighten out a really beaten up F distributor .
First, I now know —for sure — that the advance slot in the part with the point cam definitely varies in length by car to  limit advance     . 300F .39” but a 55 plymouth one — brand New is .48” . This has huge impacts as a lot of mechanical advance (!long slot) forces one to less initial so you do not end up with way too much at high  rpm . Realize you cannot “ add initial timing” without going way too much high up !! = Piston hole! 
 Thus F had a factory “Hot rod   “ tune ,significant initial and very limited mechanical     , very light spring ... .so mechanical all in fast, probably by 2500 rpm.  - 2 Nd spring ( high rpm) so beefy I doubt it moves . Note that second  spring has loose loops as assembled so first one can move   . Takeaway : identical appearing point cams and slots are not . Unique to car tune . Never swap . P stamped on this F one ,Q on plymouth . Heads up . 
Second , for sure — hole in vacuum advance arm wears egg shaped , that kills you as initial timing can dance around — as can the whole timing curve at WOT due to that play .   Vacuum arm  is relaxed (in ) at WOT , it is all that keeps breaker plate in place rotationally — the can arm (!!)  — And that fit .. 

hardened pin in plate but too small diameter , soft steel arm wears . Later mopar have larger pin . They knew . 

Third , casual check of it with rotor on , the rotor hits cap terminals ! YOW . Disaster that  is  . Whole point cam , and thus rotor can move up and down maybe .125 . Cannot be  right    , although have noticed vertical play there before . How much ? 
This cam plate (on  both of them) has a little  sleeve welded under    , while later have ( I think ) a flat underside and a Loose Spacer. Same prurpose ? Or supposed to be a spacer too on F     ??    ? But spacer only stops any downward motion — not upward , which is what causes the hit.   I think maybe should be a spacer washer under that damn impossible to get off wire clip ?  
Started to make one ,to  Keep rotor down-for  sure   . But decided to ask first on site . Maybe parts were missing on my F dist . 75 w Mobil one really freed it up , grease is a sad joke . Heavy Oil mixes with grease we are really good 
Related , rotor fit to metal stem seemed very loose ; there is a flat “hat like “ top on the spring steel flat retaining spring inside the rotor , has a tiny projecting clip that snaps sideways into a slot — only if the “hat “ is pushed in all the way , and flat . That was wrong on my rotor , not seated . Looked like factory built it wrong . Fixed that ,but that made flat spring part on side sit really flat , rotor did not grab metal shaft well at all .. rotor could drift up !! Disaster again . Fixed that . Bent out side flap with tiny screwdriver — I have seen  tape , paper etc Jammed in  there on  this,so beware .   Will wipe out your cap and wires = big mess . Rotor fit should be vertically tight . Now it is . Should take effort to slide  up 

But now left with what seems like too much up travel,  on whole point cam and rotor toward the retaining wire clip  — and noticed this much up starts to lose advance pin engagement below.. cannot be right  . If no concrete answer going to make my spacer under retaining spring .  And what to do with a good F vacuum can  with egged hole. A Drill bushing or something ?  
All this very subtle and new info to me anyway . Thought I would share for comment and info. It is important to a good running car . That vacuum egg shape   thing might lead to  wandering idle , something I fought with minimal success for  years   On ram cars , — as vacuum can is active / moving then .. timing change = Idle rpm change . 
FYI , 
John   G 


Sent from my iPhone not by choice 

------------------------------------
Posted by: John Grady <jkg@xxxxxxxxxxxxxxxxx>
------------------------------------

To send a message to this group, send an email to:
Chrysler300@xxxxxxxxxxxxxxx

To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or
go to https://groups.yahoo.com/neo/groups/all/manage/edit

For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm

For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang
------------------------------------

Yahoo Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/Chrysler300/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/Chrysler300/join
    (Yahoo! ID required)

<*> To change settings via email:
    Chrysler300-digest@xxxxxxxxxxxxxxx 
    Chrysler300-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    Chrysler300-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo Groups is subject to:
    https://info.yahoo.com/legal/us/yahoo/utos/terms/



Home Back to the Home of the Forward Look Network Archive Sitemap


Copyright 2018 The Forward Look Network.  All rights reserved.

Opinions expressed in posts reflect the views of their respective authors.