RE: {Chrysler 300} distributor caps/ rotors , two heights

[<henry.schleimer@xxxxxxxxxxxxxxx>]

The only time I have encountered a distributor cross/miss firing problem was on a slant six and the problem was a cracked cap.  Hardly a design problem.  I really don't know why you are looking for solutions to problems that are uncommon?  Just buy the right parts and be done with it.

You should watch the latest video from Nick's Garage if you want to see what cross firing looks like and how to fix it.  Unfortunately, you have to watch to the end. I personally found it painful to watch as I have no time for these dodgy aftermarket fuel injection systems that create more problems than they supposedly fix. https://www.youtube.com/watch?v=jwXlIAwVQ1s

Henry

-----Original Message-----
From: John Grady <jkg@xxxxxxxxxxxxxxxxx> 
Sent: Friday, 4 April 2025 2:24 AM
To: henry.schleimer@xxxxxxxxxxxxxxx
Cc: chrysler 300 club <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: Re: {Chrysler 300} distributor caps/ rotors , two heights

hi there are  insulating ribs up under the tall ones ( look in) and if I remember tight they cut the round stationary pin away more , so radius of tip may be more As i say , why change it unless an issue idealistic image of the  tip under contact is not true due to advance , particularly  when both advances are in . Try and figure out that angke it moves , I did. 
see ford late caps, an inch more  diameter . Kits out there to use that on GM  — All this not done for “ the hell  of it” laugh People blamed wires for cross firing , especially under hemi wire  covers . As EE I think that is bs . It was the cap not aligned carefully st both extremes . imho 
> On Apr 3, 2025, at 4:15 AM, henry.schleimer@xxxxxxxxxxxxxxx wrote:
> 
> Rock Auto lists caps for 57 392 but not 55/56 so might be different.  You can check other models to see if they list the same caps as the 57.
> 
> Why should the height of the cap affect cross firing?  The spark jumps horizontally, not vertically inside the cap.  Just need the matching rotor.
> 
> Henry
> 
> -----Original Message-----
> From: chrysler-300-club-international@xxxxxxxxxxxxxxxx 
> <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of John 
> Grady
> Sent: Thursday, 3 April 2025 6:32 AM
> To: chrysler 300 club 
> <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
> Subject: {Chrysler 300} distributor caps/ rotors , two heights
> 
> i posted some thing a few years back on this with actual height numbers , I was surprised then that  there seem to be two heights of distributor caps and two heights of rotors (to match ?)
> It did not occur to me    at the time but metal body seems the same ? asking for “ Chrysler cap or Chrysler rotor may get to be a problem
> So 55 is a short cap ,I have NOS one  not sure when it changed ? and later A block ( say 60 318 ) and B bock in 60 at least have tall cap . 392 354 not sure
> So not only A/B issue ( I suspect they are the  same—  despite rotation change )   but do tall caps / rotors become a possible upgrade for 55 era distributors  ?
> Maybe someone has dug into this . The early tall were often Tan , maybe to avoid errors ? use tall rotor you  have a much better distributor. If it fits
> Short one must have jumped across or cross fired at times ,,else why do this , ?? GM 8 was always quite  tall    …
> hmm
> anyone have any thoughts ?  
> jg
> 
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