Re: {Chrysler 300} Setting timing with transmission engaged?
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Re: {Chrysler 300} Setting timing with transmission engaged?



What is being discussed here is a standard Stall test, Auto Trans only. I did this after any Trans O/H or major repair. You do as described and the Torque Converter will stall the engine at some given RPM. You just can't make it rev any higher. This tests the TQ and  there is a RPM value in any service manual. Then with some simple tweeks, you gain a few more RPM's and you have the optimum engine setting.
You do not want to hold it there for long, but the max RPM will be the same each time, until you add in the tweeks, which will make it vary.

By the way, you are using both feet on the pedals to do this test. Which is why you do NOT use your left  foot for braking. In a panic situation, Left foot breakers will mash BOTH gas and brake to the floor and that car WILL NOT stop.

Happy New Year to ALL, Ray

On Tue, Jan 4, 2022 at 3:12 PM Ryan Hill <ryan_hillc300@xxxxxxxxxxx> wrote:
Putting an engine under load when making adjustments always made sense to me and usually provided the best results, as Dan describes. I use all the tools I have available and set my timing with a light to get it in the ballpark. Timing, Vacuum, dwell, idle speed..repeat. Then final tweaking in gear under load.....this doesn’t hurt the transmission any more than climbing a hill or towing....or letting some smoke out of the tires. 

With my boat I had the luxury of making adjustments to my marine engine while running under load at any speed I chose. I would adjust the timing by turning the Mallory dual point until the engine was smooth and crisp, I could hear and feel the sweet spot. Then I’d set the idle, confirm dwell and vacuum, and enjoy. This ALWAYS worked better than setting it up on the trailer and I noted it never ran very well at all when within recommended specs. 



Ryan Hill

On Jan 4, 2022, at 11:43 AM, Ray Melton <rfmelton@xxxxxxx> wrote:

Like most of us, I had never heard of this method of setting timing.  Isn't this pretty abusive to the transmission; i.e., burning the internal clutches?  (At least, that's what my Dad always told me when I was learning to drive.)

Dan, did you ever record what the initial and total advance was after setting it the "old timer's" way?   That way, you could re-set timing in the future with less stress on the transmission, and without the need for two people.  If anyone in the Club is brave enough to replicate this timing method on either the  392 Hemi or 413, it would be very helpful to other members to record those advance numbers, both initial (~ 600 RPM) and total (~3500 RPM).

Ray Melton     300C cvt in New Mexico

**********************************************************

On 1/4/2022 8:42 AM, 'Dan300f' via Chrysler 300 Club International wrote:
Hi all:
 
A couple of years ago, I needed a tranny overhaul.  At the time my F was running crappy and I could not find the correct timing to make it run right.  The tranny shop manager, an old Mopar guy, told me to get in the car, set the parking brake, hold the foot brake, start the car, put it in drive and rev it up.  He moved the distributor until he found the maximum rpm and tightened it down.  "There, he said, that's how we timed them in the old days."  He had me take it for a drive and when I got onto the street, I floored it.  At the first upshift, I thought the car was going to turn itself upside down.  Never had I seen so much power in that car.  Still runs the same way and I am elated!  The following week, I drove the car to the Club Meet north of San Francisco.  Not only performed like an F is supposed to but my mileage increased from an average of 10-11 mpg to 12.5 mpg.  And I usually don't let grass grow beneath my tires.
 
Dan Reitz.
Bell Canyon, CA
________________________________________________________________________________________________________________
In a message dated 1/3/2022 2:08:17 PM Pacific Standard Time, ronbo97@xxxxxxxxxxx writes:
 
Another way to set timing is to attach a vacuum gauge to the intake. Warm car up, then adjust timing until gauge reads 18" Hg at curb idle. Then take it for a drive. If it's still pinging, retard a bit and try again.

Ron


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Ray Jones. Y'all come on down an see us. Ya hear?

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