RE: {Chrysler 300} Converter Stall Speed

John,

I am not changing the converter. I want to know the published stall speed range to make sure that with the tires I will run and the rearend gearing choices I am about to make that I am 100 to 200 RPM OVER the converter stall speed at 60 MPH.

I am aware that they used a different converter in the RAM cars. What I would like to find is what the factory specifications are for the two.

I happen to have all that data on the early Power Flite Converters from an SAE article. I just cannot seem to find anything that documents what they used in the various cars in the early 1960’s big blocks.

James

From: John Grady <jkg@xxxxxxxxxxxxxxxxx>
Sent: Tuesday, January 2, 2024 06:21
To: James Douglas <jdd@xxxxxxxxxx>
Cc: chrysler 300 club <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: Re: {Chrysler 300} Converter Stall Speed

Hi stall depends only on torque not rpm . The stall number is just that , not turning at all , slip at certain torque . How much it slips at dead start . Slip is also torque multiplication related

use stock ! axle ratio does not matter at all unless racing . Or wanting slip at start ( hot cam)

That said , ram J and K had very special converters “ high stall “ to allow more rpm at dead stop , more initial hp . Why J burned out of hole so easy . Penalty is a small drop in gas mileage , losses , runs hotter , ok with cooling but also a lot less tendency to stall or slam engaging at 700-800 rpm . ( problem with ram F and G )

unless hot cam , low gears ( race start ) stock stall is best . We are not smarter than design guy making that trade

Asnd A transmission sells a really good late cadillac converter adapted to 727 late mopar , i have not tried but plan to . converter tech has improved greatly in 65 years . Cadillac much better than ours .

Be careful input spline on 727 changes size somewhere around 64 or 65 , that coverter probably for later input spline

John

Sent from my iPhone

On Jan 1, 2024, at 11:09 PM, 'James Douglas' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Does anyone know what the stall speed is on the converters used in 1964 and presumably 1963?

Playing with the final gear ratio. I want to see if a 2.76 would drop the RPM at or near the converter stall speed. That is not a good thing as it will generate heat in the converter if it drops below the stall speed. So, I want to make a graph of each ratio and the RPM from 35 MPH to 70 and see where the RPM is relative to the stall speed.

Thanks, James

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