Re: {Chrysler 300} 1960-61 Crossram Dash Pot Replacements Heads Up

This is the way I have always understood it

The dash pots on the F's and G's are an anti-stall device that is spring activated and will push the throttle open a bit when it senses a low vacuum in the system.

Like when sitting at a stop light with your foot on the brake and not on the throttle, and/or when the A/C wants to kick in when at idle.

Easily demonstrated with the car when everything is properly adjusted.

The piston should be retracted when the car is running and will bump up the Idle when extended due to the internal spring.

When idling, you can see and hear whether it's working or not, the piston will extend and retract as needed to keep the engine at the correct RPM's.

If the engine starts to idle down too far, bingo, the piston will extend and correct the situation.

I had several rebuilt years ago after having bought them, quote.. "NOS" (yeah, right!!) off e-bay earlier and not testing them right away when they arrived

Dave Schwandt

From: "Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
To: "Anthony Rinaldi" <awrdoc@xxxxxxxxx>, "Carl" <cbilter@xxxxxxxxx>, "John Grady" <jkg@xxxxxxxxxxxxxxxxx>
Cc: "Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Sent: Monday, February 17, 2025 11:38:02 AM
Subject: RE: Re[2]: {Chrysler 300} 1960-61 Crossram Dash Pot Replacements Heads Up

I have to say that here in the stop and go driving of San Francisco, plus the hills, a dashpot is a must on anything I drive.

What happens all the time is it is my turn at a four way stop. I hit the throttle and start to go, and someone decides they were next. I then have to lift off the throttle quick.

This action causes an abrupt stop in the airflow and the car will stall. A dashpot drops the throttle blades down slow that last little but and allows the airflow to stabilize.

On my 1947 Desoto Custom Suburban, it was a particular issue. The electric dashpot on the Carter BB car had no adjustability to it. I found a few years latter Carter BB with an adjustable, with a screw, dashpot and dialed in the sweat spot. That has worked great for 20 years.

I urge everyone to make sure your dashpot(s) are working correctly as it enhances drivability a lot. If one is not available, then make one with some other dashpot or call Terrell Machine in Texas and see if they car rebuild your old one.

James

From: 'Tony Rinaldi' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Sent: Monday, February 17, 2025 09:26
To: Carl Bilter <cbilter@xxxxxxxxx>; John Grady <jkg@xxxxxxxxxxxxxxxxx>
Cc: Club International Chrysler <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: Re: Re[2]: {Chrysler 300} 1960-61 Crossram Dash Pot Replacements Heads Up

It is an anti-stall valve that slowly closes the last small portion when you let off the gas

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On Monday, February 17, 2025, 12:24 PM, Carl Bilter <cbilter@xxxxxxxxx> wrote:

My question is how critical is this component in normal engine operation? If so many are damaged either from age or "user error" in adjustment, which I think is true, then there must be plenty of crossram cars running around with a non-functional dashpot. It was eliminated on the J and Ram K, and they run fine without it.

Carl B. .

------ Original Message ------

From "John Grady" <jkg@xxxxxxxxxxxxxxxxx>

To "Tony Rinaldi" <awrdoc@xxxxxxxxx>

Cc "Club International Chrysler" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>

Date 2/17/2025 10:56:34 AM

Subject Re: {Chrysler 300} 1960-61 Crossram Dash Pot Replacements Heads Up

i beluve this part , not the bracket is on 440 six pack sticks in late 60’s and is reproduced , they were stalling on decell when you push in clutch . One can adapt it?

We should note these are broken by 300 owners all the time ! if you attempt to adjust it with one wrench your tear the diaphragm inside instantly . You must use two wrenches and be sure not to let the stem going into the can turn . If it does it is junk , it cannot resist turning torque , tears s hoke in center of diaphragm

jg

On Feb 17, 2025, at 9:53 AM, 'Tony Rinaldi' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

5 were bought of the 6. Last one left at low price

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On Sunday, February 16, 2025, 2:52 PM, 'Tony Rinaldi' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Hi To All,

This item is not available. I remember coming across a Pontiac Dash Pot that I recommended to friends who were able to successfully modify to fit and replace their non functional vacuum operated dash pots.

I am showing you the original part that had both sides of the vacuum can being metal. D5-34R

Then these newer replacements that have one side plastic.

One vendor has 6 at a reasonable price. The other has one that is double the price.

If you need a replacement or want to do a belt and suspenders in case yours fails, you may want to consider these alternatives.

Tony Rinaldi

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