Re: {Chrysler 300} 300K A/C clutch diameter.

James,

The AC clutches with the external brushes from the 50s through '59 or maybe 60 were about 7" diameter overall. After Chrysler went to the induction style clutch activators (about 1960) the clutch diameter was reduced to a little over 5". That is what your K should have. I have both lying around and could measure them exactly for you later today.

Please note that there will not be a performance difference between the two because even though the clutch diameters are widely different the sheave (pulley) diameter is actually equal between them. And they can use the same length of belt.

Keith Boonstra

On Mon, Mar 27, 2023 at 9:43 PM 'James Douglas' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Hi All,

As far as I can tell the pulleys on the A/C are 6-1/4 inch OD. But I have noted that the actual clutch diameter on the one on the car which is clearly a reman is almost as large as the pulley in OD. The one on the bench that I got from John at Big M and he said came out of a ’64 the clutch OD is smaller by about an inch that the pulley OD.

Can anyone tell me if one or the other is correct and/or are there any performance differences between them?

Thanks, James

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