Re: {Chrysler 300} 300F Exhaust

I haven't investigated thoroughly, and not sure it will be an issue for me anymore now that my car resides in a warm climate, but I think if Chrysler had the technology of the electrically heated chokes like the Edelbrock carbs have in their kit for the 1478 carbs (widely available at auto parts stores, Summitt, etc), you wouldn't need hot air or hot water going into the rams, and it would probably work more consistently between the two carbs as well. Looks like it would adapt fairly easily to the 2903 carbs where block off plates reside to seal the choke pulloffs. I bet it's been done already by someone on their ram car(s).

https://www.amazon.com/Electric-Choke-Conversion-Edelbrock-Carburetors/dp/B00S9OX16E/ref=asc_df_B00S9OX16E?tag=bingshoppinga-20&linkCode=df0&hvadid=80882887866345&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=&hvtargid=pla-4584482457189041&psc=1

On Thu, Jan 9, 2025 at 5:41 PM 'dave mason' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Hi Don,
Not planning to completely block the heat tubes.
Normally I would agree to keep things as-designed, this is one reason I don’t care for electronic ignition or disc brakes on these cars, but I have seen many damaged/ablated/repaired ram intakes, so my guess is they weren’t expected to last as long as we are now trying to have them last. I don’t have an explanation other than maybe the aluminum doesn’t like to get as hot as the intakes can get. Therefore my plan is to use block off plates and drill a hole in each plate, maybe 1/4”, to reduce the heat and exhaust flow going underneath the carbs but not fully stop it. I’d like to hear from you and others whether this makes sense.
D&K

Sent from my iPhone

On Jan 9, 2025, at 17:54, Donald Verity <chryslerdon@xxxxxxx> wrote:

Chrysler put heat tubes on these cars for a reason. I may be just a dumb guy who is behind the times, but I will stick with what the Chrysler engineers found that works. BTW, Dave Schwandt's F had the J K headers on it.
Don

On Thursday, January 9, 2025 at 05:38:07 PM EST, 'dave mason' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Yes, we sure do; I can try and take some pictures, and also agree with Tony’s suggestion to at least partially block the heat riser pipes. Bob Merritt makes these block off plates, in a couple different styles. Also it may be worth asking Don Cole if there’s still a way to get a set of the heat riser pipes, with a run that are currently being made. In the case of our F, the original F exhaust manifolds have broken mounting ears, so its another case of making do…
D&K

Sent from my iPhone

On Jan 9, 2025, at 16:01, Nick Taylor <nicksgaragesd@xxxxxxxxx> wrote:

I believe the Masons have an F with the 300J/K headers in it. I don't know what mods were done to the exhaust system. I'm sure Dave will respond with information when he can.

Nick.

On Thu, Jan 9, 2025 at 12:45 PM 93saturnfan <93saturnfan@xxxxxxxxx> wrote:
Good day everybody,

I have a few questions concerning 300F exhaust.

Is there anyone in the club who has successfully installed the larger long "header" manifolds as seen on a J or K on their F? And if so does anyone have pictures of this exhaust setup both from up top and underneath?

To my knowledge they are similar if not identical in size to the optional exhaust manifolds that were on the 4 speed equipped F but have some differences I'm not privy to at the moment.

My current situation is this: I have a 300F with a passenger exhaust manifold that is unusable and not repairable as it is in several pieces. The downpipes/exhaust crossover looks as though it's been repaired numerous times and isn't in the greatest shape.

However, I do have a good set of K manifolds as well as a full set of the smaller heat elbow/pipes that to my knowledge will fit. I do know that I will need some different exhaust flanges to meet up with the rest of my otherwise stock appearing exhaust.

My goal isn't modifying for the sake of it, I'm merely trying to work with what I have available to me while staying relatively true to the spirit of the car. Unfortunately being a younger member (31 years old) I dont have all the knowledge or experience I'd like to surrounding these letter cars and classics in general and I would like to avoid messing with things if I dont have to since this was my late grandfather's car and means very much to me.

It's quite the learning curve as my first classic car and first car with carburetors so please forgive any ignorance I may have, it isn't willful.

Thank you

Ryan Stevenson

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