Re: {Chrysler 300} Longer range changes for the 300K

[Scott T <scotttaylorsc@xxxxxxxxx>]

James,

  I wish you well on your fuel injection conversion and would like to hear more about how it goes and the solutions you come up with.  Once done, I hope you’ll update us here with your trip. When the kids are grown and gone I want to start exploring more myself.  I have one that might enjoy it with me but the rest of the family likes staying closer to home.  

  The fuel injection kits are semi self programming and have the option of tuning via handheld control or laptop.  Yes, they’re generic to a point but this takes them from being a one size fits all to a solution for your engine at your altitude and temperature.  Not to mention the crappy gas available these days.  Here in SC, vapor lock is a big issue in the warmer months… now until October.  Always fun when your beautiful big block brute doesn’t want to turn over after it’s warmed up.  Don’t have that issue with fuel injection.  

  I fully get the originality crowd… at heart I’m in that group but practicality, finances, and the realities of life dictate some changes here and there.  I’ll take a Pertronix ignition any day over points… nothing wrong with having a backup though.

  I recently bought a ‘66 Belvedere convertible without a drivetrain.  Set up for a big block and a four speed I’m debating on what motor to put in it.  The fuel injection sounds nice and livable day to day.  A modern 6.1 Hemi may be a good solution for a regular driver.  

  The old Mopars are very reliable though as original, but common breakdowns were accepted years ago.  Roads were safer and folks would stop and help.  

Scott

On Wed, Mar 29, 2023 at 12:46 PM 'James Douglas' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

At some point in the next six months, I am looking into pulling the Carter AFB and the Dizzy and replacing it with an MSD Atomic EFI, one of their distributors, 6AL box, and coil. For daily driving, cross country over the mountains, and the like it will be much more livable. Starting one in Lake Tahoe was a chore and the thing had little power until you got it up to speed. I remember that well as do all my friends with 4-BBLS or three 2BBL cars.

 

The one thing that is going to be a real PITA is the coolant temperature sensor. MOPAR did not make it easy to add one with a car that had air conditioning.

 

I am looking at a couple of solutions. None of them are great. One is to use the plug on the side of the block near the coolant hole on the driver’s side. The downside is crud screwing up the readings.  Another possibility is to extend the 5/8 heater hose pipe up an inch or two and use a “Y” with one end for the heater hose and the other for the sensor. But this option may lead to the system being rich for too long as there is no flow unless the heater control is open. It is close the pump impellers and may be ok, but again, not sure.

 

The only other option and it is not a bad one, but an ugly one, is to use one of the Meziere Enterprises adaptors in place of the thermostat. It uses and AN fitting to go up to the radiator. It has two plugs on it that would allow for the sensors.  They also sell an inline thermostat housing that goes in the hose to the radiator. The upside of this would be that I could change the thermostat without messing around with the A/C to get to it.****

 

If anyone has any other ideas, I would like to hear them. I am planning this on paper right now, all the fuel and sensor and linkage issues. In the end, I am looking for a plan that of course can be reversed should anyone wish to do it.

 

Best, James

 

 

 

 

****I do not remember if I told the story here. Every teenage boy’s worst nightmare. I had just turned 16. I had a date with one of the prettiest girls in the school. I took off to San Francisco in a 1971 Plymouth with a V8 and Air Conditioning. We came across the Golden Gate Bridge and soon after the car died. To make a very long story short, I had to push that car out of intersections for hours. We would drive and then it would stall. Cool then another 10 blocks and it would stall. This is no way to look “cool” when you are 16 and with a girl on a first date!  In the end we made it to the concert at the Cow Palace on the opposite end of San Francisco and then back the 70 miles to our hometown. I was mortified the entire day. Turns out the thermostat stuck closed and caused vapor lock.  Ever since I have HATED that buried thermostat on Chrysler Big Blocks with A/C. Perhaps the Meziere Enterprises inline in the hose unit would not be a bad idea for cross country trips!

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