Re: {Chrysler 300} Carter carbs / storage
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Re: {Chrysler 300} Carter carbs / storage



In Ohio we have Recreation gas or REC at separate pumps Marathon stations. It is ethanol free. Octane rating is 90. I run it in all of my small engines , boat and my 1960 New Yorker. The only way to go!

On Wed, Aug 21, 2024, 11:23 AM 'James Douglas' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Some years ago, I saw some mathematics someone had done on the thermodynamics of gas with ethanol. Basically, one needs to run richer main jets, about 10% to get the same amount of burn as the older gas.

 

I have not done that on the 300K, but I did do that on my 1940’s Desoto with the BB Carter’s on them. It did make a difference, and they run better.

 

James

 

From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of Finsruskw@xxxxxxxxxxxxxxx
Sent: Wednesday, August 21, 2024 06:52
To: Donald Verity <chryslerdon@xxxxxxx>
Cc: Frank Hinmon <fhinmon@xxxxxxxxx>; Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>; John Grady <jkg@xxxxxxxxxxxxxxxxx>
Subject: Re: {Chrysler 300} Carter carbs / storage

 

We are lucky enough to live where ethanol free gas is readily available and I have been using it in the F without fail but the fact remains

that much if not most of it remains in the tank for long periods over the fall/winter & spring.

I always, without fail, to avoid long cranking of the starter, have to prime the car after a week or more more of sitting.

The crappy running during full throttle operation on the highway in the extreme heat like we are expecting this weekend is still an issue that first showed up during the trip to the Macungie, PA  meet in 2015.

The car seems to run much better in the cool fall air though.

THat is one reason, besides the 20 year old tires and others reason that I am hauling, for the FIRST TIME EVER a 300 letter car to the Omaha meet.

 

Dave Schwandt


From: "Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
To: "Frank Hinmon" <fhinmon@xxxxxxxxx>
Cc: "Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>, "John Grady" <jkg@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, August 21, 2024 8:38:17 AM
Subject: Re: {Chrysler 300} Carter carbs / storage

 

I live in RI. There are no ethanol free stations in RI, CT, or MA. Sunoco race fuel is the only alternative.

Don

 

 

 

Sounds like you might live in Calif.  since moving to Nevada I don’t notice that problem that much.  Come get some off road leaded gas

 

Frank HInmon

661-809-7994

 

On Aug 21, 2024, at 6:26 AM, 'Donald Verity' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Race fuel will solve your storage problems. Expensive, but better that rebuilding carbs and changing hoses.

Don

 

 

 

 

I have become extremely frustrated with what happens to our cars in storage , often after less than a year now, probably due to ethanol as a compounding problem .

 

You go to drive your car , it will not run right or idle etc due to residual junk “in carb passages”  after evaporation of fuel , plus what is in tank goes bad .

Don’t even say Stabil , it’s ethanol .

 

Briggs and Stratton make some special stuff,  as they have fat in this fire. I have been using it . It is an engineered product can’t hurt is thinking but still the issue remains . With a lot of cars able to go this gets really bad .

 

I wonder if anyone in club has a real answer ? “ Stabil  worked  for me “ is not a real answer , as in  moonlight worked for me .

 

Someone mentioned putting two stroke oil in with gas ,— that might work especially if a strong mixture of this was drawn into carb the day you put it away and you are rigorous about it , keep records etc 

I was thinking modify fuel line to a well done rubber hose or special fittings so you could easily  disconnect and do this, put the filter right at carb , disconnect line hold temp bottle with a hose at bottom , up over for last few minutes ?

 

“Original looks “ that do not work is just not  so good .

 

 

But the big takeaway on this I found yesterday on a hot rod site , as I have a 318 78 dodge truck recently restored , idle mix screws sort of unresponsive, stalling etc etc

Went looking about erratic  inoperable idle screws on Carter

( saw that issue many times on 300 )—  it has a rebuilt carb Carter BBD 2 bl rebuilt only a few years ago and ran great before two years on non use . BBD variations were used from 50 ‘s to 80’s as the mopar 2 bbl

 

So on the site the  guy mentioned that the problem arises in the narrowed-  down tip of the very  narrow brass tubes that dip into fuel to feed the idle circuit . The hole  at the end is long and tubular , smaller than the smallest drill in a 100 drill numbered set . It is made I think by swaging brass tube down . I believe AFB are same design , these tubes and a cover on them are part of the main venturi cluster held in with two special screws . unfortunately you have to pull carb top to get at it. Best  done with carb off …. obviously

 

Along the lines of why not try , i did this , sure enough junk in tiny tip hole from

dried gas . cleaned out with stainless wire , blew out with air … It works! Idle screws out 1.75 turns like normal !’ Before 6-7 turns still not running right

Awwwright!

All these years thinking some mysterious thing happens to carbs , cured by rebuild , $ time  and hassle . Now I feel I know something new

Good to

know …

Still learning … may help you , —- that , and use current edelbrock

needles in

our carbs , that cures deformed seats inside carb from too much golden screwdriver as taper is different

jkg

 

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