Re: [Chrysler300] Another approach to the same problem

["Richard Osborne" <richard@xxxxxxxxxxxx>]

John,

It has been interesting to read other posts (and to get personally chastised by some others directly). 

Ultimately here's what I know and believe. My G hardtop runs GREAT with no butterflies. It is true it is difficult to start (only when cold), but this has nothing to do with the heat riser butterflies.  For me,  the rattling and eventual leaks of the butterflies are huge personal pet peeves. 

Once started, my car idles fine and the chokes pull off in what I believe to be a reasonable amount of time. I have never seen black smoke or experienced the coughing that typically goes along with a stuck choke. I rebuilt the carbs myself (from kits I bought from you a long time ago). I think I do a better than average job with Carters, but still can learn more tricks, maybe this has helped, I dunno?

When I bought the car, it showed 59,000 miles and had been parked for something like 20 years. One side heat tube was totally gone and the holes blocked off, but it had both elbows. Both chokes were missing and blocked off. Now that I think about it, the intake that had the tube totally missing was thinner than the other.

I believe that as long as there is a "heat circuit" under the carbs, and functioning chokes, things will be fine. 

Now you have me wanting to take the convertible apart to check those intakes out. It is all complete with elbows, tubes and chokes. It shows 80,000 miles.

The thing that puzzles me is how the cars run without the elbows. The reason this puzzles me is that I can't believe that the 4 bolts going into the heads are the only things holding the intakes and carbs, they're HEAVY! Seems like something would crack, I feel the elbow is there as much for support as it is for heat. I know, I know, Andy drove his G for something like 2 billion miles that way and didn't have any problems.

Bottom line is that if you drive them like you stole them, everything will be just fine.

I'm done.

Richard


 
>>> "John J. Hertog" <crossram@xxxxxxxxxxxxx> 03/13/07 10:00 pm >>> 
Wow -  nice can of worms I have opened.  Thanks all for your feedback.  I
must admit that, after having read various responses, both on and off list,
I am now more confused than anything.  Some people say the car won't run
right without heat under the carbs; and some others say they run just fine
that way, been there done that no problem. 

Bob J. -  yes, of course, without the heat riser butterflies forcing hot air
through the manifolds, the chokes will come off slower, even though, if
yours really open up within a mile, I'd say that's pretty good. 

Warren and some others have voiced their concern about no heat at all when
engine warm -   and then some others have answered that they have had no heat
at all connected for quite awhile and their cars runs just fine. 

Rich, I have spent hours and hours pulling off manifolds to replace
butterflies that people such as  you had broken off... It's a bitch of a job
and the parts to rebuild the heat riser valves are getting damn scarce.  My
experience with cars that had heat risers disabled is that they ran rich way
too long, fouled plugs, and didn't run right.  But then again, Bob J. says
his 300G is just fine that way. 

I presented the question to Jimmy at Allstate Carb -  he answered that the
lack of heat would be a plus, not a problem. I read to him some of the
e- mails arguing against turning off the heat to the bottom of the rams, and
he was still not swayed.  Jimmy does know these cars and the 2903 carbs, as
I have driven several to his shop over the years for roadtesting and
adjustments. 

Anyway -  I always prefer to keep cars as original as possible. So I started
thinking, without disabling the heat, how to protect the rams?   Made some
calls and ended up talking to the owner of Swain Technology
http://www.swaintech.com/     ; the owner tells me he can coat the INSIDE of
the heat passages with a heat- proof protective coating that will NOT burn
off or degrade.  Sure sounds like the way to go, to keep my last good set of
intakes from getting swiss- cheesed.  I am e- mailing him pictures  showing
the openings that he would have to work with (the two openings under the
rams as well as the choke pocket opening) ; he will let me know if his
equipment can handle it. 

I'll keep you all posted. If this works, and the rams can be effectively
protected against the corrosive effects of the exhaust gases, seems to me it
would be a wonderful thing and well worth the investment, and the complete
heat riser system and choke system could be kept factory- original...

John Hertog






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