Re: {Chrysler 300} Ram tuning

["'dave mason' via Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>]

Might be interesting to get user feedback from those with ram cars to see if they have a problem with the car cutting off when going into gear, or other problems you mentioned.  Our red G coupe does not do this.  Never a problem cutting off when going into gear (even cold) or while driving.  Regular 2903 carbs, no carb mods.  Don V did the FSM procedure to sync carbs on this car after rebuilding the transmission which improved it; I later R&R’d the carbs and did the FSM procedure as well.   I think this helps a lot but not sure what the difference is with cars that have an issue.  Everything is stock- correct distributor (points). Regular thermostatic chokes.  Regular fuel pump, not a high volume type.   I couldn’t tell you how much vacuum pull the advance can has… might be worth looking at some data from members if we know biggest factors that impact this.  Do people with a problem have the anti-stall dashpot working right etc.  Lots of variables here, but data may help.   Is distributor vac advance can a big factor…

D&K

Sent from my iPhone

On Sep 17, 2026, at 08:37, John Grady <jkg@xxxxxxxxxxxxxxxxx> wrote:

This is an old subject but years have gone by and those interested in this , some pretty smart guys have gotten in pretty deep ..... I have " tuned " a lot of rams over the years and surprised by variability in final outcome . Despite a lot of effort, some cars kind of fight, you   a few settle in. 
This is not about obvious stuff we all know , it is about things rams do at times. Maybe all times , more or less . And  some on site have really gained significant knowledge over past 20-30 years 
I have one fighting me now    , the constant fight between stable rpm at idle and slamming into gear  and  then stalling. As if idle has no torque if " loaded up" They even  mention this " rough engaging" in user guide on F .  
Part of it is due to unported vacuum to ignition , always full advance at idle . If vacuum drops ,at trans engage,  ( it does) ignition retards = stall    . I mean this is real and anti stall  thing grew out of it, but opening throttle more just off idle drops vacuum more . Thin line  there . And I think design is flat out wrong we have to tune around it .. I was thinking ??? add a small vacuum can and orifice  to slow down advance action , or buy carbs with ported vacuum like every single other car  the world has  . Carl did that his car runs great . AVS calls to me .. 
The second thing is the tendency to stall off a stop sign depending how much you feather pedal . 
It feels like it goes lean momentarily ( remember this is some cars not all) 
So seems like  carb squirt is either late  to the party with small thrittle motion  startup off idle , not enough gas , or idle mixture wants to be richer than optimal ( as set by vacuum gauge) to cover this transition It us really bad puling into traffic  and car suddenly stalls, adds stress to driving  . This is  tangled around issue 1 
I am ignoring warm up issues , another whole thing , but gets into this in first 15 minutes 

Lets call it ole ram guys , philosophy etc . 

Can be made to be acceptable , yes, but really optimal   -- no, not easy  to get to . And how about ignition timing  ? they say "no spec for that  idle timing  with vacuum on , just set with off"  .but it IS on st idle   . And high , ? leading to above sensitivity  to stalling slamming all that  
Deep thinkers on this , insights gained welcome .. 
J

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