Re: [Chrysler300] Exhaust gas temperature

["Jerry Lindsay" <jerrylindsay.300h@xxxxxxxxxxx>]

My 440's and 383's never over heated but the heat in the engine compartment was "HOT". Don't known if it was the Florida factor or not. Also once I turned them off, they were hard to start. Kept cranking for awhile until catching on. ????

Jerry Lindsay
Seminole, Fla

Just may fall into the pool today.
  ----- Original Message ----- 
  From: smopar@xxxxxxxxxxxxxx 
  To: John Nowosacki 
  Cc: chrysler300@xxxxxxxxxxxxxxx 
  Sent: Tuesday, May 11, 2010 1:30 PM
  Subject: Re: [Chrysler300] Exhaust gas temperature


    
  With today's gasoline, a 440 that doesn't ping is a rarity when timed correctly. Assuming the heat level you are experiencing is really abnormal, I would suspect the timing isn't really proper. Keep in mind that 1970 and later 440 engines at least had solenoids that retarded timing at idle 5 degrees to better control hydrocarbon emissions. Off idle the distributor provided normal advance. If you no longer have an operative solenoid or have replaced the original distributor with another one without such a solenoid, then you might want to adjust the timing for more advance compared to the factory setting recommended. Basically, retarded timing sends exhaust heat down the exhaust rather than more efficiently using the energy to propel the vehicle. 

  Even today's new vehicles implement very retarding timing at cold start to rapidly send heat down the exhaust to quickly light off the catalytic converter within about 15 seconds for clean emissions. Some techniques haven't changed all that much.
  Steve Albu
  ---- John Nowosacki <jsnowosacki@xxxxxxxxx> wrote: 
  > Hi group,
  > What are the causes/cures for excessively hot exhaust gas temperatures on a
  > 440 V-8?
  > My friend has a car with a 440 that seems to run fine, no pinging, correct
  > timing at idle, no overheating or boil over of water/coolant, but it is
  > always very hot under the hood from the exhaust manifolds and rest of
  > exhaust system. If timing at idle is good, could it be that it is not
  > advancing far enough with throttle open while driving causing a retarded
  > condition which causes the manifolds to get hot? Could a carb with too
  > small of jets be causing a lean condition while throttle is open while
  > driving? Could a too radical of replacement cam during engine rebuild cause
  > this? Any theories appreciated.
  > 
  > >
  > > 30 days of prizes to be won with Hotmail. Enter Here.
  > > http://go.microsoft.com/?linkid=9729709
  > >
  > > [Non-text portions of this message have been removed]
  > >
  > > 
  > >
  > 
  > 
  > [Non-text portions of this message have been removed]
  > 
  > 
  > 
  > ------------------------------------
  > 
  > To send a message to this group, send an email to:
  > Chrysler300@xxxxxxxxxxxxxxx
  > 
  > 
  > To unsubscribe from this group, send an email to:
  > Chrysler300-unsubscribe@xxxxxxxxxxxxxxx
  > 
  > 
  > For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm
  > 
  > For archives go to http://www.forwardlook.net/300-archive/Yahoo! Groups Links
  > 
  > 
  > 



  

[Non-text portions of this message have been removed]



------------------------------------

To send a message to this group, send an email to:
Chrysler300@xxxxxxxxxxxxxxx


To unsubscribe from this group, send an email to:
    Chrysler300-unsubscribe@xxxxxxxxxxxxxxx


For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm

For archives go to http://www.forwardlook.net/300-archive/Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/Chrysler300/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/Chrysler300/join
    (Yahoo! ID required)

<*> To change settings via email:
    Chrysler300-digest@xxxxxxxxxxxxxxx 
    Chrysler300-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    Chrysler300-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/