[DeTomaso] Feedback from someone who knows - FI & 180'S - Do headers affect scavenging in individual cylinders?

[Mad Dog Antenucci]

Ken & other Speculators,
   
  Thought I would share below what Mike Trusty sent me on the EFI lean out concern Ken addressed.
   
  Dawg

Mike Trusty <miketrusty at msn.com> wrote:
        v\:* {behavior:url(#default#VML);}  o\:* {behavior:url(#default#VML);}  w\:* {behavior:url(#default#VML);}  .shape {behavior:url(#default#VML);}        st1\:*{behavior:url(#default#ieooui) }                In an engine running on the edge that may be a problem but not on an engine that will be running basically rich at full throttle like yours will be.
   
  BUT, in the turning process you have the ability with YOUR system to trim the fuel and the advance for each individual cylinder.  If you were using individual exhaust gas temperature probes you could see the exhaust temperature from each cylinder and adjust the fuel delivery to that cylinder.  This can also be done by reading the spark plugs.  You can do a full throttle acceleration then coast to at stop and read the plugs.  You can then, with YOUR system, adjust each individual cylinder enrichment to either lean the cylinder or enrichen it to make each one the same.  BUT, again, it’s just not something that you need to worry about.  Its fuzz on a nats back but you can trim that fuzz if it offends you.
   
  There other things that effect the same thing cylinder to cylinder.  The injectors may not flow the same.  If you flow test the injectors and find that one flows 5% less fuel than the other seven injectors you don’t have to throw it away and buy another.  With YOUR system all you do is give that one cylinder/injector a pulse width that is 5% more than the other seven.  More fuzz that you actually don’t need to worry about but can if you want to.
   
  As I said about you can even advance and retard the timing to each individual cylinder if the need is noticed.  You can have #1 cylinder firing at 36 degrees advance and the #2 cylinder firing at 24 degrees on the same stroke is you so desire.
   
  
  
    Mike Trusty Engineering
  15119 Gorgeous View Trail
  Little Rock, AR  72210
  Ph:  501-224-9013
  Fax: 501-421-0151

      
---------------------------------
  
  From: Mad Dog Antenucci [mailto:teampantera at yahoo.com] 
Sent: Tuesday, February 19, 2008 2:36 PM
To: miketrusty at msn.com
Subject: FI & 180'S Fwd: Re: [DeTomaso] SPC - Do headers affect scavenging in individual cylinders?

   
    Care to comment on Ken's email on tendency of FI  leaning out?

     

    

Note: forwarded message attached.

   
    Mad Dawg Antenucci 
Team Pantera Racing 

    The 1st & still the only vintage race team in open road racing 
www.teampanteraracing.com





Mad Dawg Antenucci 
Team Pantera Racing 
  The 1st & still the only vintage race team in open road racing 
www.teampanteraracing.com