[Diy_efi] TPI cam limit.

[Geoff Harrison]

You could try "filtering" the pulses. Either a long hose between the manifold and the MAP sensor,
or a plug with a very small hole through it, inserted into the vacuum line. An appliance repairer may
have one suitable. (Used in the pressure switch to control water in washing machines etc.)

To me it seems silly to limit air flow in an engine cause the electronics don't like the result. 
Go for the big cam.
Geoff H
----- Original Message ----- 
  From: Joe Boucher 
  To: diy_efi at diy-efi.org 
  Sent: Sunday, November 27, 2005 1:09 PM
  Subject: [Diy_efi] TPI cam limit.


  I saw a reference just a few days ago claiming the practical cam input lobe timing limit at .050' lift is 205 degrees.  Primarily the vacuum signal jumps around too much.

  Is there a similar limit on the MAP driven TPI systems?

  Thanks,

  Joe B


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