TPI vs PFI terminology

Peter Gargano peter at ntserver.techedge.com.au
Mon Nov 8 11:06:59 GMT 1999


Just looking at some archival stuff and came across

> ... the 808 is an ECM used in
> Australia, on their Holdens.  The 808 just happens to be the same as
> a 1227165.  In their application it's TPI, with MAP rather than MAF.

Now my 1227808's label says "3.8L PFI", and the DIY_EFI acronyms
page at:

   http://efi332.eng.ohio-state.edu/diy_efi/efi_ref.html#acronyms

says...

PFI = Port Fuel Injection 

TPI = Tuned Port Intake. Resonance characteristics used to increase airflow. 

TBI = Throttle Body Injection.  One or more injectors located at the throttle body.  Basically a more efficient carb. Also called CFI 

So, is my Holden a TPI PFI system, or more correctly just PFI?
(I included TBI above because this seems to be the logically converse 
of the PFI setup).

Comments?

PG.



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