DIY_EFI Digest V4 #216

[ECMnut at aol.com]

Stuart,
the Syclone & later vortec truck 4.3's had aluminum intakes. 
You can have'em coated though.  Also, the Syclone/Typhoon
V6 is MPFI, not SFI.  It fires all 6 injectors at once.  For
a port injection setup, you could use an intake manifold
and fuel injector hardware from a 93-99? 4.3 H.O. V6 which
 was a popular option in the S-trucks.   It has nice long 
torquey runners..  The EMC used in Syclones was the 87-90 
turbo sunbird (1227749) unit.  Can we talk you into a blower
or a turbo?  The chip already exists..  8-)
HTH
Mike V


>  I'm thinking if a lousy carburetor is so expensive, what about using EFI? 
>  I scanned the DIY-EFI archives for 4.3L, and discovered the preferred 4.3L
>  EFI is the extremely rare SFI used on the Syclone, and the almost-as-good
>  second-best is the CIS (one injector, six ports). However, the CIS system
>  seems to have an aluminum intake manifold, so I don't think I can use it
>  without the added expense of "fresh-water" cooling. Volvo and MerCruiser
>  sell V6 engines with TBI EFI, but these are much newer and rarer than
>  4bbls, so I haven't even bothered asking about junked ones.