INTRODUCTION

[Mike Swayze]

how new are these trucks?
I am hoping to be able to scrounge most of the parts and am only beginning
to get an idea of what I will need.
I gleaned this from the net:
     TPI intake 
     TPI plenum and runners 
     Throttle body 
     MAF sensor, intake hose, filter case 
     Injectors (19 lb/hr for 305, 22 lb/hr for a 350) 
     Oxygen sensor (if your's doesn't already have one) 
     Knock sensor (if your's doesn't already have one) 
     Intake air temp sensor (goes in plenum underside) 
     EGR solenoid 
     Coolant temperature sensor 
     Cold start injector sensor 
     Electronic Control Module (ECM or computer) 
     Re-route EGR and charcoal cannister ported vacuum as per TPI setup 
     A/C bracket to TPI intake (upside-down U-shaped bracket)

I had talked with BDS about bank to bank and ballpark figures costwise wer
in the 3-7g range.
I would  hope scrounged parts would put me under 1g.
any ideas on specific later vortec sefi part# or manuals regarding such.

In the morning--Bye
Mike


At 05:52 PM 11/3/1999 -0800, you wrote:
>If I were you, I would stay away from the old Vortec CPI setup.  I have run
>one of these "spider-like" thingys across my bench and am fully convinced
>that it is the weirdest/dribbliest form of port fuel injection that has ever
>been conceived for mass produced vehicles.  One large TBI'ish looking
>injector modulates the delivery of fuel into six tubes, each of which has a
>spring loaded ball/seat poppet nozzle that cracks open at a specific
>pressure.  The spray quality is poor from each poppet, the dynamic response
>of the system is poor, and if just one poppet starts to act funky it can
>influence the others.  Fun to watch though!
>
>The later GM Vortec engines moved to a "S"equential"CPI" setup, which is far
>superior (ie; n-tiny solenoids connected to n-lines, with n-poppets), but in
>my mind this is still far less desirable than a true SEFI setup for what you
>or I are trying to accomplish.   The newest trucks have all reverted back to
>multi-port SEFI.............
>
>
>Walt.
>
>
>
>I am in the process of researching
>>>>fuel inj. options for this motor and from what I have read, I hope to be
>>>>able to scrounge up a vortec cpi setup to modify. I am new to diy_efi and
>>>>am still trying to digest what I have read so far. any help would be
>>>>appreciated.
>
>