Injector Sizing

[Shannen Durphey]

Jason Weir wrote:
> 
> I have a question about injector sizing differences between TBI and
> TPI,  In TBI theoretically you have 1 injector fueling 4 cylinders, in a
> TPI there is one injector per cylinder, now here is the question,
> generally do TBI injectors have 4 times the flow capability or is the
> pulse width just increased by 4.  Say if you were gonna run a TPI system
> off a TBI ECM (assuming the ECM could handle the load), I wonder if the
> pulse width would be close enough so the thing would run or will I be
> dividing everything by on the fuel table by  4? Or somewhere in between,
> some more food for thought,  Jason
TBI injectors generally have a greater pulse width than tpi
setups.  I would say a fuel map diet is in order.

Interested in trying to get a prom from Edelbrock for their
7747 PFI conversion? 

Shannen
> 
> --
> Jason Weir
> 88 Wrangler - 258 Chevy TBI
> Fayetteville, North Carolina
> http://home.att.net/~jweir/tbi/inject.htm  --- TBI Installation Page
> http://home.att.net/~jweir/resume.htm      --- My Resume
> mailto:jweir at worldnet.att.net