[Diy_efi] TBI or TPI?

[Rick McLeod]

you're correct, TBI is Throttle Body Injection, which
usually is the use of a carburetor body w/ injectors
to replace the atomization function under computer
control (other primitive means are used also).
Therefore, most all intake manifolds are relatively
easy to conver to TBI, and I believe companies such as
Holly and Edelbrock and others make simple kits for
this.

--- Ashley Evans <hoshy at hoshy.co.uk> wrote:

> 
> Sorry for the n00b.  question.  I mostly lurk here
> to read and learn.
> 
> TBI and TPI mean what??
> 
> I thought that TBI means Throttle Body Injection, or
> am I sorly mistaken?
> 
> Regards,
> Ashley Evans
> 
> On 14/9/2005, "Rick McLeod" <dunvegan at sbcglobal.net>
> wrote:
> 
> >Clearly TBI would be an easy swap, replace the
> carby
> >w/ a TBI unit, add some computer, wiring, and a few
> >sensors and you're off and running.
> >
> >TPI is a much nicer solution, hence why GM went to
> it.
> >It's long runner design lends to very good low end
> >torque, but in stock form has limited top end RPM
> and
> >HP drops off toward the top end. That shouldn't be
> a
> >factor in your application, actually TPI would be a
> >great way to go. It is frequently dubbed a
> tow-truck
> >motor. There are a couple ways to even leverage it
> >more but in stock form would be great. There are a
> >couple aftermarket companies that have nice TPI
> >packages, but with a little work salvage yard or
> ebay
> >should yield all the necessary parts and leave you
> w/
> >just wiring. The main issue is fuel lines, as
> you'll
> >need a return line and a high pressure pump which
> are
> >not requisite of a TBI, and I would suggest from
> >experience to go w/ a Painless wiring harness
> rather
> >than fighting w/ a factory loom and making it work.
> >You'll appreciate having spent the extra in
> >elimination of frustrations and it being plug'n
> play.
> >
> >Good luck
> >
> >
> >
> >--- Mike <sonoma at shaw.ca> wrote:
> >
> >> I was thinking of adding TBI or TPI fuel
> injection
> >> to my  83 Chev 350 (M) which is in a 11000 lb GVW
> 1
> >> ton chassis.
> >>
> >> Has anyone setup both types of fuel injection are
> >> the costs for TPI a lot greater.
> >>
> >> What are the advantages and disadvantages of TBI
> and
> >> TPI
> >>
> >> I'm considering  going with FI because I'm hoping
> to
> >> get better fuel economy, better drivability, more
> >> torque and horsepower if possible.
> >>
> >> I don't want to change the heads on the engine
> just
> >> the intake.
> >>
> >>
> >> Any ideas or suggestions would be appreciated
> >>
> >> Thanks...>
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