Well Jon, if you read Mike's post he said he already has an engine with
TPI (which actually stands for Tuned Port Injection, which *is* a multi
port injection as it has an injector for each cylinder). Not sure where
you get that they won't handle much horsepower, as they originally came
on very high performance cars such as the IROC Camaro.
Mike I say go for it! Sounds like you have what you need, the wiring
harness from painless is under $300. Lots of people run these systems
and are completely happy, and it sure beats buying an aftermarket system
in the $2,000-5,000 range.
Bill
> I'm going to be putting one on my 350 which is going
> to be stroked to a 383 but not quite yet. Actually,
> I'm going with MPFI (MultiPort Fuel Injection) for
> best performance. I think you should go with TBI
> (Throttle Body Injection) and not TPI (Tunnel Port
> Injection). TPI will be more expensive but will get
> better performance. However...this would require the
> entire intake to be replaced...along with the
> distributor and possibly even the cam depending on
> your setup.
>
> With TBI, all that you should need is the throttle
> body...which is really just a carb with two fuel
> injectors on it, the computer to control it, and an
> electric fuel pump with regulator. Also, with TBI, I
> u just need the minimal amount of sensors (which their
> would be 3 of them). You only need 3 sensors to run
> fuel injection but all 7 would be best. Better fuel
> injection systems like MPFI, have a MAP computer with
> 7 sensors. You also might need to replace or add a
> section on your exhaust manifold or headers for the O2
> sensor.
>
> Both TPI and TBI cannot handle a lot of horse power
> and torque. If your 350 is over 350 horsepower, I
> suggest not going with either one if you get them off
> a production vehicle (i.e. late 80's Camaro). I'm
> looking at running 450 + HP and around 600 pounds of
> torque. Thats why I'm going to MPFI, which can handle
> up to 500 HP for small blocks.
>
> Sorry to say but it probably wont be that cheap. If
> you get an existing setup off another vehicle you'll
> still probably have to reprogram the computer for your
> engine setup. Running an already carb engine...I'd
> say stay with the carb until you decide to rebuild it.
> They maybe jump to the injection setup so that
> everything works right together. It will probably
> save you a lot of time and agravation.
>
> Just my 2 cents...
>
> --- laurie <lauriecorbett@ns.sympatico.ca> wrote:
> > has anyone put tuned port on there old trucks?
> > i have a 55 second and i have a tpi system from a 88
> > firebird
> > it has a 350 with a 400 tranny i need to buy a carb
> > anyway so i thought this
> > would be just as cheep and look different too
> > any ideas on wiring?
> > or any other helpful info or pros/cons
> > thanks
> > mike
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
|