Fuel pump advice needed...

[steve ravet]

Joe Boucher wrote:
> 
> I've been there at this point.  One of the easist and cheapest options to
> investigate is the stock in tank.  If you have spare transportation than the
> S10, pull the tank and look at the stock sending unit.  Details to study are
> the diameter of the unit and the configuration of the locking ring and the
> number and size of the tubes coming out of it.  Now, go junkyarding and see if
> the S10 sending units with FI are the same diameter and at least the same
> number or more tubes coming out of it.  The pumps will be for the TBI units,
> but the TPI fuel shouldn't externally be much different.

The JTR book has several pages on this issue.  The pickups are
interchangeable mechanically, although they use different size tubes for
the different functions (fuel feed, fuel return, cannister purge).  I'm
talking about pickups for the carb and FI version of the S-10 truck. 
You can get a tank pickup for a FI S-10, then put a TPI pump on it
instead of a TBI pump, and you should be OK.

On that pickup (FI), here are the hose functions:

3/8:  fuel supply
5/16: fuel return
1/4:  cannister

On the carbed version of the pickup, the function of the 5/16 line and
1/4 line are reversed.

--steve

> 
> This is one of the things I wish I could do over on my swap.
> 
> Joe Boucher
> '70 RS/SS Camaro  '81 TBI Suburban
> 
> lkurek at smtpgate.anl.gov wrote:
> 
> >      Guys:
> >
> >      I am installing a MPFI 3.1L engine from a Camaro into my formerly
> >      carburated S10. I *think* (we will see) I have everything accounted
> >      for mechanically, and the wiring harness modifications shouldn't be
> >      tough either. However, I am researching my option for a fuel pump
> >      capable of supplying this motor (45PSI). First, what would be the best
> >      way to go with this... a factory tank/pump from a FI truck, or should
> >      I get an inline pump and use the stock factory pickup/tank? Second
> >      question...does anyone have an inline pump they would like to sell :)
> >      I want to go the cheapest, but sufficient, route here. Also, if anyone
> >      has a line on an S10 FI tank/pump combo...I'd be interested.
> >
> >      TTYL!
> >
> >      Larry Kurek

--
Steve Ravet
International Meta Systems
http://www.imes.com
steve at imes.com