TPS and RPM only?

[George M. Dailey]

Hi gang.  Am I the only one who believes that the OEM FI systems can't be
beat for cost, performance, and realibility on STREET driven, fairly STOCK
engines? The last TBI conversion I did was an 89 TBI system to an '75
engine. Cost me about $200 in salvage yard parts and worked flawlessly! I'll
comment futher, only if there is intrest.

GMD

At 08:49 AM 3/25/97 -0600, you wrote:
    
>>     I've been doing some research on the Holley ProJection, mainly in the 
>>     mail archives and at Holleys Website. Holley has a BBS which mainly 
>>     seems to work as a department for complaints for more or less 
>>     frustrated ProJection users. 

>>     Have you (or any one else on the list) had any problems to adjust this 
>>     system? Can the problems likely be explained by the fact that there is 
>>     no MAP sensor (i.e. "load sensor") on the ProJection.
>>     
>>     Any tips on this are interesting for me and highly appreciated.
>>     
>>     mike.olsson at eu.pnu.com
>
>Here's why I would go ProJection again .... it's half the cost of
>anything else (~$600), it works (though not perfectly), and
>I think it would still be faster for me than trying to retrofit
>a Ford EEC-IV to a Ford vehicle (unless it was an identical
>configuration, say an Early 302 Mustang with same drivetrain
>that I wanted to update to EFI). 

>I got some e-mail from
>some "furious users" wanting me to join a class action suit
>against Holley.  Summit dropped the version of ProJection I
>use, telling me they had too many complaints.  My research
>tells me many of the people who did the conversion were not
>prepared, didn't know enough, or weren't careful enough.
>
>The hardest part, to me, was getting the fuel intake and return
>lines in correctly.  Next, was the wiring for the unit and for
>the fuel pump relay.  [The ProJection box outputs two voltages
>to the relay for high and low demand apps, but Holley notes that
>that circuit can control a relay for the pump.  This removes the
>high current drive demands from the controller box and lets it
>run cooler.]  Oh, I forgot .... finding a place for the control
>box .... I made a plate for it and strapped it to my steering
>column in my Bronco.  It's out of the way and I can reach the
>knobs while "in flight" (though I can't see them).
>
>The TBI bolts on like a carburetor (I don't like the *way*
>it bolts on, but it's a minor inconvenience).  There is
>a really cheesy little plastic hootis that goes between
>the air cleaner and the TBI that's real flimsy.  And,
>the connectors to the injectors are crummy.  But, all-in-all,
>I think it's a good deal for $600.  I mean, everything's
>there, except the fuel line.  I added a "pre-pump" and
>a "pre-filter", because that's what I read recommended
>from some book I bought about the ProJection system.
>
>Once I had it hooked up, set all the pots to center, it fired
>right up.  I had it tuned and running in less than 5 minutes!
>I've probably got 10,000 miles on it.  Occasionally, I get
>frustrated because it seems to not be as peppy as it was
>the week before, or it doesn't want to run right when it's
>cold.  I don't understand those problems, and those occasional
>inconsistencies would make it difficult to work as my wife's
>daily driver, but it's okay for me.
>
>My calls to Holley tech line were answered okay (not great,
>just okay), but they were answered.  Of course, being on
>hold for a long time is not pleasant.
>
>Tom Cloud <cloud at peaches.ph.utexas.edu>
>
>
>