Holley Projection article

[Raymond C Drouillard]

On Thu, 23 Apr 1998 13:45:00 -0400 Thomas Matthews
<Tmatthe1 at worldnet.att.net> writes:
>Yes, I'd like a copy... I'm also interested to know how much pressure
>the Holley injectors can take before they lock up, or any other
>detrimental effects take place...

I have no clue how much pressure they'll take.  They have built-in
pressure regulaters, though.  The instructions say to use a 3/8" return
line (I think).

>Also, is there a way to find the stock rating of the injectors by part
>numbers, and do they interchange with GM TB injectors?

P/N        CFM    # Inj    LB/Hr rating
501-1      300      1      90    (Ford & GM step van)
501-2      300      1      90    (Jeep 255 I6)
502-1      670      2      80    (analog, spread bore)
502-2      670      2      80    (analog, square bore)
504-1      900      4      80    (analog, 4bbl)
504-2      700      4      65    (analog, 4bbl)
504-11     900      4      80    (Pro-Jection 4D)
504-12     700      4      60    (Pro-Jection 4D)
504-13     650      4      45    (Pro-Jection 4D)
504-21     900      4      80    (Pro-Jection 4Di)
504-22     700      4      60    (Pro-Jection 4Di)
504-23     650      4      45    (Pro-Jection 4Di)
502-2211   n/a      4      90    (Chevy Big Block Tunnel Ram (two
throttle bodies))

>How are they held in place if I was to change them? 

They're held in place (above the throttle body) with a couple of screws. 
I never had any reason to remove them, but they're supposed to be really
easy to remove.

>TIA,
>Tom
>

BTW, check out www.holley.com

Ray Drouillard

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