Peak and hold vs. saturated injectors

[Greg Hermann]

>----- Original Message -----
>From: Anthony Buccellato <clayb at sonic.net>
>To: <diy_efi at diy-efi.org>
>Sent: Friday, January 28, 2000 11:55 AM
>Subject: Re: Peak and hold vs. saturated injectors
>
>
>| > You are building a what?.   105 injectors?.
>| > To get anywhere near an idle would take P+Hs
>| > How big of motor is this?.
>|
>| 460 inch Big Block Chevy, twin turbo, liquid/air intercooler. 800 HP @
>| 6000 RPM currently, requires only 80 lb/hr. However, it is well within
>| reason for this setup to put out 1000 - 1100 HP at 6500 RPM, requiring 105
>| lbs/hr. I don't think it is such a good idea to install injectors
>| sufficient for current, unmodified, output levels, when I can simply turn
>| up the boost, and make some other adjustments, to add HP. I want a
>| reasonable amount of overhead to add HP over what I've already got.
>|
>| > Yes,  P+H, perfered cycling 1-5 msec,  Sat 2-10msec.  You can verify in
>| the
>| > archives
>|
>| Thanks. That's what I'd heard.
>|
>| > Yes, there is a day and night difference in flow rates from brand to
>| brand,
>| > and style to style.  Kinsler can plot things out for you.  Sure, be nice
>| if
>| > some folks would share their injector flow charts for time on vs
>| pressure.
>|
>| Can you recommend any mfg's that make a better product than others?
>|
>| - Clay

MSD fuel injection injectors (blueprinted Rochesters) are purported to work
the best for this sort of stuff--supposedly have better dynamic range than
the big Bosch stuff. You WILL need good dynamic range.
I AM with Bruce on this, staged, 1/3 primary, 2/3 secondary is the best way
to go.

Greg


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