Accel injectors

[Dave Zug]

Sooooory.. I have different info and I'll make one more pass standing behind
the statement.
I understand GM changed the base FP for the TPI cars at some point from
sub-40 to the 43.5.

Here: I got this somewhere... (sorry author)

"The 5.0L injector is sized to deliver approximately 4.05 milligrams
of fuel with a 2.5 millisecond pulse or 18.13 lbs per hr at approximately
36 PSI. The 5.7L injector is sized to deliver approximately 4.83 milligrams
of fuel with a 2.5 millisecond pulse or 23.92 lbs per hr at approximately
43.5 PSI."

Theres an issue as to wether this is the way they actually rates them. If
the early 305 TPI cars use 39 psi that might be the 19# rating.

Someone straighten me out if I am giving incorrect info to lurking FI tuner
vendors ;-P

P.S. heres info for converting to higher pressures:
New Inj Flow Rate = Old Flow Rate * SqareRoot(NewPressure / OldPressure)
Courtesy, of coarse, of someone elses useful posting.

----- Original Message -----
From: <timsiford at hushmail.com>
To: <gmecm at diy-efi.org>
Sent: Sunday, January 07, 2001 8:54 AM
Subject: Re: Accel injectors


>
> >The 19# injector in the 305 TPI was rated at 36 PSI I beleive.. If this
> >is accurate, at a 45 PSI base setting they will deliver 21.2 lb/Hr..
> >plenty for a stock 350 running less than 245 HP.
>
> Nope.  The GM 19lb/hr TPI injectors were rated at the same pressure as the
> 22lb injectors ... 43.5PSI.  Think about it ... they both use the same ECM
> and the stock injector constant is in tune with the idea that they are
rated
> the same.
>
> Tim
>

----- End of forwarded message from owner-gmecm at diy-efi.org -----
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org