Ford injectors (& Question)

[Romans, Mark]

I think the 10 ms rule is because almost all the bins I have looked
at for 89 are in double fire mode.  I have seen a couple of 305 bins
that were single fire mode, but all the 350's I have seen are double
fire mode.
Mark
----- Original Message -----
From: "Dave Zug" <dzug at delanet.com>
To: <gmecm at diy-efi.org>
Sent: Friday, August 18, 2000 12:22 AM
Subject: Re: Ford injectors (& Question)


> I have a few notations and a question after reading this thread.
>
> I have a set of 28# stock GN injectors if anyone wants them. $35 +
shipping.
> I bought them off ebay, no guarantees but the guy said they were 80k miles
> and good.
>
> The SVO's I DO have, but not installed in the 383 yet. I knew they were
> rated at less pressure than the GM's but now I know 39 psi is the test
> pressure.. Thanks.
>
> A friend has SVO's in his ZZ4/HotCam TPI... one clicked and he replaced
it..
> no more clicks. He may pipe in to revise or extend my remarks..
>
> My stock L98 injectors in the TPI 383  run 11+ ms w/ 48 psi fuel pressure
at
> idle, vac off. (just notes for comparison)
>
>
> To the question... at 6000 RPM, it is 20 ms, not 10ms between the time an
> intake valve begins to open until THAT intake valve begins to open again.
> (100 crank rotations every second = 50 cam rotations = 50 valve cycles,
but
> you know that) Specifically for the driver configuration on the 730 and
165,
> someone please tell me why 10 ms is considered static. Is it that a driver
> is toggling between 2 banks of injectors and is only able to fire any one
> bank for 10 ms?  I'm sorry to NOT have this clear in my mind after years
of
> twiddling and reading.. but I'd like it clarified one more time please and
> thanks.
>
> PS anyone ever used the pre-88 TPI cold start injector passage for NOS?
>
>
> ----- Original Message -----
> From: Roger Heflin <rah at horizon.hit.net>
> To: <gmecm at diy-efi.org>
> Sent: Thursday, August 17, 2000 5:34 PM
> Subject: Re: Ford injectors
>
>
> > On mine I swapped 22lb GM (93 f-body LT1) out for 30lb ford svo
> > injectors mainly because I was concerned about not having enough fuel,
> > and according to the kind of pulsewidths I was running on the 30lb
> > injectors (7.3ms) I would have required 9.9ms (at 6000rpm-well past
> > lockup of around 9ms) and would not have had enough fuel.  I may also
> > have been a bit on the lean side at 7.3ms on the 30lb injectors.
>
>
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