Holley 4D1

[Eidson, Mark]

I have a 700CFM 4Di on a 70 Mustang and it passes emmisions with no
problems.  Has anyone figured out all the fields in the download file?  BTW,
the eev21 software won't run, on my Thinkpad 600.  It gives a divide error
even when run from DOS. Any ideas?  me

-----Original Message-----
From: andy quaas [mailto:realsquash at yahoo.com]
Sent: Tuesday, March 02, 1999 2:40 PM
To: diy_efi at efi332.eng.ohio-state.edu
Subject: Re: Holley 4D1


I had a 900cfm 4Di.  I just bought another one sunday.  They are great
for power and tuneability.  I don't know about emmisions, but they
should be just fine if tuned properly.  The injectors fire
sequentially.  Yes, all 4.  One injector fires, then the next, and so
on.

Andy


---"Eric J. Lilleness" <eric.j.lilleness at boeing.com> wrote:
>
> I'm considering a Holley 4Di for a moderately built Ford 460, about
475 HP.
> 
> My main goal is passing emissions, but I would also like some of the
other
> features of EFI, such as not hitting 2500 RPM when I cold-start the
damn thing
> at 0530 to go to work.......
> 
> As an FYI, I had a shop to the actual motor R&R, but picked all the
components
> myself, as well as porting the heads, so feel free to send questions
on big
> Fords my way.
> 
> Questions:
> 
> (1) How will emissions on a Holley 4Di equipped engine compare to a
factory EFI? 
> 
> (2) Is there a way to insure that (as an example) the front right
injector
> will always be the injector that fires during the #1 cylinder's
intake stroke?
> This would seem to require that the ECU "knows" what cylinder each
ignition
> pulse is intended for.
>  
> (3) If the answer to the above is "no", will emissions be about the
same as, 
> or worse than batch-fired port injection? 
>  
> (4) Is the timing of the injector firing progammable in a manner
similar to 
> ignition advance varying as a function of RPM? 
>  
> (5) Iv'e heard a few love/hate stories on Holley EFI; but how are
their
> current products, especially the 4Di?
> 
> 		Thanks, Eric
> 

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