Easiest-to-tune injector type in the 60# range?
06-02-2010, 09:16 PM
#1
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Easiest-to-tune injector type in the 60# range? The blower truck needs bigger injectors (7 liter aluminum
block, about 10# of boost, I figure 60# ought to be about
right).
Anybody got a happy story about injectors with the right
spray pattern and not so much short pulse fiddling needed?
Manifold referenced fuel pressure setup ought to help to
mellow out the low end some but it'd be nice to not have
crazy-different offsets and so on.
Mechanical differences are not an issue I guess, the rails
are likely to be swapped out anyway.
block, about 10# of boost, I figure 60# ought to be about
right).
Anybody got a happy story about injectors with the right
spray pattern and not so much short pulse fiddling needed?
Manifold referenced fuel pressure setup ought to help to
mellow out the low end some but it'd be nice to not have
crazy-different offsets and so on.
Mechanical differences are not an issue I guess, the rails
are likely to be swapped out anyway.
06-03-2010, 10:44 AM
#2
I've played with quite a bit of injectors and I have to say that the siemens 60#er's are very nice and easy to tune! I have a set running on my 403 NA on stock Fbody fuel system with a single Walbro GSS340 and they are very easy to make idle. AFR's stray very slightly from time to time at low pulsewidths but it's very minimal in the +/-0.02 Lambda.
I later plan on running a return style fuel system with a little lower pressure at 43psi instead of 58-60 and reference it to manifold pressure as well. I think it will bring my pulsewidths up some more at WOT to help with atomizing the air fuel mixture.
I later plan on running a return style fuel system with a little lower pressure at 43psi instead of 58-60 and reference it to manifold pressure as well. I think it will bring my pulsewidths up some more at WOT to help with atomizing the air fuel mixture.
06-03-2010, 09:09 PM
#3
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Agree on the SD 60# injectors. I put them on my stockish LT1 Caprice with E85 shortly before installing the 24x conversion and 0411 PCM. They work like a charm in both cases. They cleanly idle right down to under 1mS without issue. Even with E85 at 59 psi, my 6000 RPM WOT duty cycle is only in the 51% range.
Greg Banish supplies the data for the Gen III PCM, both in HP Tuners and EFI Live formats, on his instructional DVD. I used that to generate the data for the LT1 PCM, which was kind of a pain...but still far less painful than trying to derive it from scratch.
Greg Banish supplies the data for the Gen III PCM, both in HP Tuners and EFI Live formats, on his instructional DVD. I used that to generate the data for the LT1 PCM, which was kind of a pain...but still far less painful than trying to derive it from scratch.
