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<p>Steve.. :<br>
I think that is what I meant. There is just not enough room
inside a V Block to get the stroke for the torque that an inline
six can provide. However, when you take a 6 cyl pver 2200 RPM
you induce either vibrations in the rotating parts, or something
in the mechanical fuel pump and injectors that goes haywire.
Perhaps the pulses in the injector lines creates waves that get
out of time. When Cat came out with the HEUI system engines could
go to higher RPM. I think that is because the injectors could
work faster and the fuel was taken to so much higher pressures.
The HEUI injectors are compressing the fuel right at the
cylinder. A V style engine could run at a much higher RPM due to
the HEUI system. I am not a big fan of a computerized system, but
the 7.3 Power Stroke engines were some of the greatest in my
opinion. <br>
</p>
<p>Cecil<br>
</p>
<div class="moz-cite-prefix">On 7/12/2021 7:52 AM, Stephen Offiler
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAP6upcjni9T4LD5FFW_+LW_kXsSorswpi=bCOD=KrKu9x+yvnw@mail.gmail.com">
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<div dir="ltr">Heavy-duty diesels are typically designed for high
"torque rise" which is a torque curve peaking at low RPM and
dropping significantly from there to the rated/redline RPM.
This creates an engine that responds to increasing loads by
slowing down a bit which puts you onto a higher-torque portion
of the curve. Most of this characteristic is obtained with cam
profiles, compression ratios, and bore:stroke ratios. None of
the torque rise characteristic depends directly on the cylinder
configuration. In fact the inline-6 is the smoothest possible
configuration with perfect primary and secondary balance.
Larger bores will produce higher torque from a given combustion
pressure, which means larger/heavier pistons, and the inline-6
is kind of a neat way to "cheat" and get a smooth running engine
despite the large heavy pistons. I guess I'm saying engines
built for torque may end up being inline engines, which is the
converse of what Cecil said.
<div><br>
</div>
<div>SO</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, Jul 10, 2021 at 8:53
PM Cecil Bearden <<a href="mailto:crbearden@copper.net"
moz-do-not-send="true">crbearden@copper.net</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<p>2200 RPM is the top RPM of an inline diesel. Inline
engines were built for torque, not speed. I think part
of the problem was the mechanical pumps. at high speeds
the fuel in the injector lines sets up waves and misfire
resulting in bent rods, burned pistons, etc. HEUI helped
to solve that. That 426 engine is a great engine in the
7030, at 136 hp...<br>
Cecil<br>
</p>
<div>On 7/10/2021 5:45 PM, magreer67 wrote:<br>
</div>
<blockquote type="cite">
<div dir="auto">Ditto that on the AC 8070. My brother in
law has one and the 426 in it was a problem child
engine. He repowered it with an 8.3 Cummins and now it
has plenty of power and is finally reliable.</div>
<div dir="auto">Mark Greer </div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div id="gmail-m_-5297972876903281733composer_signature"
dir="auto">
<div style="font-size:85%;color:rgb(87,87,87)"
dir="auto">Sent from my Verizon, Samsung Galaxy
smartphone</div>
</div>
<div dir="auto"><br>
</div>
<div><br>
</div>
<div dir="auto" style="font-size:100%;color:rgb(0,0,0)"
align="left">
<div>-------- Original message --------</div>
<div>From: Cecil Bearden <a
href="mailto:crbearden@copper.net" target="_blank"
moz-do-not-send="true"><crbearden@copper.net></a>
</div>
<div>Date: 7/10/21 9:23 AM (GMT-05:00) </div>
<div>To: <a href="mailto:at@lists.antique-tractor.com"
target="_blank" moz-do-not-send="true">at@lists.antique-tractor.com</a>
</div>
<div>Subject: Re: [AT] Questions on a 1975? Allis 7030
and 7050 </div>
<div><br>
</div>
</div>
<p>Steve:</p>
<p>I noticed that and it is the same tractor up to 200 hp
with turning up to 2550 rpm and the intercooling. The
8070 gave Allis a bad name as the engines were coming
apart at the higher RPM around here..<br>
Cecil</p>
<p><br>
</p>
<div>On 7/10/2021 5:17 AM, Stephen Offiler wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">I know nothing about these tractors,
Cecil, but got curious enough to check Tractordata.
The 7030 is listed as turbocharged while the 7050 is
listed as turbocharged and intercooled. Looks like
they turned up the turbo boost.
<div><br>
</div>
<div>SO</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div class="gmail_attr" dir="ltr">On Fri, Jul 9, 2021
at 6:58 PM Cecil Bearden <<a
href="mailto:crbearden@copper.net" target="_blank"
moz-do-not-send="true">crbearden@copper.net</a>>
wrote:<br>
</div>
<blockquote style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex"
class="gmail_quote">
<div bgcolor="#FFFFFF">
<p>Just a note, the 7060 is the same tractor, but
shows 192hp.. <br>
</p>
<p>Cecil<br>
</p>
<div>On 7/9/2021 4:40 PM, Cecil Bearden wrote:<br>
</div>
<blockquote type="cite">
<p>I have a 7030 Allis that needs a power
director clutch seal even though it still runs
and pulls. A friend has found a 7050 of
about the same year. Tractor date shows the
7050 having 156+Hp and the 7030 130+/- hp.
The engine is the same 426 cu in engine. Both
engines are turning the same 2300 rpm. Did
they turn the pump up? My old 7030 will leave
a smoke plume that can be seen 5 miles
away!!! Maybe the pump was turned up on it.
I think I might get the 7050 and just switch
some tires & wheels. That 426 engine os a
real stump puller. I wish I could put it in a
truck somehow... <br>
</p>
<p>Cecil<br>
</p>
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