2.5L Iron Duke MPFI conversion.

[Bruce]

> I'm playing catch-up with the group and I have a little input on this
thread
> because of the death of Smokey Yunick this past weekend.  In the early
> '80's, Smokey was doing research on what he called the "Hot Air Engine".
It
> was the kind of work that a group like this would really appreciate.  I'll
> save the discussion of his technique later, but engine that he used in his
> research and fabrication was no other than the Iron Duke (151 cid) is
> relevant.  He chose the Iron Duke made by Pontiac because he wanted to use
a
> 4-cylinder engine and, although not widely known, the Iron Duke was the
most
> successful engine in automotive racing history (at the time).  I don't
know
> where he got his information, but he is (was) one of the most respected
> engine builders and have no reason to question his facts.
>
> Also, there is some confustion about the 301 and it's history.  From what
I
> understand, the Iron Duke was the basis of it - not the other way around.
> Pontiac liked the success of the Iron Duke and they believed they could
make
> an awesome V-8 by simply doubling it.  They weren't modifying a Pontiac
350,
> but a 151 (yes, the math works out that it should be a 302, but I suppose
> that Ford and Chevy already had a 302, so they called it a 301).
>
> This engine might be a very good engine to play around with for efi
> projects, especially if you wanted to run a turbo.
>
> Incidently, I owned a '79 301-4V in a Firebird with a 4-speed and had much
> fun.  I outran many a Camaro with a 350 and auto trans.  I still have one
> sitting on an engine stand.
>
> Joe
>
> ----- Original Message -----
> From: "Len Sabatine" <sabatine at epix.net>
> To: <gmecm at diy-efi.org>
> Sent: Saturday, April 07, 2001 6:34 PM
> Subject: Re: 2.5L Iron Duke MPFI conversion.
>
>
> >      Weeell , A 301 Pontiac was a VERY Scaled down 350 Pontiac V8 with
> >      strange paired off Siamese ports , a Qjet with secondaries cast
shut
> >      non counterweighted crank, thin wall cast block, etc. They offered
a
> >      Turbo Version , that at least ran somewhat like a V8. [ Late
70's ].
> >      Loosley put, one could call the Iron Duke [ 2.5] 1/2 of a 301 by
the
> math.
> >      Size for size the 2.5 Cylinder head was better than the 301 V8.
> >      [Tech 4 ] designation went with EFI,  and an improved  design Head
.
> >      Back in the 60's , Pontiac had a slant 4 in a Tempest , that design
> > may have
> >      been closer to it's V8 brethren of that time period. [ In
> comparison ]
> >      Bottom line, the 301 and Iron Duke  weren't derived from the same
> sheet of
> >      paper IMO.
> >
> >      Len
> >
> > >We're probably getting OT here, but I was of the impression that the
> > >"Iron Duke", "Tech 4", or whatever else you want to call it, was a
"true"
> > >Pontiac motor.  The way I had understood the story, in the 70s, Pontiac
> > >made a 4-cylinder and 8-cylinder version of essentially the same motor.
> > >The V-8 was the 301 CID, the 4-banger was the Iron Duke.  Not true?
> > >
> > >  On Fri, 6 Apr 2001, Len Sabatine wrote:
> > >
> > > >      Tracing the design to the beginning . '62 Chevy II,  as 153
CID.[
> > > > 3.875 x 3.250 ]
> > > >      non x flow head. When Pontiac took it over it became  151
> ID[ 4.00 x
> > > > 3.00] .
> > > >      The 153 was popular in a Midget class with a ? Sesco Head.
> > > >      Len
> > > >
> > > > >69 is the earliest that I know of, when it was installed in Novas.
I
> > > > >don't know if
> > > > >it was used prior to that, but I wouldn't be surprised to find out
it
> was.
> > > > >
> > > > >Shannen
> > > > >
> > > > >
> > > > >ae2598 at wayne.edu wrote:
> > > > > >
> > > > > > How long as the Iron Duke been around?  I thought it was first
> built
> > > > > > around '75/'76..
> > > > > >
> > > > > > On Thu, 5 Apr 2001, Shannen Durphey wrote:
> > > > > >
> > > > > > > Ihe intake and exhaust on the real iron duke (from 60's and
> 70's)
> > > was
> > > > > on the same
> > > > > > > side.  Later 2.5l engines used a cross flow head.  The intake
is
> on
> > > > > the right (rear
> > > > > > > in FWD apps) and exhaust on the left.
> > > > > > > But the engines are tbi.
> > > > > > > Shannen
> > > > > > >
> > > > > >
> > > > > >
> > > > >
> >
>
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