[Diy_efi] : tuned port manifolds

[Bruce]

At that stage he has a gas turbine engine with a diesel attached <g>.
Ugh, the plenum on *our* new engine will be very clever <G>.

While the headers, may or may not be critical in your application the plenum
area, is, and changing it may take rather large AE and PE changes.
Changing the plenum on my GN meant adding 8% more fuel (at WOT).

BTW, you might not want to even know what he has in turbos if he's running
something like trick Holsets.
Bruce


----- Original Message -----
From: "Jesse Ruppel" <ruppeljw at capital.net>
To: <Diy_efi at diy-efi.org>
Sent: Tuesday, May 14, 2002 10:18 PM
Subject: RE: [Diy_efi] : tuned port manifolds


> Interesting that you say that, there is a guy a mile up the road from me
> that has a superstock tractor.  He pulls all over the east side of the
> country, his name is Burt Stannard, and the tractor is "Determination".  I
> spent the other day at his place un-detuning my friends 12V Cummins in his
> Dodge.  He runs a 1466 with 4 (very large) turbos, and normally runs
around
> 230 psi of boost (on a near stock bottom end).  After talking with him for
a
> while it became very obvious that he had no clue what he was talking about
> from the analytical side of things, but he had tried enough to know what
> works and what leaves holes in the pistons.  He has built numerous tubular
> headers and has a billet intake manifold.  He has found the tubular
headers
> to work best, but I suspect in this case it helps because the mass flow
rate
> is vastly greater than the OEM manifold was designed for.  The pile of
> stainless tubing in the shop from trying various turbo setups was scary.
> Very neat to see the thing if nothing else though, the money he spends in
a
> year must be insane....  He was working on getting a 2-speed in the thing
> when I was there.
>
> Jesse Ruppel
> ruppeljw at capital.net
>
> 87T Supra
> 87T 4x4 Pickup
>
> > -----Original Message-----
> > From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org]On
> > Behalf Of Bruce
> > Sent: Tuesday, May 14, 1996 6:02 PM
> > To: Diy_efi at diy-efi.org
> > Subject: Re: [Diy_efi] : tuned port manifolds
> >
> >
> >
> > ----- Original Message -----
> > From: "Jesse Ruppel" <ruppeljw at capital.net>
> > Subject: RE: [Diy_efi] : tuned port manifolds
> > > > -----Original Message-----
> > > > From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org]On
> > > > Behalf Of Bruce
> > > > Turbo at mid engine, large heavy cast manifolds.
> > > > If they have a dual scroll housing then use it.
> > > > Turbos are about heat.  All them pretty headers and such have huge
> > amounts
> > > > of suface area, and radiate lots of heat that could be used by the
> > turbo.
> > > > If you have a stock cast manifold, might just really smooth it up
> > > > to reduce it's surface area, and use that.
> > > > Bruce
> >
> > > This is an excellent point that I did have in the back of my head, but
I
> > > wasn't quite sure if the heat or pressure dominated.
> >
> > If you're really into investigating this, might hit a few tractor
> > pulls, and
> > get a pit pass.  Often they keep the engine covers down when in public,
> > there are some interesting ideas.   While a diesel puller might seem
> > prehistoric, some of em old farmers take pulling really
> > seriously, and while
> > they haven't read Heywood, have built numerous combinations of things,
> > trying to find out what works for them.   And some put like $25K into
that
> > dumb ol engine.   FWIW, Alan Locheeds program calls for out
> > tractor to run 2
> > 1/4 - 2 1/2" ID Headers (436 CID, 60 PSI Booost), we're kinda
> > stuck at using
> > the 1 3/4" square stock log manifold.   I've also seen an identical
engine
> > to ours, with 2 1/4" headers, just not have any low end.
> > Admittedly we run
> > just the opposite of what you do.  We start at 6K, but must be able to
> > pull-down to lower rpm to get a full pull where as you start at a
> > lower rpm
> > and have to build from that.
> >    I'm also running a 60 series turbo on my 3.8 v6 and more
> > wouldn't be too
> > much to handle.   2/3s of the reasons people say it won't work is
> > from some
> > one who had poor tuning skills not being able to get a given combo
right.
> > Bruce



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