mark@noakes.com wrote:
>
> >From what I've heard the TBI setups don't get the same gas mileage as the
>port injection. . .and I don't know why there would be that difference, except
>for maybe the level of fuel atomization. You're right on the retro look;
>however, part of the secret to the TPI engines is that the long runners on the
>intake is what gives you good low end torque. My vette only idles along at
>1900 rpm at 75 mph; most engines couldn't handle that kind of gearing well.
>
> PS--I have an orginal 3 speed manual with the orginal overdrive unit bolted
>on it. The final drive when using this on a 3.90 rear end is a 2.73.
>
> Mark
>
> On Sat, 01 December 2001, Kirk wrote:
>
> >
> > Mark,
> >
> > Is your 3 speed od a manual or automatic?
> >
> > Also, I'm thinking the TBI would be much easier to make look "retro"
> > because it could sit on one of the 283 style (oil filler in the
> > manifold) intakes. That is what I have in mind. I have located an oil
> > bath intake that would be dandy if it will fit the throat of a TBI...
> > and if I can figure out how to put a paper element into it.
> >
> > Mark Noakes wrote:
> > >
> > > I've mentioned before on the list that my 350 TPI V8 Corvette gets 28 mpg
>at 75 mph on the highway. It has 2.73 gears behind a 700R4 and so it turns
>about 1800 rpm at the same 75 mph. It weighs about 3600 lbs. The trucks
>weigh, what, maybe 4600 lbs? A rule of thumb I remember from my econo vehicle
>engineering days is that, every thing else being equal, that each additional
>300 lbs costs you about 1 mpg.
> > >
> > > I also have an 86 1/2 ton Chevy Silverado pickup with a 305, lockup
>torque converter automatic, and 2.73 gears. When it was new and back when the
>speed limits were 55 mph, I regularly got 21-22 mpg on the highway when I put
>the cruise control on 55 mph.
> > >
> > > My guess is that a TF truck with a 350 setup for low end torque (as in
>the TPI engines) instead of high rpm hp with the right gearing could get 22-24
>mpg at 60 mph (before aerodynamics kicks in).
> > >
> > > My initial setup on the Suburban will be a non FI 350 retro'd to look
>like the old 283. With the 3 speed OD, the 3.90 will have a 2.73 final ratio,
>same as both my 86 vette and 86 pickup. If I can ever figure out how to make
>a TPI setup look retro, I will probably try that as well. In non FI mode, I'm
>hoping for 18-20 mpg; in TPI mode, I would be expecting a couple of mpg better
>than that.
> > >
> > > Mark Noakes
> > > 58/56 Chevy Suburban
> > > 59 GMC Suburban
> > > Knoxville, TN
> > >
> > > On Fri, 30 November 2001, "Mike " wrote:
> > >
> > > >
> > >
> > > > Well, personally I don't think you'll see that kind of milage with a V6
>in
> > >
> > > > one of these trucks.
> > >
> > > >
> > >
> > > > Take a look at the MPG figures for the new full size V6 (injected, etc)
> > >
> > > > and expect a bit less than they get.
> > >
> > > >
> > >
> > > > I think a correctly geared and OD'ed 350 with fuel injection could get
>in
> > >
> > > > the low 20's for MPG.
> > >
> > > >
> > >
> > > > Just my .02:)
> > >
> > > >
> > >
> > > > Mike
> > >
> > > >
> > >
> > > >
> > >
> > > >
> > >
> > > > > [Original Message]
> > >
> > > > > From: <ldfinley@juno.com>
> > >
> > > > > To: <oletrucks@autox.team.net>
> > >
> > > > > Date: 11/30/01 11:32:29 AM
> > >
> > > > > Subject: [oletrucks] Fuel Injected V-6
> > >
> > > > >
> > >
> > > > > Hi All,
> > >
> > > > >
> > >
> > > > > Has anybody out there experimented by pulling out their old 216 or 225
> > >
> > > > > and putting in a small to midsize V-6 with fuel injection attached to
>an
> > >
> > > > > automatic overdrive tranny. I'd like to upgrade, but I am thinking
>ahead
> > >
> > > > > of the next time gas goes over $2.00+/gal.
> > >
> > > > >
> > >
> > > > > I'm thinking of a 3.0 Liter F**d or a similar GM product replacement.
> I
> > >
> > > > > know a lot of us like the venerable 350, but my experience with them
>is
> > >
> > > > > that they are somewhat thirsty, except when parked. I think it would
>be
> > >
> > > > > grand to get 25 to 30 mpg as we cruise along, lookin good.
> > >
> > > > >
> > >
> > > > > Any suggestions or admonitions?
> > >
> > > > >
> > >
> > > > > Thanks!
> > >
> > > > >
> > >
> > > > > Larry
> > >
> > > > > 1951 3100
> > >
> > > > > OKC, OK
> > >
> > > > > ________________________________________________________________
> > >
> > > > > GET INTERNET ACCESS FROM JUNO!
> > >
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> > >
Mark,
We have a very similar setup. My '57 has a 283, 3 speed manual, 3.90
gears, and I scoured local junkyards to get two overdrive units. Had a
tranny shop put the best parts together to get a 3 speed overdrive.
Question... how is your overdrive shifting accomplished?
I did not get the parts to hook to the accelerator so have been using a
switch mounted on the gearshift lever. Thinking of getting an overdrive
button from a Ford Explorer that goes on the gearshift knob and building
a new knob containing the button to accomplish the shift. This
particular switch toggles on/off.
> > > > > Join Juno today! For your FREE software, visit:
> > >
> > > > > oletrucks is devoted to Chevy and GM trucks built between 1941 and
>1959
> > >
> > > >
> > >
> > > >
> > >
> > > > --- Mike
> > >
> > > > --- passnb4u@earthlink.net
> > >
> > > > oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
> > > oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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