fordtrucks-digest Digest V97 #134

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fordtrucks-digest DigestVolume 97 : Issue 134

Today's Topics:

Re: Bronco 3/4 ton axle conversion ["Gary, 78 BBB" ]
RE: 460 engine [Kevin Kemmerer ]
ENGINE BRACKETS NEEDED [Lavon-Ackley

worldnet.att.net ]
Gas splashing back out of 1974 F250 [Keith Srb ]
Ranger XLT where does it fit in mode [Keith Srb ]
XTL door panel ["art l" ]
RE: 460 engine ["Gary, 78 BBB" ]
Re: ENGINE BRACKETS NEEDED ["Gary, 78 BBB" ]
Re: Gas splashing back out of 1974 F ["Gary, 78 BBB" ]
Re: XTL door panel ["Gary, 78 BBB" ]
Re: ENGINE BRACKETS NEEDED [Kevin Lindstedt
Re: ENGINE BRACKETS NEEDED [John Macnamara ]
typo: 4X4 PRICE [BigDogF250

aol.com ]
Re: ENGINE BRACKETS NEEDED - Reply [Glen Pace ]
Re: 1960 PANEL/DELIVERY [BigDogF250

aol.com ]
Re: ENGINE BRACKETS NEEDED [Lavon-Ackley

worldnet.att.net ]
Re: ENGINE BRACKETS NEEDED [Lavon-Ackley

worldnet.att.net ]
Re: ENGINE BRACKETS NEEDED - Reply [Lavon-Ackley

worldnet.att.net ]
Gauge theory 101... [sdelanty

sonic.net ]
Re: ENGINE BRACKETS NEEDED - Reply [John Macnamara ]

Administrivia:

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------------------------------

Date: Thu, 31 Jul 1997 10:11:24 +0000
From: "Gary, 78 BBB"
To: fordtrucks

lofcom.com
Subject: Re: Bronco 3/4 ton axle conversion
Message-Id:
Content-Type: text/plain; charset=US-ASCII
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> Date: Thu, 31 Jul 1997 06:59:09 -0700
> From: John Macnamara
> Subject: Re: Bronco 3/4 ton axle conversion

> Gary: My 78 F250 4X4 has dual piston front calipers. The truck is
> rated at 8500 GVW, so if this helps the discussion.

I wonder if they fit the same mount frame as the f-150 and broncos?
In other words are they interchangeable with them?

My wife's gona kill me if I come dragin another old vehicle in the
yard :-( but I don't see any cheaper or better way to get to the
bottom of all this. Guess I better get the barn done first tho :-)

My brakes are sooooooooooooooooooo baaaaaaaaaaaaaaaaaad! :-(

-- Gary Peters --

(Mine)78 F-150, 2wd, 460, C-6
(Mine)78 Bronco, 4wd, 351M, Np 435, Np 205, 33's
(Daughter's)92 Tempo
(Daughter's)92 T-Bird
(Wife's)94 T-Bird
(Son's)90 F-150, I6
(Son's)76 Blue Bird School bus
All mine to work on, maintain etc..

------------------------------

Date: Thu, 31 Jul 1997 11:00:18 -0400
From: Kevin Kemmerer
To: "'fordtrucks

lofcom.com'"
Subject: RE: 460 engine
Message-ID:
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

maybe, and some chevy sizes can fit also. there are custom sizes =
available from places like aries etc. but most of the time i have seen =
engine blocks that needed boring, 0.010" more wouldn't clean up the =
bores enough - i think it is safe to assume that without drastic =
measures (cementing, sleeving) 460 blocks really only have two chances =
for being bored out. only if one is lucky could the 040 over be used, =
and for a short life motor 090 over may work with only a smal amount of =
water jacket cement.
do you know who sells 040" over? i do not see them in summit catalog or =
the ford motorsports catalog.

sleddog

----------
From: Don Grossman[SMTP:duckdon

pacific.net]
Sent: Wednesday, July 30, 1997 10:53 PM
To: fordtrucks

lofcom.com
Subject: Re: 460 engine

>=20
> well, if .030 over then it has only one more life left (.060 over) =
after this one! generally a 71 is good, deck height changed over the =
years, but that really doesn't change much except for the guys who =
stroke the thing to 512 or more cubes. the heads are more important, 68 =
to 70 is really good, 71- 73?, good, 74 on is ok. many parts don't =
interchange between the 68-69 blocks and later blocks especially on the =
front of the block.
>=20
> sleddog

Hey sleddog, I think they still make a .040 over piston to make it a
468 :-]

--=20
Don Grossman
duckdon

pacific.net

63 Ford F-250 4x4 67' 390, t-98, Spicer 24, Dana 60, Dana 44

Phase 172: rebuild front suspension

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------------------------------

Date: Thu, 31 Jul 1997 11:09:03 -0400
From: Lavon-Ackley

worldnet.att.net
To: FORD TRUCKS
Subject: ENGINE BRACKETS NEEDED
Message-ID:
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

I'm looking for the engine brackets (bolts to the frame) for a 1976-1979
Ford F150 that had a 460 in it. I'm replaceing a 360 in my 1974 with a
1976 460. If anyone knows where a set of brackets are, please let me
know. I'm doing a frame-up on the truck ( my first restoration). Thanks
ahead of time for any help you can be.

------------------------------

Date: Thu, 31 Jul 1997 07:55:04 -0700
From: Keith Srb
To: "'fordtrucks

lofcom.com'"
Subject: Gas splashing back out of 1974 F250 filler tube.
Message-ID:
Content-Type: text/plain; charset="us-ascii"
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HI all,

On my 74, it is almost impossible to fill the tank with gas without some of
splashing back out of the filler tube. If I an not careful, I get gas all over
my shoes, etc, not to mention having the gas run down the side of the box, not
good on paint. Does any body know how to fill this thing with gas without it
splashing back out??

This truck has dual tanks, both mounted under the bed, between the frame rails.
The gentlemen I bought the truck did not use the Aux Tank, he just used the
main tank. I would like to use both tanks, but am wondering what I should do
to this tank before I start using it. Does anyone have any suggestions??

Keith Srb
1986 Ford Bronco II, 2.9L (I HATE LITERS) V-6, Mitsubishi 5-Speed.
1980 Harley Davidson, XLH, Rebuilt from the frame up.
1974 Ford F250 Ranger XLT, 390ci 4bbl, Automatic, Long Box, Style Side.
1966 Ford F100, 240 C.I. Straight Six, Warner T-18 4-Speed, Short Box.
My Blood runs "TRUE BLUE FORD on Four Wheels and Pure HARLEY on Two Wheels!"

------------------------------

Date: Thu, 31 Jul 1997 07:57:59 -0700
From: Keith Srb
To: "'fordtrucks

lofcom.com'"
Subject: Ranger XLT where does it fit in model line?
Message-ID:
Content-Type: text/plain; charset="us-ascii"
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Hi all,

I know someone already answered this question, but I must of deleted the
answer. Where does the Ranger XLT fit in 74 model line.

Keith Srb
1986 Ford Bronco II, 2.9L (I HATE LITERS) V-6, Mitsubishi 5-Speed.
1980 Harley Davidson, XLH, Rebuilt from the frame up.
1974 Ford F250 Ranger XLT, 390ci 4bbl, Automatic, Long Box, Style Side.
1966 Ford F100, 240 C.I. Straight Six, Warner T-18 4-Speed, Short Box.
My Blood runs "TRUE BLUE FORD on Four Wheels and Pure HARLEY on Two Wheels!"

------------------------------

Date: Thu, 31 Jul 1997 08:11:52 -0700
From: "art l"
To:
Subject: XTL door panel
Message-Id:
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

I have a 78 F-250 Ranger XLT, I am looking for door panels. Ford says they
can no longer get the XLT panels, are there any companies making
reproductions of these?
Art Lutz
78 F-250 4X4 400m

------------------------------

Date: Thu, 31 Jul 1997 11:53:45 +0000
From: "Gary, 78 BBB"
To: fordtrucks

lofcom.com
Subject: RE: 460 engine
Message-Id:
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7BIT

> From: Kevin Kemmerer
> Subject: RE: 460 engine
> Date: Thu, 31 Jul 1997 11:00:18 -0400

> chances for being bored out. only if one is lucky could the 040
> over be used, and for a short life motor 090 over may work with only
> a smal amount of water jacket cement. do you know who sells 040"
> over? i do not see them in summit catalog or the ford motorsports
> catalog.

PAW sells whole 460 kit motors for $1700. it's hardly worth
monkeying around with marginal blocks for that price IMHO :-) I
built my first one without boring it at all. Since I wanted to use
forged pistons, I gained enough clearance to clean it up with only a
few witness marks and stay within spec. THIS IS NOT RECOMMENDED, I
was on a tight budget and wanted to keep the walls as thick as
possible. By honing them myself I saved the boring charges and had
lots of fun but I don't recommend this approach. The .030 over
pistons can be cleaned up and used again, the stock size ones cannot
so it wasn't really much of a bargain.

Junk yards have 460's all over the place for $50 and up. Just go get
a once around engine and use the spare parts to build your's if you
want to do it all yourself but remember that if you see more than
.004" out of round at the bottom of the bores it's an indication that
the block is unstable and may not be a good bet for a rebuild.
(I understand Ch---y's are more prone to that than the 460's) :-)

You can get a high tech SVO aluminum block for $4500 which will go
all the way up to 600" and beyond safely. Since it's sleeved, you
can replace the cylinders as often as you like and use your pistons
over and over (till the skirts get too worn down)

SVO also has the stock blocks for around $1000 as I recall (don't
have my catalog in front of me)

-- Gary Peters --

(Mine)78 F-150, 2wd, 460, C-6
(Mine)78 Bronco, 4wd, 351M, Np 435, Np 205, 33's
(Daughter's)92 Tempo
(Daughter's)92 T-Bird
(Wife's)94 T-Bird
(Son's)90 F-150, I6
(Son's)76 Blue Bird School bus
All mine to work on, maintain etc..

------------------------------

Date: Thu, 31 Jul 1997 12:00:01 +0000
From: "Gary, 78 BBB"
To: fordtrucks

lofcom.com
Subject: Re: ENGINE BRACKETS NEEDED
Message-Id:
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7BIT

> From: Lavon-Ackley

worldnet.att.net
> Date: Thu, 31 Jul 1997 11:09:03 -0400
> Subject: ENGINE BRACKETS NEEDED

> I'm looking for the engine brackets (bolts to the frame) for a
> 1976-1979 Ford F150 that had a 460 in it. I'm replaceing a 360 in my
> 1974 with a 1976 460. If anyone knows where a set of brackets are,
> please let me know. I'm doing a frame-up on the truck ( my first
> restoration). Thanks ahead of time for any help you can be.

If you mean the stanchions, I don't think it's enough. L&L makes
mounts for almost any swap for $99 which bolt in to the original
stanchions or frame rail mount pads. The 360 is an FE engine which
is totally different from the 385 series. I don't believe the 460
was ever offered in the F-150's (but I could be wrong there) so no
easy OEM mounts are available. L&L has a good rep from what I'm
hearing.

-- Gary Peters --

(Mine)78 F-150, 2wd, 460, C-6
(Mine)78 Bronco, 4wd, 351M, Np 435, Np 205, 33's
(Daughter's)92 Tempo
(Daughter's)92 T-Bird
(Wife's)94 T-Bird
(Son's)90 F-150, I6
(Son's)76 Blue Bird School bus
All mine to work on, maintain etc..

------------------------------

Date: Thu, 31 Jul 1997 12:27:33 +0000
From: "Gary, 78 BBB"
To: fordtrucks

lofcom.com
Subject: Re: Gas splashing back out of 1974 F250 filler tube.
Message-Id:
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7BIT

> From: Keith Srb
> Subject: Gas splashing back out of 1974 F250 filler tube.
> Date: Thu, 31 Jul 1997 07:55:04 -0700

> On my 74, it is almost impossible to fill the tank with gas without
> some of splashing back out of the filler tube. If I an not careful,
> I get gas all over my shoes, etc, not to mention having the gas run
> down the side of the box, not good on paint. Does any body know how
> to fill this thing with gas without it splashing back out??

All my trucks have had a filler neck with a metal vent tube welded
the side and attached to a 3/4" hose which either goes to the top or
the side near the top of the tank for venting. If this hose is
twisted, kinked, pinched or collapsed you won't get proper venting.

At some point some genius decided we needed an air space in the tank
to prevent hydrostatic pressure from bursting a seal when they
decided to seal them up for emissions reduction. These tanks are
harder to fill up and I've given up on trying anymore but I've found
that by moving the handle around a bit I can get an angle that the
filler neck likes so it will fill to the top of the vent tube in the
tank with no events to irritate me. Once it stops, I quit trying.

74 is right in there where all this started so you could have either
type. If you have the charcoal cannister you probabley have the
sealed tank system as well.

-- Gary Peters --

(Mine)78 F-150, 2wd, 460, C-6
(Mine)78 Bronco, 4wd, 351M, Np 435, Np 205, 33's
(Daughter's)92 Tempo
(Daughter's)92 T-Bird
(Wife's)94 T-Bird
(Son's)90 F-150, I6
(Son's)76 Blue Bird School bus
All mine to work on, maintain etc..

------------------------------

Date: Thu, 31 Jul 1997 12:53:52 +0000
From: "Gary, 78 BBB"
To: fordtrucks

lofcom.com
Subject: Re: XTL door panel
Message-Id:
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7BIT

> From: "art l"
> Subject: XTL door panel
> Date: Thu, 31 Jul 1997 08:11:52 -0700

> I have a 78 F-250 Ranger XLT, I am looking for door panels. Ford
> says they can no longer get the XLT panels, are there any companies
> making reproductions of these? Art Lutz 78 F-250 4X4 400m

Dennis Carpenter makes reproductions for many parts in this vintage:

704-786-8139

It's not in the catalog I have but it says to call since some parts
aren't listed apparently.

I found several custom panel companies on the web as well who claim
to be able to make custom fit but not origianl design panels for this
vintage.

-- Gary Peters --

(Mine)78 F-150, 2wd, 460, C-6
(Mine)78 Bronco, 4wd, 351M, Np 435, Np 205, 33's
(Daughter's)92 Tempo
(Daughter's)92 T-Bird
(Wife's)94 T-Bird
(Son's)90 F-150, I6
(Son's)76 Blue Bird School bus
All mine to work on, maintain etc..

------------------------------

Date: Thu, 31 Jul 1997 14:33:48 +0900
From: Kevin Lindstedt
To: fordtrucks

lofcom.com
Subject: Re: ENGINE BRACKETS NEEDED
Message-Id:
Content-Type: text/plain; charset="us-ascii"

At 12:00 PM 7/31/97 +0000, you wrote:
>> From: Lavon-Ackley

worldnet.att.net
>> Date: Thu, 31 Jul 1997 11:09:03 -0400
>> Subject: ENGINE BRACKETS NEEDED
>
>> I'm looking for the engine brackets (bolts to the frame) for a
>> 1976-1979 Ford F150 that had a 460 in it. I'm replaceing a 360 in my
>> 1974 with a 1976 460. If anyone knows where a set of brackets are,
>> please let me know. I'm doing a frame-up on the truck ( my first
>> restoration). Thanks ahead of time for any help you can be.
>
>If you mean the stanchions, I don't think it's enough. L&L makes
>mounts for almost any swap for $99 which bolt in to the original
>stanchions or frame rail mount pads. The 360 is an FE engine which
>is totally different from the 385 series. I don't believe the 460
>was ever offered in the F-150's (but I could be wrong there) so no
>easy OEM mounts are available. L&L has a good rep from what I'm
>hearing.
>
>-- Gary Peters --
>
I've got a 460 in my 1978 F150 (original equipment) don't know about other
years...

Kevin

------------------------------

Date: Thu, 31 Jul 1997 13:01:00 -0700
From: John Macnamara
To: fordtrucks

lofcom.com
Subject: Re: ENGINE BRACKETS NEEDED
Message-Id:
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Kevin Lindstedt wrote:
>
> At 12:00 PM 7/31/97 +0000, you wrote:
> >> From: Lavon-Ackley

worldnet.att.net
> >> Date: Thu, 31 Jul 1997 11:09:03 -0400
> >> Subject: ENGINE BRACKETS NEEDED
> >
> >> I'm looking for the engine brackets (bolts to the frame) for a
> >> 1976-1979 Ford F150 that had a 460 in it. I'm replaceing a 360 in my
> >> 1974 with a 1976 460. If anyone knows where a set of brackets are,
> >> please let me know. I'm doing a frame-up on the truck ( my first
> >> restoration). Thanks ahead of time for any help you can be.
> >
> >If you mean the stanchions, I don't think it's enough. L&L makes
> >mounts for almost any swap for $99 which bolt in to the original
> >stanchions or frame rail mount pads. The 360 is an FE engine which
> >is totally different from the 385 series. I don't believe the 460
> >was ever offered in the F-150's (but I could be wrong there) so no
> >easy OEM mounts are available. L&L has a good rep from what I'm
> >hearing.
> >
> >-- Gary Peters --
> >
> I've got a 460 in my 1978 F150 (original equipment) don't know about other
> years...
>
> Kevin
>
> ____________________________________________________________________
> Message distributed via http://www.ford-trucks.com//lc/lc.php?action=do&link=http://www.lofcom.com/
> For help send mail with subject "HELP" to:fordtrucks-request

lofcom.com
> Comments and suggestions are welcome, use: kpayne

mindspring.com

Gary: Randy Collins, another member of this list, has a parts truck.
he probably could help you out. Email to rcollins

micron.net.

Thanks!

John

78 F250 4X4 Supercab
67 GT500
66 427 Corvette

------------------------------

Date: Thu, 31 Jul 1997 16:09:40 -0400 (EDT)
From: BigDogF250

aol.com
To: fordtrucks

lofcom.com
Subject: typo: 4X4 PRICE
Message-ID:

the truck i am looking at is a 75 not a 72 sorry for the mistake you were
right on the supercab.
Matt

------------------------------

Date: Thu, 31 Jul 1997 16:12:53 -0400 (EDT)
From: Glen Pace
To: fordtrucks

lofcom.com
Subject: Re: ENGINE BRACKETS NEEDED - Reply
Message-id:
Content-type: TEXT/PLAIN; CHARSET=US-ASCII

Check with hooker they also have mounts .
I have L&L mounts in my truck and unless you use stock
manifolds
or L&L headers you have to modify the mounts. I have hooker
headers and I had to modify the mounts and the headers to get
them in only to find out later that hooker made mounts.
Good luck
Glen

77 F-250 4x4
96 F-350 4x4

------------------------------

Date: Thu, 31 Jul 1997 16:18:46 -0400 (EDT)
From: BigDogF250

aol.com
To: fordtrucks

lofcom.com
Subject: Re: 1960 PANEL/DELIVERY
Message-ID:

Jerry the 1960 panel truck would make a great looking rod/custom, if your
into that get it its a great buy.
Matt
92 f250 4x4 5.8L

------------------------------

Date: Thu, 31 Jul 1997 16:27:42 -0400
From: Lavon-Ackley

worldnet.att.net
To: fordtrucks

lofcom.com
Subject: Re: ENGINE BRACKETS NEEDED
Message-ID:
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Kevin Lindstedt wrote:
>
> At 12:00 PM 7/31/97 +0000, you wrote:
> >> From: Lavon-Ackley

lofcom.com
> Comments and suggestions are welcome, use: kpayne

mindspring.com
Thanks for the information. The 460 was offered in the 1976 and later
F150's. I've done some homework on this before I bought the engine and
everything I've found said that it will fit as long as the engine
brackets are changed. I've got L&L's number, I'll give them a call.
Thanks
Lavon

------------------------------

Date: Thu, 31 Jul 1997 16:35:43 -0400
From: Lavon-Ackley

worldnet.att.net
To: fordtrucks

lofcom.com
Subject: Re: ENGINE BRACKETS NEEDED
Message-ID:
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

John Macnamara wrote:
>
> Kevin Lindstedt wrote:
> >
> > At 12:00 PM 7/31/97 +0000, you wrote:
> > >> From: Lavon-Ackley

worldnet.att.net
> > >> Date: Thu, 31 Jul 1997 11:09:03 -0400
> > >> Subject: ENGINE BRACKETS NEEDED
> > >
> > >> I'm looking for the engine brackets (bolts to the frame) for a
> > >> 1976-1979 Ford F150 that had a 460 in it. I'm replaceing a 360 in my
> > >> 1974 with a 1976 460. If anyone knows where a set of brackets are,
> > >> please let me know. I'm doing a frame-up on the truck ( my first
> > >> restoration). Thanks ahead of time for any help you can be.
> > >
> > >If you mean the stanchions, I don't think it's enough. L&L makes
> > >mounts for almost any swap for $99 which bolt in to the original
> > >stanchions or frame rail mount pads. The 360 is an FE engine which
> > >is totally different from the 385 series. I don't believe the 460
> > >was ever offered in the F-150's (but I could be wrong there) so no
> > >easy OEM mounts are available. L&L has a good rep from what I'm
> > >hearing.
> > >
> > >-- Gary Peters --
> > >
> > I've got a 460 in my 1978 F150 (original equipment) don't know about other
> > years...
> >
> > Kevin
> >
> > ____________________________________________________________________
> > Message distributed via http://www.ford-trucks.com//lc/lc.php?action=do&link=http://www.lofcom.com/
> > For help send mail with subject "HELP" to:fordtrucks-request

lofcom.com
> > Comments and suggestions are welcome, use: kpayne

mindspring.com
>
> Gary: Randy Collins, another member of this list, has a parts truck.
> he probably could help you out. Email to rcollins

micron.net.
>
> Thanks!
>
> John
>
> 78 F250 4X4 Supercab
> 67 GT500
> 66 427 Corvette
>
> ____________________________________________________________________
> Message distributed via http://www.ford-trucks.com//lc/lc.php?action=do&link=http://www.lofcom.com/
> For help send mail with subject "HELP" to:fordtrucks-request

lofcom.com
> Comments and suggestions are welcome, use: kpayne

mindspring.com
Thanks John. I sent Randy a message. As far as I know the 460 was offerd
in the '76-'79 F150 maybe longer, but these are the years that all have
the same frame as my '74.

------------------------------

Date: Thu, 31 Jul 1997 16:40:39 -0400
From: Lavon-Ackley

worldnet.att.net
To: fordtrucks

lofcom.com
Subject: Re: ENGINE BRACKETS NEEDED - Reply
Message-ID:
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Glen Pace wrote:
>
> Check with hooker they also have mounts .
> I have L&L mounts in my truck and unless you use stock
> manifolds
> or L&L headers you have to modify the mounts. I have hooker
> headers and I had to modify the mounts and the headers to get
> them in only to find out later that hooker made mounts.
> Good luck
> Glen
>
> 77 F-250 4x4
> 96 F-350 4x4
>
> ____________________________________________________________________
> Message distributed via http://www.ford-trucks.com//lc/lc.php?action=do&link=http://www.lofcom.com/
> For help send mail with subject "HELP" to:fordtrucks-request

lofcom.com
> Comments and suggestions are welcome, use: kpayne

mindspring.com

Thanks for the help. Sounds like Hooker would be the way to go.

------------------------------

Date: Thu, 31 Jul 1997 13:37:53 -0700
From: sdelanty

sonic.net
To: FORDTRUCKS

lofcom.com
Subject: Gauge theory 101...
Message-Id:
Content-Type: text/plain; charset="us-ascii"

>> This concept would work if the current was AC, but with the current
>> being DC, it doesn't work.
>
>Apparently you are correct but I'm reasonably sure I remember this
>set up with the red primary wire going through the loop and the
>ammeter working. I don't have a clue at this point why that is but
>will do some research. Darn this stupid curiosity thing anyway!! :-)
>
>It seems that "true" inductance can't happen unless the magnetic
>field produced by the primary wire current is expaned and collapsed
>in succession such as would happen with AC current when the current
>reverses. There are DC clamps to check amperage but I don't know
>how they work, yet. (but I will)

>One theory is that automotive DC is not true DC but pulsating.
>Even though the battery mittigates most of the pulses, there is
>still a readable variation in the values which could be what is
>picked up by the coil, don't know.

O.K., there's been lots of discussion about how current gauges work,
so lets go thru the common styles of current gauges....

The SHUNT type uses a shunt (basically a low resistance, high wattage
resistor, usually trimmed out of flat brass plate.) The shunt is wired
across (in parallel with) the gauge terminals. Current to be measured
is connected through the shunt and the gauge reads some value proportional
to the ratio of shunt resistance to gauge resistance. (the gauge gets
some small percentage of the current and the shunt passes the rest)
These gauges may be used for AC OR DC.

The CURRENT TRANSFORMER type pass AC current to be measured thru a heavy
wire or coil of wire. The wire is passed thru another coil that is
connected to the gauge terminals. (may just be a loop on the back of gauge)
The changing magnetic flux from the AC current in the wire induces a current
in the gauge loop which is measured by the gauge.
The gauge can be made more sensitive by passing the current wire
2 or more times thru the "sensing" loop.
Because You need a changing magnetic flux to induce current, this type
works on AC ONLY.

The MAGNETIC NEEDLE type passes the current to be measured thru a wire
which is passed thru a loop at the back of the gauge. Magnetism from
the current in the wire moves a magnetized needle. Just one magnet
pushing another...
The gauge can be made more sensitive by looping the wire 2 or more
times thru the gauge loop.
NO current is induced into the loop. The loop simply holds the wire in
the right spot. It could be replaced with a rubber band....
Because this type uses an electomagnet to move a permanent magnet, it
works on DC ONLY.

The HALL EFFECT type uses a coil of fine wire which is powered by a
high frequency AC signal provided by a fancy electronic circuit.
The operating frequency is determined in part by the inductance of
the coil.
If the coil is placed near a wire carrying the current to be measured,
the magnetism from the curent to be measured changes the inductance
of the high freq coil, causing a shift in operating frequency
This change of frequency is detected and the amount of change measured
by more fancy electronics and converted to useful numbers.
Hall effect is used in DC current clamp-ons.
Depending on how the circuitry is setup, Hall effect sensors can detect
AC OR DC, or "see" the presence or abscence of metallic objects in
it's vicinity. (Proximity detector) Some ign systems use Hall effect
sensor in the distributor as the pickup instead of a coil and magnets.

There's other types as well and I could go on, but class is dismissed
for today. (-:

FORDTRUCK content: I didn't know that Ford ever used the magnetic needle
type gauges. Learn something new every day.
(err, was that good enough, Ken?)

Happy motoring and may Your gauges always be accurate,

Steve Delanty

1971 F100 shortbox, FE390, T-18 4-speed

------------------------------

Date: Thu, 31 Jul 1997 13:57:54 -0700
From: John Macnamara
To: fordtrucks

lofcom.com
Subject: Re: ENGINE BRACKETS NEEDED - Reply
Message-Id:
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Lavon-Ackley

worldnet.att.net wrote:
>
> Glen Pace wrote:
> >
> > Check with hooker they also have mounts .
> > I have L&L mounts in my truck and unless you use stock
> > manifolds
> > or L&L headers you have to modify the mounts. I have hooker
> > headers and I had to modify the mounts and the headers to get
> > them in only to find out later that hooker made mounts.
> > Good luck
> > Glen
> >
> > 77 F-250 4x4
> > 96 F-350 4x4
> >
> > ____________________________________________________________________....

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