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Date: Mon, 20 Oct 1997 03:50:21 -0600 (MDT)
From: owner-fordtrucks80up-digest ListService.net (fordtrucks80up-digest)
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Subject: fordtrucks80up-digest V1 #176
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fordtrucks80up-digest Monday, October 20 1997 Volume 01 : Number 176



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Ford Truck Enthusiasts - 1980 And Newer Trucks Digest
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=======================================================================
In this issue:

Re: Exhaust [Bill Funk ]
Re: EGR system robbing power? ["S. Spaulding" ]
Rough Idle - Ranger 4.0L ["Lare/Eric" ]
Re: EGR system robbing power? [Steven McCullough
Re: Where's the 5.0L in the Ranger [MadPoodle aol.com]
1996 Ford Ranger Rear Bumper For Sale [jsruss postoffice.worldnet.att.net]
Re: EGR system robbing power? ["C. E. White" ]
Re: Exhaust [silent.bob juno.com]
Re: 5.0 engine swap [silent.bob juno.com]
Re: Exhaust ["C. E. White" ]
Re: EGR system robbing power? [Steven McCullough
Re: Exhaust [Steven McCullough ]
Re: Exhaust [Geoffrey Hoffman ]
TIRES [bigguy ]
Re: TIRES [john.doe erols.com]
Re: TIRES [Geoffrey Hoffman ]
Re: TIRES [jsruss postoffice.worldnet.att.net]
Re: TIRES [jsruss postoffice.worldnet.att.net]
Re: TIRES [Geoffrey Hoffman ]
Rattle [Gary Snook ]
dash swap [Mobleaudio aol.com]
Crazy ideas [Steven McCullough ]

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Date: Sun, 19 Oct 1997 04:20:29 -0700
From: Bill Funk
Subject: Re: Exhaust
>
> From: Midwest96 aol.com
> Subject: Re: Exhaust
> >
> Josh,
> I live near Detroit, and one of my brother's friend's dad builds
> mustangs.
> I talked to him, and he siad that the only reason exhaust system are
> put on
> is because of noise. He also said that it would not hurt an engine to
> have
> no backpressure on it, but that it would be really loud. I found this
>
> doubtful...? What kind of performance increase would I get by
> changing
> exhaust? Thanx again,
>
>
> Craig

He's very close to being right.Today, exhaust systems are designed to
reduce emissions, too, but the
early exhaust systems were to cut noise, and route the exhaust away from

the passengers.
Current exhaust systems are restrictive because of their very design;
the
cat will introduce a restriction of its own. The engine designers use
the
exhaust restriction to reduce the combustion temps, reducing NOx
emissions somewhat.
You can open up the cat-back part of the exhaust system without too
much emissions increase on today's computer-controlled FI engines.
As for peformance increases, consider that the engine is, aside from
providing power to move the vehicle, a large air pump. It takes energy
to draw the air/fuel mixture into the cylinder, and it takes energy to
push the exhaust out. Anything you can do to reduce the amount of
energy needed for these operations will increase efficiency, either
improving performance or fuel mileage, or both. As the average RPM
increases, the benefits rise, too.
It is not necessary to use the high $ exhaust systems you see advertised

in many magazines. Any decent muffler shop with a mandrell bender
can fix you up with a larger diameter cat-back system. Stainless is
nice (and expensive), but regular exhaust pipe will last for many years
even in snow country if rinsed off once in a while. On many trucks, the
cat is so restrictive that a muffler may not be needed (ask the shop
to let you fire the truck up with just the cat & no muffler to see if
that's OK for you). For my '91 F-250 w/460, it was almost quiet
enough without a muffler, but I had a muffler put on anyway. Now
it's still about as quiet as stock, but mileage on a recent trip from
Phoenix to Casper, WY, on the cruise control at 65, went up from
12.2 MPG to 13.4 MPG, almost a 10% improvement. If we cruised
at higher speeds, the improvement would be greater (but I guess I'm
a fuddy-duddy!).
Hope this helps.
Bill

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

Date: Sun, 19 Oct 1997 09:17:40 -0700
From: "S. Spaulding"
Subject: Re: EGR system robbing power?

The EGR also cools the combustion chamber, reducing detonation. Don't
block it off.

Steven McCullough wrote:
>
> Here's a question regarding emission systems...I've been reading
> up on the EGR system on my wife's 2.3L mustang (I suspect some problems),
> but I guess this applies to any engine. My understanding of the EGR system
> is to re-introduce exhaust gas into the intake to reduce emmissions,
> supposedly
> this only happens at higher RPM, since at low RPM's it causes rough running
> (poor idle).
>
> Wouldn't this be robbing a significant amount of power at higher RPM's?
>
> I'm tempted to place a blocking plate between the exit of the EGR valve and
> the intake
> so that the valve works as normal, but no exhaust reaches the intake.
>
> I know, I don't want any 'greenies' griping at me about emmissions, this is
> just
> a thought.
>
> +-------------- Ford Truck Enthusiasts - 1980 and Newer --------------+
> | Send posts to fordtrucks80up listservice.net, |
> | Send Unsubscribe requests to fordtrucks80up-request listservice.net |
> +----------------- Site: http://www.ford-trucks.com -----------------+

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

Date: Sun, 19 Oct 1997 10:00:33 -0400
From: "Lare/Eric"
Subject: Rough Idle - Ranger 4.0L

About 8,000 miles ago (59,000 on the truck currently), I noticed that the
idle on my '94 Splash 4.0L was beginning to get a bit rough. At the
exhaust outlet it almost sounds like a miss of sorts - every two to four
seconds it will sort of 'puff'. At about the same time, the temperature
gauge begin to cycle from midway to very near the bottom of the gauge.

I took it to the dealership and they told me that this was pretty typical
for a truck with this many miles on it that was almost four years old -
which I expected them to say.

Does anyone have any ideas as to what could be causing the rough idle
problem, and, could the fluctuating temperature be related, or is it just a
coincidence?

I haven't gotten into this (or these) problems much yet, since they don't
seem to affect the performance or mileage of the truck, although both
problems seem to be getting more pronounced. Figured it high time to
diagnose this one before I have a serious problem on my hands.

Recently, I replaced (as general maintenance) the O2 sensors, PCV, plugs,
plug wires, & air filter.

Any help would be greatly appreciated.

Thanks,

Eric S. - '94 Splash 4x4 4.0L

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

Date: Sun, 19 Oct 1997 10:54:54 -0700
From: Steven McCullough
Subject: Re: EGR system robbing power?

I've heard this comment regarding cooling the combustion chamber elsewhere,
but
as of yet I don't buy into it - how does displacing cool outside air from
the normal
intake with hot exhaust gases cool the exhaust chamber 'better'.

Unless the thermo properties of exhaust gas lend it towards better heat
transfer?

I would sure appreciate a comment from anyone on this...before I go and
screw up
something

Steve



At 09:17 AM 10/19/97 -0700, you wrote:
>The EGR also cools the combustion chamber, reducing detonation. Don't
>block it off.
>
>Steven McCullough wrote:
>>
>> Here's a question regarding emission systems...I've been reading
>> up on the EGR system on my wife's 2.3L mustang (I suspect some problems),
>> but I guess this applies to any engine. My understanding of the EGR system
>> is to re-introduce exhaust gas into the intake to reduce emmissions,
>> supposedly
>> this only happens at higher RPM, since at low RPM's it causes rough running
>> (poor idle).
>>
>> Wouldn't this be robbing a significant amount of power at higher RPM's?
>>
>> I'm tempted to place a blocking plate between the exit of the EGR valve and
>> the intake
>> so that the valve works as normal, but no exhaust reaches the intake.
>>
>> I know, I don't want any 'greenies' griping at me about emmissions, this is
>> just
>> a thought.
>>
>> +-------------- Ford Truck Enthusiasts - 1980 and Newer --------------+
>> | Send posts to fordtrucks80up listservice.net, |
>> | Send Unsubscribe requests to fordtrucks80up-request listservice.net |
>> +----------------- Site: http://www.ford-trucks.com -----------------+
>+-------------- Ford Truck Enthusiasts - 1980 and Newer --------------+
>| Send posts to fordtrucks80up listservice.net, |
>| Send Unsubscribe requests to fordtrucks80up-request listservice.net |
>+----------------- Site: http://www.ford-trucks.com -----------------+
>
>

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

Date: Sun, 19 Oct 1997 11:51:56 -0400 (EDT)
From: MadPoodle aol.com
Subject: Re: Where's the 5.0L in the Ranger

Crawford Performance, Miami Fl, has built quite a few 302's, and rumour has
it, a few 351's.... Neat packages, clean install, very subtle little rocket
ships.


l8tr4u

Scott

93 F250 S/C, 351
92 Bronco, 351

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

Date: Sun, 19 Oct 1997 12:36:06 +0000
From: jsruss postoffice.worldnet.att.net
Subject: 1996 Ford Ranger Rear Bumper For Sale

For Sale:
Rear bumper from a 1996 Ford Ranger(chrome&gray steps) practically
brand new . Make reasonable offer . Located in central N.C. Will
also trade for a new rock crawler black bumper with built in hitch .
E-mail at jsruss worldnet.att.net

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

Date: Sun, 19 Oct 1997 15:18:49 -0400
From: "C. E. White"
Subject: Re: EGR system robbing power?

Steven McCullough wrote:
>
> I've heard this comment regarding cooling the combustion chamber elsewhere,
> but
> as of yet I don't buy into it - how does displacing cool outside air from
> the normal
> intake with hot exhaust gases cool the exhaust chamber 'better'.
>
> Unless the thermo properties of exhaust gas lend it towards better heat
> transfer?
>
> I would sure appreciate a comment from anyone on this...before I go and
> screw up
> something
>
> Steve

The "hot exhaust gas" is an inert gas that has no effect on the fuel/air
ratio. It displaces part of the normal charge of fuel and air with inert
gas. This acts to slow the combustion process, reduce peak
pressures/temperature, reduce the production of NOX and reduce the
chance of knocking. I do not know how your EGR is calibrated, but the
last time I checked one of my cars with EGR (a 1986 Mercury Sable), the
EGR was shut off at Wide Open Throttle, so it would not reduce maximum
power. I also had a 1986 Ranger 2.9L with EGR, it never knocked. My
Father's 1990 without EGR alway had problems with part throttle knock.
The gas mileage for the two trucks was about the same. I concluded
disconnecting EGR was not a good thing. YMMV

Ed
>
------------------------------

Date: Sun, 19 Oct 1997 15:40:24 -0500
From: silent.bob juno.com
Subject: Re: Exhaust
>
On Sat, 18 Oct 1997 16:56:51 -0400 (EDT) Midwest96 aol.com writes:
>He also said that it would not hurt an engine to
>have
>no backpressure on it, but that it would be really loud. I found this
>doubtful...? What kind of performance increase would I get by
>changing
>exhaust? Thanx again,

Ummm... You need back pressure or you can damage the valves.

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

Date: Sun, 19 Oct 1997 15:40:31 -0500
From: silent.bob juno.com
Subject: Re: 5.0 engine swap

On Sat, 18 Oct 1997 21:19:29 -0600 jimpitcock juno.com (Jim & Star
Pitcock) writes:
> For those of you that have gone to the 5.0, what expenses did
>you run into? Did you just start collecting parts over a period of
>time or did you just do it all at once? Did you have it professionally
>done or did you do it yourself? Any words of wisdom is greatly
>appreciated!


You are looking at over $6,500

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

Date: Sun, 19 Oct 1997 18:35:52 -0400
From: "C. E. White"
Subject: Re: Exhaust
>
silent.bob juno.com wrote:
>
> On Sat, 18 Oct 1997 16:56:51 -0400 (EDT) Midwest96 aol.com writes:
> >He also said that it would not hurt an ....

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