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There are 7 messages in this issue.
Topics in this digest:
1. Re: bullet proof a/c blower
From: Horseman of PA <the_horseman_pa@xxxxxxxxx>
2. Re: Fuel Injection Modifications
From: jwit6@xxxxxx
3. Re: still the stupid clunk
From: Horseman of PA <the_horseman_pa@xxxxxxxxx>
4. Re: Blue exhaust
From: Horseman of PA <the_horseman_pa@xxxxxxxxx>
5. Re: Blue exhaust
From: "David Swingle" <dswingle@xxxxxxxxxxxx>
6. Re: Fuel Injection Modifications
From: wingd2@xxxxxxx
7. Re: Blue exhaust
From: jtrealty@xxxxxxxxxxx
________________________________________________________________________
________________________________________________________________________
Message: 1
Date: Sun, 28 Oct 2001 18:01:54 -0800 (PST)
From: Horseman of PA <the_horseman_pa@xxxxxxxxx>
Subject: Re: bullet proof a/c blower
Humidity and poor desing relate to alot of defective
parts in all cars.with excessive humity things tend to
rust faster, and with the blower in a standard postion
as opposed to an inverted one this will allow
condensation from humitidy to collect, what can you do
to stop it? I've found putting high temp grease on all
bearings seems to limit rust. but anytime you have
metal against metal theres friction, friction equals
heat which intern attracts mosture. rust is the
offspring of this combination. what can you do? well
other then submerging your vechicle in either silica
or a giant hermetically seal bubble. you gotta live
with it. water repellent grease can do miracles. I
dont know if I would fill the holes with silicone,
what you coulde be causeing is excessive heat build up
which could warp shafts or bearings causeing sqeaks.
Wayne
--- Walter <Whalt@xxxxxxx> wrote:
> I finally had to replace the a/c blower in my D. I
> wanted to find something
> with a larger/faster motor that turned in the proper
> direction, but couldn't
> find one. There is a style of motor that is larger
> (and I suppose faster)
> that fits perfectly, but it spins the wrong
> direction. I could fix this by
> reversing the polarity, but I want to keep
> everything on the car Negative
> Ground. I suppose it would be feasible to rearrange
> the electricals inside
> the motor, but it would be a lot of work. I might
> try that someday.
>
> For now I put a new PJ Grady motor on there, and it
> works great. But I
> didn't want this new motor to go bad for the same
> reason that the old one
> did. The OEM was noisy ever since I had the car
> (with 8600 miles on it).
> It since got worse (spraying lithium oil in there
> helped some) and
> eventually developed dead spots. I would have to
> pull the rubber hose
> loose, stick my finger in there and give it a spin.
> The last time I tried
> that it ate my finger nail.
>
> Why the OEM blower went bad is because condensate
> from the a/c seeped into
> the motor and rotted everything out. It rusted the
> bearings and corroded
> the brushes. So with the new blower, I sealed all
> the seams on top with
> silicone caulk. It is okay to seal these because
> the blower is cooled from
> air circulating through a vent hole on the top under
> the squirrel cage where
> water can't seep in. On most other cars the a/c
> blower is either mounted
> sideways or upside down, so gravity won't allow
> water to puddle around the
> rear bearing.
>
> Do any of you think this was a good idea? Does
> water actually puddle on top
> of the blower or is this just a general humitity
> problem that can't be
> avoided?
>
> Walt Tampa, FL
>
>
>
> To address comments privately to the moderating
> team, please address:
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>
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Message: 2
Date: Mon, 29 Oct 2001 02:05:03 -0000
From: jwit6@xxxxxx
Subject: Re: Fuel Injection Modifications
--- In dmcnews@xxxx, "Scott Mueller" <scott.a.mueller@xxxx> wrote:
> Can you post some pictures to the vault?
> What was the cost of the components?
> Can you use the stock fuel pump?
> How about writing a how to article for DMCNEWS, perhaps the
Moderators can
> add a section in Tech for Modifications.
DMC-12 Bosch CIS to Multiport EFI conversion.
Bosch CIS systems are almost entirely based on 1960's era technology,
and rely on a mechanical air flow meter to monitor engine load and
regulate fuel delivery. Most people agree that these air flow meters
pose a formidable intake restriction and rob anywhere from 10% to 15%
of available engine horse power. HP is directly related to the
volumetric efficiency of the engine, and the PRV can move a bit more
air when the CIS air flow meter flap is not in the way.
I used the Racetech Simple Digital Systems (www.sdsefi.com) EM3D.
There is no need for a laptop for programming. It has a well written
easily understood technical manual and documentation, a nice
intelligent website, and a growing user community with a forum for
SDS at http://network54.com/Hide/Forum/150383 . There is plenty of
friendly and knowledgable technical expertise available from both
Ross and Barry at Racetech. Plus the SDS EM3D is attractively priced.
Since I've never driven a CIS powered Delorean, I can't say anything
about my impressions concerning potential horse power increases. Also
I've not put the car on a dyno. All tuning ( of which very little has
been required ) has been done on the street.
Here are the details about what I used, and how it was done.
The injectors I used are low impedance Bosch part number 280-150-812,
which also cross reference according to Borg Warner to 280-150-828
and 280-150-829. Borg Warner part number 57172. Chrysler part number
4467050, INP-012, J0260675, MD116218, MD132249, MD141131, MD156661,
and MD157740. They can be found in the Dodge/Chrysler/Plymouth
Mitsubishi 3.0 V6 from a Dynasty 88-92, Caravan 89-91, Lebaron etc.
They are also listed as the same injectors that were used in the
Eagle Premier 3.0 Z7X-715 PRV V6 91-92. I choose the Bosch which are
characterized by a concave aluminum injector tip. The junk yards are
full of them.
The Bosch electronic injectors fit the existing 14 mm CIS injector
ports which is very nice. Tips are recessed 20 MM above the intake
tract within the 12 mm lower diameter of the injector port. The 30
degree injector spray pattern does not seem to impinge on the lower
port. Mine came from the scrap yard for $10.00 a piece and had to be
cleaned and tested.
Low impedance Injectors (2.5 ohms) can be tested with mineral
spirits, a standard fuel injection pump, filter, 43 psi regulator,
and 12 volts DC with an appropriate ballast resitor (like from a
914/4 Porsche), or when 3 or more injectors are run in series. For my
used injectors I ran and flushed them backwards first to clean the
internal filters. I tried to run no more than 30 seconds at a time
and avoided overheating the injectors. I understand Bosch injectors
can take a lot of abuse. I checked for leaks and an even spray
pattern. I've read that leaks should be no more than 2 drops per
minute. This is also a good way to find how much an injector actually
flows. Injector flow rates influence ECU programming pulse width
values, and flow rates are NOT published. So for other applications
you've got to figure out what you've got before you set up your
baseline ECU program values. The 280-150-812 Bosch injectors work
very nicely with reasonable duty cycle values in the normally
aspirated PRV 2.8. Racetech was very helpful with this.
The fuel pressure regulator is from a Nissan 280 ZX,1981 which runs
at 43 psi. Beck Arnley 158-0091 or Borg Warner 21710 . Also available
at Autozone for about $43.00. It uses 5/16 inch barb fittings and
mounts nicely to the forward right corner of the air flow meter
housing. You can run vacuum from the line that went to the old
Control Pressure regulator.
The Fuel Accumulator you can remove or keep. It doesn't matter.
I kept the Original Delorean Bosch fuel pump, delivery lines to the
engine compartment and return line plumbing.
I kept the original fuel filter and ran R9 MPI fuel line hose form
the fuel filter banjo fitting directly to the front LH brass hose
barb fitting on the new left hand fuel rail.
I removed the CIS Control Pressure Regulator, the delay valve from
the Control pressure regulator vacuum line and routed the line to the
280 ZX fuel pressure regulator.
The Cold Start Valve was removed. You can plug the end of the cold
start enrichment tube, or make a simple fitting to run the MAP sensor
from. This is a nice place to pick up the MAP because it is balanced
to all cylinders and orificed at the factory. Otherwise there is
another factory 1/8 inch NPT fitting available at the right rear
corner of the intake manifold.
I removed the Frequency Valve and optionally you can remove the
Delorean Bosch Lambda ECU.
I removed the upper half of the airflow meter housing, the fuel
distributor, gutted the upper air flow meter housing, and plugged all
the openings left after the fuel distributor, meter flap and pivot
had been removed. Then I reinstalled the gutted upper air flow meter
housing. If you're looking for an easier way to do this you can
simply remove the screw that holds the round air meter flap to the
pivot arm and leave everything else in place. Then all you've got to
do is plug the hole where the fuel distributor used to mount. This
way you don't even have to remove the meter housing.
I used a standard GM V-6 1 bar, three wire map sensor. Borg Warner #
EC1602, or the one available from Racetech. They are almost all the
same. Mounted with the orifice facing down.
The Air Temp Sensor was provided by Racetech, and is mounted in the
factory original 1/8 inch NPT plug located in the left rear corner of
the intake manifold.
The Engine Temp Sensor is also provided by Racetech. I removed the
thermostat drain plug located in the water pump thermostat housing
directly below the thermostat on the engine side of the thermostat
and drilled and tapped the plug for 1/8 inch NPT.
For the Distributor and Advance, I retained the existing vacuum
advance solenoid, micro switch on the throttle body and the entire
ignition system. The PRV is an ODD FIRE V-6, so tach signals from the
Bosch ignition ECU to the ignition coil are uneven. The Racetech SDS
ECU is driven off of this signal, which is picked up at the coil
terminal # 1. The SDS EM3D ECU is a "batch" injection system.
Injectors fire at the same time, not sequentially, and the fuel
charge hangs around in the intake manifold by the intake valve until
it's needed. Odd fire does not seem to be a problem since the
programmed RPM values I'm using for most of the RPM ranges are the
same or very flat. RPM values at the SDS ECU do seem to hunt a bit
sometimes but never more than 3 RPM ranges. If you're really
concerned about triggering the SDS ECU off of the ODD FIRE coil, then
you can opt to install a HALL effect triggering system off the crank
pulley. Mine runs very nicely off the tach signal.
I kept the original Bosch O2 Lambda Sensor. The Racetech SDS ECU can
be programmed to run in closed loop lambda mode between high and low
map values and high and low rpm values that you can set, using the
existing single wire or a newer 3 wire O2 sensor. Lambda closed loop
can adjust your baseline values by up to + - 25%. I have CL LOW RPM
LIMIT set to 1500, and CL HI RPM LIMIT set to 4500 (70% of redline).
CL MAP HI is set to -6.72. CL MAP LO is set to -15.2. Talk to Barry
or Ross at Racetech.
You should retain the Bosch Idle Speed Motor and ECU if you can.
My fuel rails are 1/8 inch NPT brass pipe. Four 4 inch nipples cut to
the correct injector port center to center distances and threaded
with a 1/8 inch NPT die, then assembled with 6 brass Tees. Four hose
barbs, one at each end of the 2 fuel rails connect to 5/16 MPI R9
fuel injection line. The line runs from the filter to the LH front
rail barb, the LH rear rail barb across the rear of the engine to the
RH rear rail barb, and then from the RH front rail barb to the fuel
pressure regulator. Rails are held in place by fabricated 3/4 inch
wide steel brackets secured to the valve cover bolts. Fuel return is
off of the right front fuel rail barb directly to the 280 ZX fuel
pressure regulator.
I was able to keep all of the existing Air Cleaner and pre-heat
system. The fuel rails are small enough to allow the original air
cleaner and intake pre heat plumbing to be retained. Air filter
housing clips closest to the engine had to be relocated to the sides
of the airfilter housing to avoid interferance with the new fuel
rail. I used safety wire through 1/8 inch vacuum line wound to the
correct length with the original clips, and then clipped them on to
the upper side edges of the air filter housing.
The Throttle Position Sensor is a 3 wire Potentiometer type. It is
driven by the existing horizontal throttle pulley by simple heater
hose and a machined aluminum fitting that mates with the tabs on the
switch. An aluminum and sheet metal bracket supports the switch. My
switch is off of a Ford 4 cyl courtesy of the scrap yard. Almost any
will work. Racetech can provide them in clockwise or counter
clockwise configurations. Delorean uses clockwise.
I mounted the SDS ECU right behind the driver seat where you'll find
the 3 existing OEM ECU's. Since I abandoned my Idle Speed Motor, I
removed the black Bosch idle speed motor ECU which sits right on top
of the metal mounting frame. The SDS ECU fits quite nicely. You can
also remove the Bosch Lambda ECU if you like, and rearrange the
remaing ECU's to make everything fit. Grounds are taken from the
metal mounting frame itself, and switched power is picked up through
a 1 amp fuse (which you must supply) to the main relay behind the
passenger seat. Hot switched power for the injector harness is taken
off of the HOT side of the ignition coil ballast resistor (white
wire,upper right spade connector).
The car passed Ohio Emissions Testing last week. I'll post some
pictures once I figure out how it's done.
Jim Witherspoon
Vin #6147
________________________________________________________________________
________________________________________________________________________
Message: 3
Date: Sun, 28 Oct 2001 18:10:05 -0800 (PST)
From: Horseman of PA <the_horseman_pa@xxxxxxxxx>
Subject: Re: still the stupid clunk
clunking when turning is a tough one, there can be
alot of reasons for this, one that comes to mind is
the CV joints. get in there and ispect for wear. more
then likely there wear on some part of the steering
rack. ussually what happens is as the rack traverse it
hangs up on a wear spot as the weight of the car rolls
it can pop it out of the struck postion causeing a
thud. Im gonna go with the CV joints though thats
about the only point of the vechicale your gonna have
extensive pressure while steering. I've seen CV joints
snap while driving, get them checked out just because
a boot is in good shape dosent mean the joint is. wear
and moisture can do wonders. If there find inspect the
steering rack or the steering differential. something
is not sitting good. until you find out what I'd
advise not driveing the car.
Wayne
--- Walter <Whalt@xxxxxxx> wrote:
> > Here's what I've done:
> > 1. checked the trailing arm bolts. Tight. Shims
> are 6 one side, 1 on the
> > other. That seems odd, because the parts list at
> Houston's site lists max
> 5
> > per side. Hmmm.
>
> It is hard to tell from your photo, but it looks
> like your shims might be a
> little thinner than OEM, and this could partly
> explain why you have so many.
> It would also seem that there should always be the
> same number of shims on
> both sides provided that the frame is straight.
> When I had my wheel
> alignment checked by Sears on their new high-tech
> laser system, they
> suggested that I remove one shim from the drivers
> side. (Currently I have 3
> on the drivers side and 4 on the passenger side. I
> think most DeLoreans
> left the factory like this.)
>
> > 3. Check all rear body to frame bolts. Although
> maybe I haven't got them
> > all... anyone have a list?
>
> Remember to check the parts manual. It has a great
> diagram of this.
>
> > While I was under the car this morning checking
> all that AGAIN... I
> grabbed
> > the right axle and slid it side to side. It makes
> a loud clunk
> sound --just
> > like the one I hear when turning-- as it travels
> as far as it can to the
> > outside. Is it supposed to do that?
>
> My car does the same thing. I saw somewhere on the
> DML that there is a ring
> that can be screwed in further to tighten this up.
> I'd like to learn more
> before I experiment with it.
>
> > I've pulled the CV boot back and tried to see if
> it needed extra grease,
> but
> > I can't tell. I might try to use the
> grease-gun-needle and squirt some
> more
> > grease behind it, if anyone thinks that might
> help.
>
> Since my CV boots are original, I'm worried about
> them cracking with age
> (although they look great.) Every time I get under
> the car, I hose the CV
> boots down with a generous amount of Armor-all.
>
> Walt Tampa, FL
>
>
>
> To address comments privately to the moderating
> team, please address:
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>
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>
>
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Message: 4
Date: Sun, 28 Oct 2001 17:51:27 -0800 (PST)
From: Horseman of PA <the_horseman_pa@xxxxxxxxx>
Subject: Re: Blue exhaust
Question? what grade of fuel are you running? if your
running 93 it can be to rich for the engine, also if
the engin was primed and turned over alot without
addeding oil to the cylinders you could of damaged the
oil rings. Ussually a cold engine will blow white to
blue smoke that smells like oil when it is cold, this
is due to the oil rings allowing oil to get on the
side walls of the cyliners, as the engin heats up the
rings expand makeing an adaquite sel, the cat will
burn up any residue. not haveing a cat on there could
be whats produceing some of the problem but if it's
alot of smoke it is probally the rings. if so you need
to do a re-ring engine overhall, might thing about
doing the vales to while your in there. I've notice
though my Fiero which has fuel injection will puff
blue smoke if I go to high on the octane rateing.
older engines were desinged for less rich fuels. hope
this helps.
Wayne
--- Paul Salsbury <paul.salsbury@xxxxxxxxxxxxxx>
wrote:
> Hi all
>
> Just managed to get everything together for the
> first time since body and frame were separated.
>
> Now my question.....
>
> Background.. When I first got the car it had not
> been started for approx 2 years and needed a tidy up
> around the engine and new muffler. The tidy up was
> done and it started first time........
>
> Now its back together with new muffler, apart from
> being a lot quieter, it is blowing a fair amount of
> blue tinted exhaust.
>
> What is causing this?
>
> I do not have a cat on the car, and do need a new
> oxygen sensor. could that be the easy answer?
>
> Any suggestions welcome
>
> Cheers
> Paul
> #6463
>
>
> [Non-text portions of this message have been
> removed]
>
>
>
> To address comments privately to the moderating
> team, please address:
> moderator@xxxxxxxxxxx
>
> To search the archives or view files, log in at
> http://groups.yahoo.com/group/dmcnews
>
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> http://docs.yahoo.com/info/terms/
>
>
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Message: 5
Date: Mon, 29 Oct 2001 02:45:23 -0000
From: "David Swingle" <dswingle@xxxxxxxxxxxx>
Subject: Re: Blue exhaust
--- In dmcnews@xxxx, "Paul Salsbury" <paul.salsbury@xxxx> wrote:
> Now its back together with new muffler, apart from being a lot
quieter, it is blowing a fair amount of blue tinted exhaust.
>
> What is causing this?
Blue exhaust = you're burning oil. Valve guides or piston rings. Both
are pretty rare failures on a PRV, but Bad Things Happen when an
engine is not run for many years.
Dave Swingle
________________________________________________________________________
________________________________________________________________________
Message: 6
Date: Sun, 28 Oct 2001 21:47:12 EST
From: wingd2@xxxxxxx
Subject: Re: Fuel Injection Modifications
In a message dated 10/28/01 3:50:21 PM Central Standard Time,
BobB@xxxxxxxxxxxxxx writes:
> Marty,
>
> Did you add multiport injection to your D?
> I haven't heard about this!!
>
> what system did you use?
>
> Bob Brandys
>
Bob,
Nope, it's not me. We've got a new member on the mailing list - jwit6 at
cs.com - who says he's put an EFI system from a bunch of different parts on
his D. I was just interested in more info and maybe some photos of his work.
Marty
[Non-text portions of this message have been removed]
________________________________________________________________________
________________________________________________________________________
Message: 7
Date: Mon, 29 Oct 2001 02:57:48 -0000
From: jtrealty@xxxxxxxxxxx
Subject: Re: Blue exhaust
Blue smoke is usually a sign that you are burning oil. There can be
several reasons for it.
First stick your finger into the tailpipe. If it is oily then you can
be sure the reason for the blue smoke. Now check that the engine has
the correct amount of oil, too much and it will burn the excess. If it
is very dirty or hasn't been changed in a long time an oil change may
help. Next a compression test and a leak-down test can tell the source
of the trouble mechanically. Another quick way is to remove the oil
fill cap while the engine is idling and if it is blowing blue smoke
you probably need rings. A malfunctioning crankcase venting system can
allow pressure to build up and cause oil burning. You can remove the
spark plugs and inspect them for oil burning. I can give some other
things to do but start with the easy ones first. The fuel you use
generally won't cause this unless you have put an additive in it for
some reason. Sometimes when a car is stored oil is put into the
cylinders and when the engine is started it will blow blue smoke for a
short time. Get it warmed up and it may go away. A cat won't cure blue
smoke and if it is oil it will foul the O2 senser.
David Teitelbaum
vin 10757
--- In dmcnews@xxxx, "Paul Salsbury" <paul.salsbury@xxxx> wrote:
> Hi all
>
> Just managed to get everything together for the first time since
body and frame were separated.
>
> Now my question.....
>
> Background.. When I first got the car it had not been started for
approx 2 years and needed a tidy up around the engine and new muffler.
The tidy up was done and it started first time........
>
> Now its back together with new muffler, apart from being a lot
quieter, it is blowing a fair amount of blue tinted exhaust.
>
> What is causing this?
>
> I do not have a cat on the car, and do need a new oxygen sensor.
could that be the easy answer?
>
> Any suggestions welcome
>
> Cheers
> Paul
> #6463
>
>
> [Non-text portions of this message have been removed]
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