Supercharged 3.8L - ECM P/N
Jennifer and Brock Fraser
fraser at forbin.com
Thu Aug 19 04:44:44 GMT 1999
I've got a question for anyone who has dealt with the supercharged 3.8L
engines... First off, are there any OBDII ECM/PCM's for these engines that
took a replaceable chip, or did they go flash at the same time that the LT1
and truck PCM's did?
Regardless of the answer to that, does anyone have the ECM part number for
those applications (OBDII & supercharged)?
And, as a "non-GMECM" side note, does anyone know how much used Eaton
blowers from these engines are selling for?
Many thanks,
Brock Fraser
-----Original Message-----
From: owner-gmecm-digest at esl.eng.ohio-state.edu
[mailto:owner-gmecm-digest at esl.eng.ohio-state.edu]On Behalf Of GMECM
Digest
Sent: Wednesday, August 18, 1999 4:00 AM
To: gmecm-digest at efi332.eng.ohio-state.edu
Subject: GMECM Digest V1 #233
GMECM Digest Wednesday, August 18 1999 Volume 01 : Number 233
In this issue:
Re: Software Dyno...
Re: Car dieing/torque convertor update
Re: Passing Emissions
MAF to MAP
Re: Passing Emissions
Re: FTP Server Temporarily Down (NC)
Re: MAF to MAP
RE: MAF to MAP
Re: Twin turbine TBI pump (was Suction through a unpowered Tank Pump.)
Re: Car dieing/torque convertor update
See the end of the digest for information on subscribing to the
gmecm or gmecm-digest mailing lists.
----------------------------------------------------------------------
Date: Tue, 24 Aug 1999 20:21:48 +0000
From: Tyler Townsley <ttownsley at sprynet.com>
Subject: Re: Software Dyno...
The ABS is right behind the drivers seat and you can use the signal from
it to give you a reading on tire rotation. The corvette has 43 pulses
per wheel turn which is fed to the ABS system at 250mv per pulse, I have
a preliminary schematic using radio shack parts to store and forward 4
channels through a parallel port but don't have the expertise in
electronics to put it together. A busy computer engineer friend did the
circuit design but has too many projects going on to help. I have the
software in a draft using clipper if I could get the interface worked
out. It could be used for any sensing device using the software to tell
it what the channel represents.
Anyone interested in helping make it happen?
Tyler
------------------------------
Date: Tue, 17 Aug 1999 19:54:15 -0500
From: DC Smith <morepoweral at tetranet.net>
Subject: Re: Car dieing/torque convertor update
Is this a Precision industries vigilante, by any chance?
Having it upgraded from 1 disk to 7?
I have the 7 disk zero stall in my Regal. It was REALLY expen$ive, but
I like it. :)
Roger Heflin wrote:
>
> The covertor I had was already one of the high dollar ones. They are
> charging about 1/4-1/3 of original purchase price to fix things, and
> that is less that what I could get a cheap one for.
>
> Adding the multiple clutchs would be over and above what it costs to
> fix things.
***********************************************************************
Dan Smith 84 Regal 12.03 at 110.45 GSCA# 1459
St.Charles, Missouri
mailto:morepoweral at tetranet.net
http://www.tetranet.net/users/morepoweral
***********************************************************************
------------------------------
Date: Tue, 17 Aug 1999 19:57:09 -0500
From: DC Smith <morepoweral at tetranet.net>
Subject: Re: Passing Emissions
FWIW,
I've tried the emissions chip. I think Mike Pitts tweaked them into
existence. I really didn't care for how the car ran with one of these
chips in it. (sorry Mike) They were free, thou.. ya can't complain too
much. :^)
I've had better luck passing emissions by using my laptop to put the
ECM into aldl mode. I've witnessed my Hc dropping like a rock after
changing the ECM to diagnostic mode. I just went through Missouri
emissions 3 weeks ago. The car failed the first time through, but then
passed with flying colors after the little laptop tweak.
Dave Zug wrote:
> So lets add some stuff. specifically what to do to ecm to help. on
> the buick list site there are links to "emissions" chips and there
> are also the stock chips available (bins). might be interesting to
> disesct them huh?
***********************************************************************
Dan Smith 84 Regal 12.03 at 110.45 GSCA# 1459
St.Charles, Missouri
mailto:morepoweral at tetranet.net
http://www.tetranet.net/users/morepoweral
***********************************************************************
------------------------------
Date: Tue, 17 Aug 1999 21:25:36 -0400
From: "the Fredericks" <fredericksk at worldnet.att.net>
Subject: MAF to MAP
I'm working on a couple of microcontroller projects, and was wondering if
anyone here has ever "mapped" the MAF signal to a MAP signal. Is that
confusing enough? In other words, I'm using a 68HC11 mcu, and want to use
one of the PWM outputs to emulate the MAF signal to a stock ECM. I'm
planning to try running the car with the MAF still in place, and a 3 bar MAP
hooked up, and data logging the two signals vs. RPM. Then making a 2D
lookup table for the mcu that would read the MAP and RPM, look up the MAF
value, and output it. Does anyone think this will be sufficient, or would
it need more dimensions, like maybe delta TPS for accel/decel?
Thanks for any opinions,
Kendall Frederick
------------------------------
Date: Tue, 17 Aug 1999 18:19:23 -0700
From: "TK" <terryk at foothill.net>
Subject: Re: Passing Emissions
I set a horribly pumped Fiero V6 to TDC at idle in the code. It passed fine.
At high RPM, the EGR and cat kicked in better so no tweaking was done there.
Terry
- ----- Original Message -----
From: DC Smith <morepoweral at tetranet.net>
To: <gmecm at efi332.eng.ohio-state.edu>
Sent: Tuesday, August 17, 1999 5:57 PM
Subject: Re: Passing Emissions
> FWIW,
> I've tried the emissions chip. I think Mike Pitts tweaked them into
> existence. I really didn't care for how the car ran with one of these
> chips in it. (sorry Mike) They were free, thou.. ya can't complain too
> much. :^)
> I've had better luck passing emissions by using my laptop to put the
> ECM into aldl mode. I've witnessed my Hc dropping like a rock after
> changing the ECM to diagnostic mode. I just went through Missouri
> emissions 3 weeks ago. The car failed the first time through, but then
> passed with flying colors after the little laptop tweak.
>
> Dave Zug wrote:
>
> > So lets add some stuff. specifically what to do to ecm to help. on
> > the buick list site there are links to "emissions" chips and there
> > are also the stock chips available (bins). might be interesting to
> > disesct them huh?
>
> ***********************************************************************
> Dan Smith 84 Regal 12.03 at 110.45 GSCA# 1459
> St.Charles, Missouri
> mailto:morepoweral at tetranet.net
> http://www.tetranet.net/users/morepoweral
> ***********************************************************************
>
>
------------------------------
Date: Tue, 17 Aug 1999 20:47:04 -0500
From: nacelp at jvlnet.com (CSH-HQ)
Subject: Re: FTP Server Temporarily Down (NC)
Last two I saw (unassemblied) were off of Anaheim Blvd, in Downtown Anaheim,
CA, before Frudrakers Burgers went in. Think one was a roller, and one just
a frame, and shell.
Bruce
>
>--
> Marc Randolph - mrand at pobox.com - PGP keyID: 0x4C95994D
> If you have any info on the mid-60's car called the Bill Thomas
> Cheetah, or know anyone that might, please contact me.
>
------------------------------
Date: Tue, 17 Aug 1999 21:06:54 -0500
From: nacelp at jvlnet.com (CSH-HQ)
Subject: Re: MAF to MAP
Let's see Mass to vac.
Would need rpm, and air temp corrections.
Plus either volt to volt,
or frwq to volt
Bruce
>I'm working on a couple of microcontroller projects, and was wondering if
>anyone here has ever "mapped" the MAF signal to a MAP signal. Is that
>confusing enough? In other words, I'm using a 68HC11 mcu, and want to use
>one of the PWM outputs to emulate the MAF signal to a stock ECM. I'm
>planning to try running the car with the MAF still in place, and a 3 bar
MAP
>hooked up, and data logging the two signals vs. RPM. Then making a 2D
>lookup table for the mcu that would read the MAP and RPM, look up the MAF
>value, and output it. Does anyone think this will be sufficient, or would
>it need more dimensions, like maybe delta TPS for accel/decel?
>
>Thanks for any opinions,
>Kendall Frederick
>
------------------------------
Date: Tue, 17 Aug 1999 22:16:11 -0400
From: "the Fredericks" <fredericksk at worldnet.att.net>
Subject: RE: MAF to MAP
Air temp sounds like a good idea. I'm planning to use one of the A/D ports
for the input 0-5V MAP signal, and one of the PWM outputs for the frequency
signal out. Already had planned on RPM. Does anyone know how well the ones
from HKS (VPC) work, and what inputs they use?
Thanks,
Kendall
- -----Original Message-----
From: owner-gmecm at esl.eng.ohio-state.edu
[mailto:owner-gmecm at esl.eng.ohio-state.edu]On Behalf Of CSH-HQ
Sent: Tuesday, August 17, 1999 10:07 PM
To: gmecm at efi332.eng.ohio-state.edu
Subject: Re: MAF to MAP
Let's see Mass to vac.
Would need rpm, and air temp corrections.
Plus either volt to volt,
or frwq to volt
Bruce
>I'm working on a couple of microcontroller projects, and was wondering if
>anyone here has ever "mapped" the MAF signal to a MAP signal. Is that
>confusing enough? In other words, I'm using a 68HC11 mcu, and want to use
>one of the PWM outputs to emulate the MAF signal to a stock ECM. I'm
>planning to try running the car with the MAF still in place, and a 3 bar
MAP
>hooked up, and data logging the two signals vs. RPM. Then making a 2D
>lookup table for the mcu that would read the MAP and RPM, look up the MAF
>value, and output it. Does anyone think this will be sufficient, or would
>it need more dimensions, like maybe delta TPS for accel/decel?
>
>Thanks for any opinions,
>Kendall Frederick
>
------------------------------
Date: Tue, 17 Aug 1999 20:12:58 -0600
From: bearbvd at sni.net (Greg Hermann)
Subject: Re: Twin turbine TBI pump (was Suction through a unpowered Tank
Pump.)
>>> >I'm trying to figure out if this is a multi-motored/shafted, execusion,
>of
>>> >have a twin turbine pump, I've never seen such an animal. On one of
the
>gm
>>> >they used to little turbines blowing against each other but it didn't
>look
>>> >like anything trick
>>> >Bruce
>>> >
>>>
>>> Nope, the 12-903 is kinda like an oil pump in a SBC. Nothing fancy.
>Single
>>> motor, single input shaft, one gerotor eccentric pumping cell. I'm not
>>> familiar with the twin turbine pumps you reference.
>>>
>>> Take care of yourself, and all the best!
>>>
>>> Walt.
>
>>SBC oil pump is a gear type. I've seen gerotors in Ford cars.
>>Shannen
>
>
>
>
>Correct. When I said "kinda" like a SBC oil pump I was trying to convey
the
>mental picture of gear teeth meshing in order to convey fluid. My thought
>was that this would differentiate the concept from other alternative pumps
>relying upon roller elements, turbines, and eccentric slung vanes.....
>
>The "Gerotor" is indeed an alternative type of gear pump. Take the same
SBC
>oil pump, turn one of the gears inside-out, enlargen it, slip it over the
>other gear, and voila you have an eccentric gerotor cell.
>
>Bye the way, they are quiet.
But DEFINITELY sensitive to dirt! I wouldn't want to run one of these
without at least a suction sock!
This is exactly why I am STILL so tempted by a marine bilge pump: LOTS of
flow, about the correct pressure for a primary, in tank pump, and DESIGNED
to pump dirt without a fuss. Also, easy on the current at low flow rates
(with low flow meaning anything up to 1500 HP worth of goaoline flow, no
problem). Great reliability, particularly at the low flow rates it would be
seeing as a primary fuel pump--since running at high flow rates, not
running at the stall head/low flow, is what puts a load on a (centrifugal)
pump's motor.
I am sitting here looking at a Rule 3500, 24 volt bilge pump (also
available in 12 volt). A little bulky, about $125 from Graingers. It will
flow 36 HUNDRED gallons per hour into low head, and its stall (no flow)
head on gasoline should be about 7.5 or 8 psi. Its outlet is a plastic barb
for 1-1/4" diameter hose. It will pump about a 1/8' diameter pebble without
hurting itself.
I think I may have to soak this pump in solvent to see if anything
deteriorates. I am quite sure that the Coast Guard standards for anything
electrical going into a bilge are at least as demanding as what the auto
makers use for stuff destined for use in the inside of fuel tanks--a bilge
is actually a MORE dangerous environment than the inside of a fuel tank!!
Regards, Greg
>
>
>Walt.
------------------------------
Date: Tue, 17 Aug 1999 21:40:15 -0500 (CDT)
From: Roger Heflin <rah at horizon.hit.net>
Subject: Re: Car dieing/torque convertor update
On Tue, 17 Aug 1999, DC Smith wrote:
> Is this a Precision industries vigilante, by any chance?
> Having it upgraded from 1 disk to 7?
>
> I have the 7 disk zero stall in my Regal. It was REALLY expen$ive, but
> I like it. :)
The one I currently have is a 1 disk vigilante, I am going to see what
it costs to have it converted to a multi disk one.
And their one disk convertor is not cheap either, it is just not as
expensive as the 7 disk one.
Roger
------------------------------
End of GMECM Digest V1 #233
***************************
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