V6 Vortec to V8 Vortec Conversion

Wed Aug 16 21:39:49 GMT 2000

He's part of carputing, or at least working hand and hand with them.  he
pumped the list for help, for a freeware idea, and then went commercial.
Bruce

----- Original Message -----
From: "Gary Heuston" <gary.heuston at afwa.af.mil>
To: <gmecm at diy-efi.org>
Sent: Thursday, August 16, 2001 4:14 PM
Subject: Re: V6 Vortec to V8 Vortec Conversion

> ok I'm confused...I did a cursory examination of the archives (didn't have
time
> to look through 18 sets real close, I'm at work) and I see where Ken
started the
> project, picked some folks brains, fried a PCM (oops)  but then theres
nothing
> there...If carputing really did take the freeware  idea and begin selling
it,
> why doesn't Ken jump up and start kicking some heads around?  I know I'd
be
> pissed if someone took my freeware idea and started making money off it...
>
> Gary
> gary.heuston at afwa.af.mil
>
>
>
> Gregg Dickson wrote:
>
> > They are making a MINT off this stuff too...$550 for LT1 Edit for OBDII.
> > Makes you want to develop a freeware OBDII editor just to knock em out
of
> > business...
> >
> > Gregg
> > -----Original Message-----
> > From: owner-gmecm at diy-efi.org [mailto:owner-gmecm at diy-efi.org]On Behalf
> > Of Bruce
> > Sent: Wednesday, August 16, 2000 3:01 PM
> > To: gmecm at diy-efi.org
> > Subject: Re: V6 Vortec to V8 Vortec Conversion
> >
> > Oh Carputing, they have an interesting history.
> > See, that was all going to be Freeware.  Up until they figured out that
> > after they got the help they needed, that they could make a buck on it.
> > A check of the archives, will show the truth.
> > 30 people for 15% how generous, hahaha.
> > I'd rather retrofit an earlier PCM, and buy from tunercat.
> > Bruce
> >
> > ----- Original Message -----
> > From: "Gregg Dickson" <gdickson at sbti.com>
> > To: <gmecm at diy-efi.org>
> > Sent: Thursday, August 16, 2001 2:00 PM
> > Subject: RE: V6 Vortec to V8 Vortec Conversion
> >
> > > Al,
> > > I may be missing something here but there is an OBDII version of LT1
Edit
> > > available from www.carputing.com (developed by Dave Hempstead & Ken
> > Kelly).
> > > As a matter of fact we are currently mounting a GP on it and have 25
of
> > our
> > > 30 required orders to get the 15% discount level.
> > > As far as scanners for OBDII, there aren't many choices yet. I decided
to
> > > get Alex Peper's OBDII Explorer package (www.obd-2.com). There is
another
> > GP
> > > being put together for it with a 40% discount ($73 for GM) at
> > > www.impalassforum.com. This site is down because many of the Impala
folks
> > > are in Detroit this week.
> > >
> > > email me off list and I'll send you a bunch of other OBDII links if
you
> > > wish.
> > >
> > > Gregg Dickson
> > > Enterprise IT Architecture
> > > Stonebridge Technologies
> > > gdickson at sbti.com
> > > http://www.sbti.com
> > > 404.327.4670
> > >
> > > -----Original Message-----
> > > From: owner-gmecm at diy-efi.org [mailto:owner-gmecm at diy-efi.org]On
Behalf
> > > Of JANETSKY, ALBERT (AIT)
> > > Sent: Thursday, August 16, 2001 12:35 PM
> > > To: gmecm at diy-efi.org
> > > Subject: RE: V6 Vortec to V8 Vortec Conversion
> > >
> > >
> > > ahhh... a reply!  I've realized that in 98 GM started using passlock
2.  I
> > > think I'll set the 98 PCM on the shelf and see if I can completely
> > reprogram
> > > 96 v6 PCM for a v8.
> > >
> > > I'm feeling like I might have stumbled into something that I'll find
very
> > > little support for.  Essentially zero support for the obd-ii systems
on
> > the
> > > web.
> > >
> > > I think I can figure out how to interface the obd-ii interface with my
> > pc...
> > > but haven't stumbled upon any applications out there that can
communicate
> > > with it.
> > >
> > > AL
> > >
> > >
> > > -----Original Message-----
> > > From: Len Sabatine [mailto:sabatine at epix.net]
> > > Sent: Thursday, August 16, 2001 10:35 AM
> > > To: gmecm at diy-efi.org
> > > Subject: Re: V6 Vortec to V8 Vortec Conversion
> > >
> > >
> > >      While the PC Dyno program may be giving some cool gross HP
numbers ,
> > >      I would be looking at the shape of the torque curve more closely
,
> > > especially
> > >      with an OBD2 PCM. Overall , a LT1 F-Y Body production cam w 1.6
> > rockers
> > >      will drive better and be easier to get up and running.
> > >      A '96 Vortec PCM is not identical to a 98  Vortec PCM , just
close.
> > >       Len
> > >
> > > >Hello All...
> > > >
> > > >My name is Al Janetsky.  I'm a Systems Engineer with a
telecommunications
> > > >organization... and for fun I'm converting a 1996 GMC Sonoma
sportside
> > > >equiped with the 4.3L Central Sequential Fuel Injected Vortec to a
5.7L
> > V8
> > > >Vortec. I'm hoping to keep the truck streetable with occasional runs
on
> > > >Saturday nights at the local drag strip (for fun).
> > > >
> > > >The donor motor, wiring harness, and PCM is out of a 1998 3/4 ton GMC
> > > >Sierra.
> > > >
> > > >I currently have the engine at Kendricks of San Antonio for my
machine
> > > work.
> > > >
> > > >Modifications include porting and resurfacing the Vortech heads.  An
LT4
> > > Hot
> > > >cam package... 1.6 roller rockers, and upgraded valve springs.  The
specs
> > > on
> > > >the cam are 218/228 at .525/.525
> > > >
> > > >I plan to swap out the v6 pcm for the v8 pcm... (even though they are
> > > >identical except for the programming).  I plan to use the existing v6
> > > wiring
> > > >harness and run a few of the pinouts from the pcm to the fuel
injector
> > > >assembly. I've already traced the pinouts from the ecm to the
injectors,
> > > and
> > > >think that it will be a fairly straight forward swap.
> > > >
> > > >There are a couple of major concerns that I have regarding my
project.
> > > >First off -  Does anyone think this cam is too large for my
conversion.
> > > The
> > > >vehicle should weigh in at about 3275 after the v8 is installed.
Gearing
> > > on
> > > >the vehicle is a 3.08 locker, and the transmission is a 5 sp New
Venture
> > > >3500 that I just rebuilt.  I know that I can give up some low end
> > torque...
> > > >and it looks like this cam will make gobs (in comparison to existing)
of
> > > >power way up in the rpm range.
> > > >
> > > >A computer program at the machine shop speced out about 330HP with
the
> > use
> > > >of small tube headers and somewhere near the 400 ft/lbs of torque
mark.
> > > I'm
> > > >concerned that the PCM will not be able to handle all of the
duration.
> > > >
> > > >Some other areas that I would like to address are the identification
of
> > the
> > > >98 OBD-II PCM and how I might be able to custom program the system to
be
> > > >more compatible with the modifications... (including tach, gearing,
> > manaul
> > > >trans, etc. etc.)
> > > >
> > > >I'm willing to spend time doing the research... but so far it appears
> > that
> > > >most of the information on the web is related to older efi systems.
I've
> > > >considered the hypertech solution... but to me, it's only a duct tape
> > > >solution being that I can't fine tune the system to my needs.
> > > >
> > > >I'd really appreciate any information about the 98 pcm, communication
> > > >protocols, etc that would get me started in the proper direction.
> > > >
> > > >Thankyou,
> > > >
> > > >Albert Janetsky
> > > >aj5242 at txmail.sbc.com
> > >
> >
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