DIY_EFI Digest            Wednesday, 10 March 1999      Volume 04 : Number 155

In this issue:

	RE: Wiring harness for late model GM trucks 
	Help! Need rpm activated switch w/ hysteresis!!
	Re:  MAP Q?
	Re: Haltech
	Re: Bosch Motronic...Garret is THE man.
	Re: DME EPROM Editor Software

See the end of the digest for information on subscribing to the 
DIY_EFI or DIY_EFI-Digest mailing lists.

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

From: Marc Piccioni <mpiccioni@xxx.net>
Date: Tue, 9 Mar 1999 22:22:05 -0700
Subject: RE: Wiring harness for late model GM trucks 

where did you find these harnesses ?

- ----------
From: 	Jim Yeagley[SMTP:jimyeagley@xxx.net]
Sent: 	March 9, 1999 6:56 PM
To: 	diy_efi@xxx.edu
Subject: 	Wiring harness for late model GM trucks 

I found this in my browsing:

Manufacturer's overstock buyout on wiring harness assemblies for late model
GM trucks, busses, vans and RV's. These harnesses are priced at pennies on
the dollar compared to original distributor cost ! MFG P/N: 12069696, and
also MFG P/N: 12069591


Does anyone know if one of these will work with that 7747?






begin 600 WINMAIL.DAT
M>)\^(@P%`0:0" `$```````!``$``0>0!@`(````Y 0```````#H``$-@ 0`
M`@````(``@`!!) &`& !```!````# ````,``# #````"P`/#@`````"`?\/
M`0```&$`````````@2L?I+ZC$!F=;@#=`0]4`@````!D:7E?969I0&5F:3,S
M,BYE;F<N;VAI;RUS=&%T92YE9'4`4TU44 !D:7E?969I0&5F:3,S,BYE;F<N
M;VAI;RUS=&%T92YE9'4`````'@`", $````%````4TU44 `````>``,P`0``
M`"(```!D:7E?969I0&5F:3,S,BYE;F<N;VAI;RUS=&%T92YE9'4````#`!4,
M`0````,`_@\&````'@`!, $````D````)V1I>5]E9FE 969I,S,R+F5N9RYO
M:&EO+7-T871E+F5D=2<``@$+, $````G````4TU44#I$25E?149)0$5&23,S
M,BY%3D<N3TA)3RU35$%412Y%1%4```,``#D`````"P! .@$````"`?8/`0``
M``0````````#GD@!"( '`!@```!)4$TN36EC<F]S;V9T($UA:6PN3F]T90`Q
M" $$@xxx.B!7:7)I;F<@:&%R;F5S<R!F;W(@;&%T92!M;V1E;"!'
M32!T<G5C:W,@xxx.````SP<#``D`%@`6``4``@`5`0$@@ ,`#@``
M`,\'`P`)`!8`%0`I``(`. $!"8 !`"$```!&-S)"1#0W1#9!1#9$,C$Q0D4Y
M0S0T-#4U,S4T,# P, `2!P$#D 8`5 0``!(````+`",```````,`)@``````
M"P`I```````#`#8``````$ `.0!@xxx.B!7
M:7)I;F<@:&%R;F5S<R!F;W(@;&%T92!M;V1E;"!'32!T<G5C:W,@``````(!
M<0`!````%@````&^:K7O[7W4*_C6:A'2OIQ$15-4`````!X`'@P!````!0``
M`%--5% `````'@`?# $````8````;7!I8V-I;VYI0&%T=&-A;F%D82YN970`
M`P`&$.P;%D(#``<0PP$``!X`"! !````90```%=(15)%1$E$64]51DE.1%1(
M15-%2$%23D534T53/RTM+2TM+2TM+2U&4D]-.DI)35E%04=,15E33510.DI)
M35E%04=,15E 4U12051/4TY%5%-%3E0Z34%20T@xxx.C4``````@$)
M$ $```"^`@``N@(``/\$``!,6D9U,*& GO\`"@$/`A4"J 7K`H,`4 +R"0(`
M8V@*P'-E=#(W!@`&PP*#,@/%`@!P<D)Q$>)S=&5M`H,SMQ+,!Q,"@S0"Y!5%
M?0J BPC/"=D[%Y\R-34"@ <*@0VQ"V!N9S$P,R\44 L*%>$+\F,`0"!W`F@$
MD&4@xxx.# "
MT>!I+3$T- WP#- @H[D+63$V"J #8!/08P5 OBTBQPJ'(7L,,")&1@-A3CHC
MSB)&#((@xxx.FH'<'D%)]1 $\!R871O<_(N'D!T
M72-O)'T&8 (P&R6O)KM-"L 1<" Y+ @xxx.C4P-B!032H/)'U4;R<L
M3R:['.!Y7PW :4 3,[$:X#(N"?!G+F^P:&EO+1/ *7!E-%",9'4O?RL>=6)J
M(H'S,9\FNU=I!1 :H!X&'5 W!;$+8!/0( 1B`R!'3>$=H')U8VL$(![/']-<
M,S8A1QO5(D9).K%U&QV#! `@xxx.CQ<+B!NM'5F`-!T
M"' $D"<$(&QO=@20$\!O/!! <'7?'2$%0 (@'' Y[&$>80;0_R `!Y$ZS J%
M.[<ND$. 'F*=+I!V!B(`<!T`4E9"L#XN,6 =S0K ', 34&EC]PF 10`%0' )
M\ ,`!Y$"('\*A1VQ'- &\ M@!< %H&W?"K%*L2F 0M %$&<+@ = >QS1*4%I
M0X I@$RR$\ @DB$%T$9'+T O3C?P\C$!T#8Y4!$ND$B1"H6-!T!S37!/7#4Y
M,3Q<:0J%1&]*`FX=(!Y (&QK;D"@0!!F0^$<P&__5/ =M /P3( << 6P0V #
M\(<=L!VA2N$W-S0W'KWO5^\\CSV;%%(R$K B1@J%!1;!`%S@```#`! 0````
M``,`$1 `````0 `'," E4^&U:KX!0 `(," E4^&U:KX!'@`]``$````%````
*4D4Z( ````#N-@`'
`
end

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

From: Jason <srgnt03@xxx.net>
Date: Tue, 09 Mar 1999 22:38:18 -0800
Subject: Help! Need rpm activated switch w/ hysteresis!!

I need some help here, and soon. I have a variable geometry manifold
(Schrick VGi) that uses vacuum to open up an interior flap that changes
the runner geometry and thus the torque curve. It uses a controller,
two-way vacuum switch, and a vacuum tank. 

The controller has a ground, switched 12V+, an rpm signal tap from the
factory Bosch ECU, and a two pin connector that it uses to activate the
two-way vacuum switch (that's connected to a little diaphram that opens
the flap in the manifold). The controller has an adjustable rpm set
point for the rpm opening point (adjustable from 2K-6.3K rpm), and it
has an adjustable hysteresis setting from 0-200 rpm. The best torque is
made when the settings are 4K for the flap to open (short runners, high
hp up top), and a 50 rpm hysteresis (so it closes at 3950 rpm). Works
VERY well when all is functional. Rpm set points are made by DIP
switches (8 of them). Test mode will cycle the switch on/off (set all
DIP switches ot OFF), and turn the LED from green(closed flap) to red
(open flap, and back...

The controller is done for. It will not even function in test mode. A
new one is $300. That's insane, for such a simple PCB. I tested ALL my
connections for continuity, and all check out. The wiring is sound, and
everything checks out. The controller will activate the two-way vacuum
switch as soon as it gets switched power. Regardless of rpm signal, or
set point. I looked at the PCB (encased in epoxy, except for the DIP
switches)and there appears to be a little discoloration or corrosion in
there. I'm an ME, not an EE...so I need a replacement controller.

I looked at my Summit Racing catalog (pg. 119 & 126)and found a couple
rpm switches...but I don't think any of them have a hysteresis function.
The MSD one has a "low" and a "high", but that's it. I need something
that offers me adjustability from 3500-4500 rpm, with about a 50-100 rpm
hysteresis. I don't want to fab a PCB, I don't want to spend over $100,
and I need something soon. Without a controller, I have to choose
between low end torque, or high end power (by having the flap closed, or
open all the time). Drive-ability is less than perfect.

So, does anybody know of an rpm switch that has an adjustable "on", but
also has a hysteresis setting too? Maybe I could get the MSD unit, and
set the "off" rpm set point lower than the "on" set point (an have a
negative overlap, making my own hysteresis)???? Thoughts?

Jason
'93 VW Corrado VR6 w/ failing Schrick VGi controller!!

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

From: Jason <srgnt03@xxx.net>
Date: Tue, 09 Mar 1999 22:43:59 -0800
Subject: Re:  MAP Q?

<<I have a turbo car and
run pretty high boost, so I need a sensor that can cope with 2 bar
boost.
Do anyone know of a good source for these. Is the sensor from
electromotive or haltech any good? Are there cheaper alternatives?>>

The Electromotive TEC II uses GM MAP sensors. I have a TEC II, and I'm
looking at my GM part right now. It's a GM 2 bar sensor (orange 3 pin
connector...1 bar has a white one...can't remember the 3 bar color), and
the part number on it is 886 8153. 

Jason 
'93 SLC

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

From: Jason <srgnt03@xxx.net>
Date: Tue, 09 Mar 1999 23:03:12 -0800
Subject: Re: Haltech

<<I have been following the list for quite a while now (1+ year) in
hopes of
coming up with a diy fuel injection system for a turbocharged 4cyl
Volkswagen. The current injection is Bosch digifant that controls a
factory supercharger up to 11 psi ~ 160 hp. There exists aftermarket
chips
for up to 15 psi of boost ~ 190 hp. I am looking to turbocharge at 16 to
18 psi and hoping for 250+ hp (crank). >>

I'm your man. I can hook you up w/ the right people. So, want to turbo
your G60 huh?! Well, I have a TEC II and know what to do. I have an
Electromotive dealer/tuner that happens to be a friend of mine. He
installed/tuned a TEC II on a late model Golf III that had the New
Dimensions' Stage II turbo kit. Well, that 8v four banger was putting
out over 200hp at the wheels on 14psi. We backed off the boost to 11psi
and detuned it for the customer a bit (~180hp @xxx. He can still
spin the tires like crazy, even w/ the Quaife LSD. 

We're working on developing a TEC II set-up for the Corrado G60 because
others are doing what you want to...and there's a need. Have you
installed any kind of engine mods yet? Most people are happy w/ a Stage
III supercharger pulley and chip (17psi boost, 220hp). Especially a
Garrett chip. Garrett Lim is simply the best Bosch programmer around.
Hands down. VW/Audi/Porsche/BMW/Ferrari...anything European, it doesn't
matter. You can check out the Corrado G60 he tuned at his web page. W/ a
Group 'N' cylinder head...it was making 250hp @ wheels! From a standard
size G-Lader. Imagine what a GT1 G-lader (83mm vs. 60mm diameter) and a
1.9L block would do. We'll see, we're working on it! He he. 

You might want to subsribe to the Corrado Club of America internet
mailing list. You can ask the G60 guys questions.

Jason        
'93 SLC

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

From: Jason <srgnt03@xxx.net>
Date: Tue, 09 Mar 1999 23:12:02 -0800
Subject: Re: Bosch Motronic...Garret is THE man.

<<Trying to understand the Motronic of my 944 turbo Porsche,
I would like to know if there is somebody else on the same
path ? Are there any (public) information available ?>>

Like I mentioned earlier, Garrett Lim is the man. His chips and tuning
skills are tops. If you haven't heard of him yet...you will. 

His Motronic skills are magic. The dyno charts can't tell the whole
story. His part-throttle maps are incredible. Filled with torque. His
cam chips are second to NONE. Look at the 944 dyno stuff on his sight. 

http://www.giacusa.com/welcome.html

Enjoy.

Jason
'93 SLC

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

From: Shannen Durphey <shannen@xxx.com>
Date: Wed, 10 Mar 1999 03:18:35 -0500
Subject: Re: DME EPROM Editor Software

DME editor?  Believe this was written by a former list member.  Look
for "land shark" in the archives.
Shannen

Ezra Hall wrote:
> 
> oops, in my rush to try the software this am before leaving for the day, I
> didn't verify that when I loaded my EPROM data that it actually was loading
> my EPROM data. In fact, it only loaded the demo bin they include with the
> trial version of the software. The Help files specify that configuration
> files have to be purchased for each DME unit and EPROM combination (in
> addition to the actual software cost of course). Sorry for any confusion...
> 
> >I downloaded the demo software, and was able to view EPROM data from my
> >Motronic unit. The demo software doesn't allow saving of data. I have sent
> a
> >request for pricing info.

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

End of DIY_EFI Digest V4 #155
*****************************

To subscribe to DIY_EFI-Digest, send the command:

    subscribe diy_efi-digest

in the body of a message to "Majordomo@xxx.  

A non-digest (direct mail) version of this list is also available; to
subscribe to that instead, replace "diy_efi-digest" in the command
 above with "diy_efi".