More Questions. now on 94 p/u

[Mike Rolica]

Have the burner and eraser.  Even have engine analyzer , but have not had
time to hook it up. The cam is a single pattern 258 deg. Adv. 208 at .050,
.435 lift ground on a 112 deg lsa. Compression is about 10.5:1.  Just
wonderin if anybody has worked with this ECU/pcm. What I can do to improve
it.
Mike Rolica
EXT. 260
 :-)


	-----Original Message-----
	From:	EFISYSTEMS at aol.com [SMTP:EFISYSTEMS at aol.com]
	Sent:	Monday, October 25, 1999 4:18 PM
	To:	gmecm at efi332.eng.ohio-state.edu
	Subject:	Re: More Questions. now on 94 p/u

	Hi Mike,
	       When you remove the glove box ( 4 -7mm or 9/32 screws ) your
pcm will 
	be on the right.  It should have a red connector and a blue
connector,  this 
	will not interchange with the 747 as your computer also controlls
the 
	transmission.  
	        This computer uses a 27512 chip and has two main fuel tables
and two 
	main spark tables both set to switch to the secondary at 3% Tps and
roughly 3 
	mph(this can be adjusted) There is also a very fine grain low rpm
fuel table 
	0-1600 rpm in 100 rpm increments and 5 kpa increments....Lots of
trans stuff 
	and much more engine stuff than I have stated...If my memory serves
me 
	correctly it uses 2 68hc11 processors.( I could be wrong though) 
	        When you were on the dyno I am assuming no computer was
installed and 
	it had headers and now in the vehicle is all stock????  If you can
get me the 
	cam specs and all other mods I might have done something similar and
can get 
	you a head start on a .bin file or send you a memcal...but to truly
fine tune 
	it you are going to want to have your own burner and erasure and
lots of 
	time.....let me know.
	-Carl Summers


	In a message dated 10/25/99 7:03:42 AM Pacific Daylight Time, 
	mrolica at meridian-mag.com writes:

	<< Subj:     More Questions. now on 94 p/u
	 Date:  10/25/99 7:03:42 AM Pacific Daylight Time
	 From:  mrolica at meridian-mag.com (Mike Rolica)
	 Sender:    owner-gmecm at esl.eng.ohio-state.edu
	 Reply-to:  gmecm at efi332.eng.ohio-state.edu
	 To:    gmecm at efi332.eng.ohio-state.edu (Gmecm (E-mail))
	 
	 A while back I got the motor on my old mans pickup rebuilt.  It is
a 94 Fs
	 GMC ¾ ton 4x4 Ext cab shortbox.  It has  350 tbi 4spd (60L4E I
think) 16"
	 tires ect ect.
	 He does a lot of towing as he has a farm on the side, A 20' 2 axle
cattle
	 trailer- about 11 tons most of the time.  He goes to Denver col.
Every year,
	 new york, ect. Ect at 200 000km the motor started to knock when it
was
	 cold., burn oil ect.
	 
	 We rebuilt the motor using Isky custom sing pattern cam, 265 adv.,
450 lift
	 (I think, it's around there)  I did some work to the heads :-)
gottem swirl
	 chamber buggers to flow a little better (80%)  which is the reason
for the
	 single pattern cam.  Used hyperutectic flattops, decked block to
.005 in the
	 hole.  Runs about 10.5:1.  On the dyno it ran awesome, used a Oval
track
	 distributor some 104 oct and a 2bbl Rochester also used for oval
track with
	 an adapter plate  made up.  Plate was kinda crude as intake bores
were a bit
	 out compared to the carb.  Motor made 300hp, 405ft-lbs.
	 
	 Now in the truck runs like crap!
	 Before, the truck ran rough at idle (shook), smelled like rotten
eggs some
	 times. Now it is worse.  Also sound like a diesel when cold until
goes into
	 closed loop,
	 Would appreciate it if some people could give me info on the
following:
	 *  Ecm/pcm type number
	 *  Type of prom
	 *  Suggested mod to programming for new motor and the application
of
	 the truck
	 *  Links to anyone having experience on this ECM
	 *  What to do
	 *  Any suggestions
	 *  Bruce? Any comments
	 *  Please
	 *  Hacks
	 *  Where to look
	 Mike Rolica
	 EXT. 260
	  :-)
	 
	  >>