RE: 89 F-body ECU file = 89 Y-body ECU file?

[Mike Rolica <mrolica@meridian-mag.com>]

Ya , a bit.,, not so much the iat as much as the cts.  Think it was more to
do with the alum heads as they require less enrichment it seems.  Had to
bring the turn on temp for the fan from 108 to 100 and turn off at 101 as
there  was some major over shoot with the large rad.  Fan would turn on at
108 engine would creep to 120 before falling to 100 when fans would turn off
but continue to fall to 90.... Puzzled me with that temp was lower than
thermo stat but there must be enough in heatercore bypass and wp bypass to
bring it down.  Now temp gauge does not move wether fans are on or off. 

Also change the spark amount quitea bit and pw a bit for ct   again, might
be due to my setup.
Mike Rolica
Meridian Magnesium Products
Strathroy, Ont 
Ext. 260


		-----Original Message-----
		From:	nacelp [SMTP:nacelp@bright.net]
		Sent:	Friday, March 10, 2000 3:13 PM
		To:	gmecm@diy-efi.org
		Subject:	Re: 89 F-body ECU file = 89 Y-body ECU file?


		Well, you can get MAFs to go way past the 255 but that is
with the newer
		ecms.
		But, they get all the more expensive.

		On a different note.  Do you wind up moving the IAT, CTS
corrections around
		much?.
		Grumpy




		> Ok  if you want me to elaborate....  Map sensors are
cheap..... maf are
		> expensive.... Really expensive.  On a rump rump cam maf
sensors give
		erratic
		> readings  more so than map.. map you can dampen.  On mod
engine as mine,
		maf
		> would only read to about 2800rpm where it maxed out (255).
Map is
		> unlimited.  Maf is bulky and takes up room in intake
track.
		> For emp evidence.   Maf @ 400cfm there is a press drop of
4 in h2o.  so
		> fairly restrictive @ 500cfm pd is 12.5in h2o. (This is a
gutted and ported
		> maf)   A stock maf should be worse.
		> From what I've seen on the list, it is not yet possible or
		> it is really difficult and expensive to enable to read
past 255.  Your
		diff
		> in times, may be due to what you said earlier "...  Though
I don't claim
		to
		> have a fully tuned '730 bin file yet".   I do, with losa
help and advise
		> from Bruce ;0).
		>
		> On a personal note, I find map much easier to work with
and understand
		(may
		> be due to my background in mech. eng)
		> Mike Rolica
		> Meridian Magnesium Products
		> Strathroy, Ont
		> Ext. 260
		>
		>
		> -----Original Message-----
		> From: Michael Davis [SMTP:davis@mail.eecis.udel.edu]
		> Sent: Friday, March 10, 2000 11:20 AM
		> To: gmecm@diy-efi.org
		> Subject: Re: 89 F-body ECU file = 89 Y-body ECU file?
		>
		>
		>
		> Don't be so fast to suggest unless you've gotten further
		> emperical
		> data to support it...  Though I don't claim to have a
fully
		> tuned
		> '730 bin file yet, I tested the '730 and '165 systems head
		> to head
		> last weekend at the track and the '165 was constitantly
0.1
		> second
		> faster in the 1/4 mile on my car..  (Est. 400 gross HP)
		>
		> (I have built an adaptor cable that routes the '165 OEM
		> harness to a
		> '730, and my car is equiped with both MAP and MAF sensors
		> and dual
		> knock sensors...
		> http://www.eecis.udel.edu/~davis/z28/ecm_swap_730/
		> )
		>
		> Quarter-mile runs with the car, each about 15 minutes
after
		> one another..
		>
		> 1 (MAP) 13.098@105      (let car shift to OD)
		> 2 (MAP) 13.095@105      (let car shift to OD)
		> 3 (MAF) 12.941@105      (kept car in 3rd to
		> 5600rpm)
		> 4 (MAF) 13.071@103      (let car shift to OD)
		> 5 (MAF) 12.927@106      (kept car in 3rd to
		> 5800rpm)
		> 6 (MAP) 13.063@105      (kept car in 3rd to 5800rpm)
		> 7 (MAP) 13.050@105      (kept car in 3rd to 5900rpm)
		>
		>
		> In message <01BF8A80.695CCE40@amy-and-mike>,Mike rolica
		> writes:
		> >
		> >Been there and done that.  The 89 f body and vette 165
bins
		> are not laid =
		> >out the same.  I think1 or 2 tables are but thats about
it.
		> Want some =
		> >real improvement... swap to a 730.
		> >
		>
		>
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