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

["nacelp" <nacelp@bright.net>]

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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