Help with '85 Corvette '870 ECM

[superchevy]

Craig,

I'm in the same boat you're in - just learning (also fellow forum member -
18carfan). Did you see the forum post that mentioned the site where the
fellow changed from an '870 to a '165 ECM. Seems like a pretty good idea.
Lot more support out there for the 1227165 it seems like. Anyway, let's keep
and touch and learn as we go. I also just got the Tunercat software, a
burner, eraser, etc. I also picked up some kinda emulator that plugs into
the burner and the other end (ribbon cable between them) plugs into the ECM.
Suppose to let you change stuff on the fly but I don't know - we'll se i
guess.

----- Original Message -----
From: Craig Marcho <marcho at global101.com>
To: <gmecm at diy-efi.org>
Sent: Monday, March 20, 2000 6:51 PM
Subject: Help with '85 Corvette '870 ECM


> Okay, I've got a Needham's PB-10, a Datarase II, Tunercat software.....
all
> I need is to know what the heck I'm doing! I've tried changing some things
> in the software, but I don't know what to change. Any help would be
great...
>
> Here's what I've done:
>
> Rebuilt '85 TPI motor, everything is stock except cam: 280/280 advertised,
> 214/214 @ .050, .443/.443 lift. I've opened up the airbox lid, removed maf
> screens, bypassed TB coolant line, no cat, and Ford 24lb Injectors.
>
> Now, where do I start making changes? My BLM numbers are about 118 around
> town, and at WOT they hit 128 like they should, and O2 sensor is about
938.
> Is there somewhere in Diacom that tells me what LV8 is being used at any
> given time? What things should I change in the chip for my cam and
> injectors? I've got the stock '870 ECM with some 2732A EPROM's.
>
> I'm also looking for an ecu file to use with Winbin. Anybody made one yet?
>
> Thanks for any guidance!
>
> (I've read tuning101, but still need help with the '870 MAF system....)
>
> Craig Marcho
> http://welcome.to/corvette/
>


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