[Gmecm] Choosing ECM?

[Avery Nisbet]

Code 59 has fixed the max RPM limit already. I think its work up to or
over 7k now.

You could tune for just RPM.  Because the load will only change when
you change tracks or if the weather changes at the track.
Replace the Map sensor with a resistor and the TPS will be your only
load scaling input.  There are a lot of EFI systems that work this
way.
Im sure the GM or mega$quirt stuff can be tricked into do this pretty easily.

-Avery

On Thu, Sep 15, 2011 at 6:12 AM, David Allen <davida1 at hiwaay.net> wrote:
> Thomas,?I would assume that cam does not have a smooth idle and does not
> have much vacuum at idle. You may have your work cut out for you tuning that
> thing!
>
> What level of horsepower and RPM is it running?? Different ECM's and
> programs have limitations on the max RPM it can calculate. If you exceed
> that RPM it won't output the data correctly and the tables may or may not be
> scalable to that area.
>
> Not trying to discourage you from this project - just warning of a few
> things you will have to overcome.? Others on the list can give more info on
> specifics. I've never run into any RPM limits because my builds have used
> turbos and not high RPM.
>
> Sincerely,
> David
>
> ----- Original Message -----
> From: Thomas Martin
> To: gmecm at diy-efi.org
> Sent: Wednesday, September 14, 2011 9:48 AM
> Subject: [Gmecm] Choosing ECM?
> Friend of mine is looking to run his 9.70 at 134-135 mph Olds Small Block
> powered race car on EFI. ?Cam is around 324 degrees at the seat.
> For those who have run the OBD1 PCM/ECM's, what would be a good choice? ?He
> primarily needs it to handle fueling and timing. ?Or would it really be
> better to go with a LS1 PCM like an 0411 and OBD2? ?Not worried about
> flashing at the track to make changes.
> It needs to idle, and goes WOT. ?It spends very little time anywhere else.
> ?Currently has Nitrous (125 hp shot).
> I have RT-CATS Tuner and TunerProRT, Moates APU1 (Burner/real time/RS232
> interface/emulator combo) and he has a TPI computer now, he has to look and
> see what PN hardware he has. ?And he has a bunch of PROM's for it.
> Thanks!
> Tom
>
>
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