Haltech E6GM

[Mike Buckham]

Oops - I meant to forward this to someone, not reply. Sorry all.

>----------
>From: 	Mike Buckham
>Reply To: 	diy_efi at efi332.eng.ohio-state.edu
>Sent: 	18 January 1999 13:59
>To: 	'diy_efi at efi332.eng.ohio-state.edu'
>Subject: 	RE: Haltech E6GM
>
>
>
>>----------
>>From: 	bearbvd at sni.net[SMTP:bearbvd at sni.net]
>>Reply To: 	diy_efi at efi332.eng.ohio-state.edu
>>Sent: 	16 January 1999 01:13
>>To: 	diy_efi at efi332.eng.ohio-state.edu
>>Subject: 	Re: Haltech E6GM
>>
>>>I did a little reading through the archives and came across a post
>>>which mentioned that one drawback to the E6GM was that the RPM
>>>increments were 1000RPM as opposed to 500RPM in another system.
>>>
>>>Can someone explain the difference in operation and the effect on
>>>programming as well as driveablity?
>>>
>>>TIA,
>>>
>>>Charles Brooks
>>
>>Your fuel and timing maps are basically a matrix of (engine) load vs.
>>speed, with fuel/advance values at each point on the chart. Either MAF or
>>MAP is used as the load indicator, RPM as the speed indicator. Having
>>mapped points every 500 RPM (with respect to speed) results in twice as
>>many points on each chart as having them every 1000 RPM would. This leads
>>to more accurate tuning. On the best systems, RPM increments and load
>>increments are user selectable, and do not necessarily have to be evenly
>>spaced (for instance, you could choose to lay your RPM increments out so
>>that each higher one was an equal percentage greater than the one below!!)
>>
>>Take a look at the web sites for MoTeC and/or Autronics if you want to get
>>a good idea of what programming options are available on higher end units.
>
>http:\\www.motec.com
>http:\\www.autronics.com
>>
>>Also, there was a thread a few weeks ago talking about the effect of the
>>minimum increment in injector pulse width of which a given ecu is capable
>>of incrementing, and the effect of that factor on a tuner's ability to get
>>an engine to idle in a civilized manner--particularly if using a big cam
>>and/or injectors. IMHO, a unit with a minimum pw increment of more than 16
>>us --preferably 8 or 10 us (us, not ms) is not worth a #$@% for a
>>STREETABLE hypo application. Check this out carefully before you buy!!
>>
>>Regards, Greg
>>
>>
>>
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