Which EFI

[Al Lipper]

Denis,
	First, it's certainly easier to buy a pre-made EFI system like Holley's
DFI, than to build one yourself.  However, there isn't the flexibility some
people want.  Mostly people build their own systems because they enjoy it,
and not because it provides great bennefits.  The other question you raise
is about whther to use an algorithm or look-up table.  Basically, the
answer is that for your primary fuel calculation, an equation will be too
slow to re-calculate in real time.  This is why everyone uses look-up
tables.  The other part to be away of is that each engine would require a
different equation, which would potentially be derived from actual tests of
the engine (data which could be used in a look-up table).  Good luck.

			Al


At 01:39 PM 2/5/99 -0800, you wrote:
>I m an electronic engineer and my hobby is for sure, EFI
>
>I have worked with 8048,51,31... and 68hc11
>
>The question is, where to start?
>
>Should I start with the equation on the diy-efi and do the algoritm
>so recreat the wheel again, or maybe you and others have the same algo.
>or the starting program ?
>
>Bosch put a lot engineer on the project Motronic (8051)and money and
>time, so, I would be surprise that someone like me can programe easily
>a 8051 to do the same job.
>
>It must be some compromises to do my way or yours.
>
>I have found 3 way to do an EFI
>
>-Take a GM EFI system (68hc11) or a Bosch (8051 or 48) and put my own
>tables and parameters :
>
>the problem is :only peaple like Promotive have the expertise, the
>money,
>and the time to find how it works.
>
>-Buy a system like TEC II EFI and ignition and a dyno to put all
>parameters
>
>-The last is , Do-it-Yourself EFI
>
>The last one is the one I prefer, but it maybe more expensive and
>dangerous to crash an engin than the TEC-II
>
>What is the real reson to do all your self ?
>
>
>Thank
>
>Denis djulien at cegep-chicoutimi.qc.ca
>
>1:40 Québec,Canada
>
>