[Diy_efi] Re: Minimalist micro based EFI ?

[Mike]

At 08:45 AM 3/12/03 +0800, you wrote:
>On Tue, Mar 11, 2003 at 09:48:26PM +0800, Mike wrote:
>> mmmm, I wondering now that 10 bits is just not enough,
>
>10 bits gives you 0.1% of FSD accuracy.

Not enough for log which is the majority of cars on road today,

>> The MAF signal is log with a DC offset of around 1.5v (which
>
>Which MAF? Pierburg are making MAFs with integrated digital hybrid
>controller producing corrected and filtered output. Either PWM, CAN
>or analogue. There's also an integrated intake air temperature
>sensor.

Well, I'm talking my car and the vast majority of aftermarket MAFs
ostensibly for people who want larger throat sizes for more flow
and have ECU's which accomodate these with retuning of course.

Eg. In the performance market for turbos for RB0 type engines,
GTRs etc All of these are log output MAFs with a pretty similar
DC offset and the same 5v max output - variety of fow rates
and throat sizes...

rgds

mike
ps: put the supp cap in yet ? ;)
pps: Next time you are over I'd like to take a pic of your engine
bay.
ppps: Variety of beers cemented to back inside shelf of fridge ;)


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