MAF to MAP

[the Fredericks]

Air temp sounds like a good idea.  I'm planning to use one of the A/D ports
for the input 0-5V MAP signal, and one of the PWM outputs for the frequency
signal out.  Already had planned on RPM.  Does anyone know how well the ones
from HKS (VPC) work, and what inputs they use?

Thanks,
Kendall

-----Original Message-----
From: owner-gmecm at esl.eng.ohio-state.edu
[mailto:owner-gmecm at esl.eng.ohio-state.edu]On Behalf Of CSH-HQ
Sent: Tuesday, August 17, 1999 10:07 PM
To: gmecm at efi332.eng.ohio-state.edu
Subject: Re: MAF to MAP


Let's see Mass to vac.
Would need rpm, and air temp corrections.

Plus either volt to volt,
or frwq to volt

Bruce



>I'm working on a couple of microcontroller projects, and was wondering if
>anyone here has ever "mapped" the MAF signal to a MAP signal.  Is that
>confusing enough?  In other words, I'm using a 68HC11 mcu, and want to use
>one of the PWM outputs to emulate the MAF signal to a stock ECM.  I'm
>planning to try running the car with the MAF still in place, and a 3 bar
MAP
>hooked up, and data logging the two signals vs. RPM.  Then making a 2D
>lookup table for the mcu that would read the MAP and RPM, look up the MAF
>value, and output it.  Does anyone think this will be sufficient, or would
>it need more dimensions, like maybe delta TPS for accel/decel?
>
>Thanks for any opinions,
>Kendall Frederick
>