[Diy_efi] RE: 555 timer efi

[John Smith]

The MAP sensor would actually be easier for me since I can hook it up and 
measure the output while running it through the pressure range. The tough 
part is finding a positive pressure MAP without having to buy anything. The 
MAF is tougher because I need a flowbench to test it, but can probably do 
some extrapolation to rough out the CFM vs MAF voltage/resistance. Its a MAF 
from an '89-90 240SX.

<Date: Mon, 16 Jan 2006 16:30:05 EST
<From: ScottyGrover at aol.com
<Subject: Re: [Diy_efi] RE: Diy_efi Digest, Vol 11, Issue 6
<Message-ID: <140.537a6a28.30fd6a5d at aol.com>

<You might try hooking the output of your MAP sensor to the Control input of
<the 555 (use your pot to check this input out, its output in terms of time
<delay  is roughly logarithmic for a linear input.) Hold your V input at 
line
<voltage  (assumed 12VDC.) If your MAP is antilog, you should have it made.  
By
<the way, what type of MAP are you using; I am using an old Datsun Z280 MAF. 
Less
<calculation required.
<Scotty