MAP

[Chris Morriss]

In message <3253E5F7.1E98 at net-quest.com>, Todd Knighton <knighton at net-
quest.com> writes
>Mark,
>       My question is WHY?  Remember KISS.  A good motorola map sensor that is
>temperature trimmed and compensated sells from Newark for about $23.00. 
>And you don't have to backwards calculate MAF to MAP.
>
>
>Todd Knighton
>Protomotive Engineering
>
>
>Mark Pitts wrote:
>> 
>> I've trying to work out how to build a map sensor.
>> 
>> Try this on your brains:
>> 
>> Put a tiny hole in the manifold, and connect that to one of the Honeywell 
>miniature MAF sensors, and work out MAP by MAF through the tiny restriction.
>> 
>> Seems to work for me (till the hole gets blocked!), so any comments welcome.
>> 
>> The sensor is about $90, good specs, but its MAF range is measured in SLM.. 
>anybody know what SLM is?
>> 
>> Mark
>

Be careful of the low cost pressure sensors, (Motorola/Sensotronics
types).  The output varies quite strongly with temperature changes.  I
suggest that you pay the bit extra for the temperature compensated ones.
-- 
Chris Morriss