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Steve & Nancy Riffe
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Date:  5-1-2015
Number of Hours:  1.00
Manual Reference:  
Brief Description:  MAP Sensor-restrictor

I wanted to get the MAP sensor installed or at least located before I settled on location for the shunt/ANL. The MAP sensor line needs some sort of restrictor in the line otherwise the engine pulses can result in an erratic manifold pressure reading. Some builders have installed a restrictor at the engine, but I made a restrictor to go in the other end. This way it is not possible for the restrictor to get sucked into the engine. I squeezed an AN470AD5 rivet until it was a press in fit for the AN fitting with a hose connection. I went thru 5 rivets until I got the right length and proper amount of squeeze to fatten it up. I found you need a fairly short rivet, otherwise it tends to clench over. After I got a good press in fit, I drilled a #60 hole thru the rivet. I assembled the fittings and sensor—now I’ll decide on placement on the firewall.
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Squeezing -5 rivet

Squeezing -5 rivet

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Drilling #60 hole in rivet

Drilling #60 hole in rivet

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Connection to the MAP sensor

Connection to the MAP sensor

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