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Old 04-05-2019, 09:19 AM
Toobuilder's Avatar
Toobuilder Toobuilder is offline
 
Join Date: Jul 2009
Location: Mojave
Posts: 4,652
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Hydraulically it makes no difference where the regulator is physically located, so long as it is downstream of the injectors. The regulator functions by bleeding off excess pressure, so all the fuel lines from the pump output to the regulator are going to be the same pressure. Less some miniscule line losses (or an outright blockage), a pressure transducer screwed into the pump module manifold, the injector manifold, the extra port on the regulator, or a T fitting anywhere in between will all read the same.

In my case I'm using a tubular fuel rail rather than the injector distribution block that Ross offers and the regulator made more sense to mount to the firewall. As long as I was at it, I decided to mount it "through" the firewall which neatly solved the mounting issue and several extra fittings. One step further and flip the assembly around and the regulator is now on the cold side and provides an even better location for the pressure transducer. In my case it was simply packaging synergy.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
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Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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