[TR] Electric Fuel Pump

[Dave]

 It doesn't keep the fuel cooler but it does reduce the opportunity for vapor lock.  That is because the bulk of the fuel line run is under pressure rather than a slight depression.  The assumption is that the temps in the trunk are lower than in the engine bay and the short run from the tank to the pump will be cooler.

Driving the pump off of the oil pressure switch will reduce the chance of flooding a stalled engine. The Carb'd TR8 has a three terminal oil pressure switch and will run the pump whilst cranking to fill up the float bowls more quickly.  Most modern cars (including the TR8) have an impact switch that will switch off the pump in the event of a crash.  An additional safeguard.  You can use any impact switch found in a wrecking yard and they are cheap and abundant.


Dave Massey


 

 

-----Original Message-----
From: Hoyt Duff <hoytduff at gmail.com>
To: triumphs <triumphs at autox.team.net>
Sent: Sat, Aug 8, 2015 9:42 am
Subject: Re: [TR] Electric Fuel Pump



I'm not sure I understand
how "... it can be installed in the trunk,
keeping the fuel cooler" actually
works to keep the fuel cooler.

Also , for safety reasons, an electric fuel
pump should be powered
through a relay that is driven by a two-terminal oil
pressure sensor.
With that, a non-turning engine (especially in the event of a
wreck)
won't continue to have fuel pumped to it.



-- 
Hoyt



 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/triumphs/attachments/20150808/0d3f352e/attachment.html>