Adam Blackaby Posted February 16, 2021 Report Share Posted February 16, 2021 Having been let down by the fuel system yet again (3rd time in 3 months) I'm looking at the possibility of converting to electric pump, regulator and inertia switch. Has anyone done this recently and can advise on location of the various components, plumbing of fuel lines etc. Also, any views on choosing a solid state pump or a Facet unit? Car is LHD if that makes a difference. Living in France I cant just 'pop down' to a local Motor factor to purchase bits of fuel hose etc. Any advice much appreciated. Thanks Adam Quote Link to post Share on other sites
jpmf Posted February 16, 2021 Report Share Posted February 16, 2021 I fitted a Huco pump on the inner wing (not sure if you have room on a LHD car) so it's easily attached to the original set-up, with an inertia switch beside it, pump is a sucker and delivers a couple of pounds pressure so no need for a regulator. I have the pump switched, for start-up for when the car has been idle for a while, and plumbed through the Delco pump. https://fastroadcars.co.uk/store/index.php?route=product/product&product_id=92&search=huco https://fastroadcars.co.uk/store/index.php?route=product/product&product_id=502&search=inertia Quote Link to post Share on other sites
RobH Posted February 16, 2021 Report Share Posted February 16, 2021 (edited) +1 for the Huco. It is sort of a modern equivalent of the old SU pump and its output pressure is suitable for the carburettors. You can buy a suitable inertia switch for about twelve pounds or less: https://www.amazon.co.uk/Inertia-Standard-Ignition-Electric-Replacement/dp/B08L35359X/ref=sr_1_6?dchild=1&keywords=inertia+switch+fuel&qid=1613501808&sr=8-6 Edited February 16, 2021 by RobH Quote Link to post Share on other sites
pfenlon Posted February 16, 2021 Report Share Posted February 16, 2021 Facet for me, obtained from TR Bitz 2018, here's a pic. Quote Link to post Share on other sites
Hamish Posted February 16, 2021 Report Share Posted February 16, 2021 +1 for a sucker huco pump and inertia switch. I have this set up on my 3a Very compatible with my twin SUs pressure wise out of the box. You need to check that your fuel delivery pipes are ok. I had fuel delivery problems in competition and I went through 2 mechanical pumps and the huco. it turned out to be a 6 inch rubber pipe joining two metal pipes towards the back of the car. Quote Link to post Share on other sites
Jase Posted February 16, 2021 Report Share Posted February 16, 2021 I'd recommend fitting two electric fuel pumps, if one breaks down you can then switch to the other. In the process of doing this on my GT. Quote Link to post Share on other sites
harrytr5 Posted February 17, 2021 Report Share Posted February 17, 2021 Yes, Huco pump. Make sure it is not the copy one from China. Guess how I found out!! Regards Harry. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted February 17, 2021 Report Share Posted February 17, 2021 22 hours ago, Adam Blackaby said: Having been let down by the fuel system yet again (3rd time in 3 months) I'm looking at the possibility of converting to electric pump, regulator and inertia switch. Has anyone done this recently and can advise on location of the various components, plumbing of fuel lines etc. Also, any views on choosing a solid state pump or a Facet unit? Car is LHD if that makes a difference. Living in France I cant just 'pop down' to a local Motor factor to purchase bits of fuel hose etc. Any advice much appreciated. Thanks Adam Local - ish suppliers for you. Facet rather than Huco. Be aware of the maximum fuel pressure that SU carbs like It is probably under 4 psi.so a regulator might be required with Facet item. (Pression : 4 - 7 Psi / 0,28 - 0,48 bar) https://www.oreca-store.com/vehicule/moteur/circuit-d-essence/pompe-a-essence/facet.html or https://www.mecatechnic.com/fr-FR/pompe-a-essence-electrique-facet-12v-0-28-a-0-48-bar_UC43514.htm They ought to be able to do you with a length of suitable fuel proof hose too TSH Used to sell the hell out of the Facet square solid state pumps. Here is an Hitachi pump in Lithuania https://www.ebay.fr/itm/HITACHI-ELECTRIC-FUEL-PUMP-FEED-UNIT-133010-P-NEW-OE-REPLACEMENT/154326325524?_trkparms=aid%3D1110009%26algo%3DSPLICE.COMPLISTINGS%26ao%3D1%26asc%3D20200220094952%26meid%3D169b58e0e97044c98bfec7fd897da134%26pid%3D100008%26rk%3D1%26rkt%3D12%26sd%3D360758769989%26itm%3D154326325524%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3Ddefault%26brand%3DHitachi&_trksid=p2047675.c100008.m2219 Peter W Quote Link to post Share on other sites
PhilipB Posted March 3, 2021 Report Share Posted March 3, 2021 +1 for Huco Pump and Malpassi filter/regulator BTW Huco is now owned by Hitachi As added safety measure, also consider fitting Huco 132020 fuel pump relay. It picks up a feed from the -ve terninal of the coil such that if the engine stalls, ie stops rotating, the relay cuts the power to the pump Phil Quote Link to post Share on other sites
Sulzer 12LDA28C Posted March 3, 2021 Report Share Posted March 3, 2021 When my TR4 was seriously upgraded powerwise way back in 1990 a Facet fuel pump was fitted and remains to this day. Only failed twice and it is such a simple fix - a tap with a spanner or small piece of metal and then ok. Quote Link to post Share on other sites
Tr4aJim Posted March 4, 2021 Report Share Posted March 4, 2021 (edited) Facet pump in my TR4A, and an inertia switch too. Read the instructions with the Facet pump as it has to be mounted with the correct orientation. Also I put a fuel filter between the tank and the pump. Jim Edited March 4, 2021 by Tr4aJim Quote Link to post Share on other sites
trchris Posted March 4, 2021 Report Share Posted March 4, 2021 Are additional regulators fitted to these pumps? or is the pressure regulated by the pump? Chris Quote Link to post Share on other sites
woodward Posted September 7, 2023 Report Share Posted September 7, 2023 I know this is an old thread but I am looking to replace my mechanical SU pump with a Huco one as I'm fed up with the leaks on the cover of the SU. I plan to wire the pump off the coil using the Huco 132020 fuel pump relay but this seems to be unavailable at the moment. I assume that there is a generic version of this relay which looks to be 5 pin - can someone more knowledgeable point me to an alternative relay I would fit in place of the Huco one? Thanks Myles Quote Link to post Share on other sites
RobH Posted September 7, 2023 Report Share Posted September 7, 2023 (edited) Any automotive relay will do - there's no need to use the Huco one. The Huco 132020 is ignition controlled but you can do that with any relay by connecting the relay coil to the ignition supply and using a separate feed to the pump via the relay contacts. However it is important that you also install an inertia cut-off switch, so that in the event of a collision or inversion the supply to the pump will be cut off irrespective of the ignition. Edited September 7, 2023 by RobH Quote Link to post Share on other sites
woodward Posted September 7, 2023 Report Share Posted September 7, 2023 Thanks Rob however if I want to wire the relay from the coil so that the pump cuts out when the engine stalls etc can I wire the green wire in your diagram above from the coil or do I need a special relay for this? Given that the feed will be going on and off, albeit quickly. Quote Link to post Share on other sites
RobH Posted September 7, 2023 Report Share Posted September 7, 2023 Just now, woodward said: however if I want to wire the relay from the coil so that the pump cuts out when the engine stalls etc You can't really do that without great complication - the power remains on the ignition circuit if the engine stalls so you would somehow have to sense the lack of engine rotation and that makes it difficult when starting the engine because the pump won't run at first..... I can't see any reason to want it actually. If the engine stalls it stops using fuel and the Huco pump won't pump any more once the float chambers are full. It is a diaphragm pump like the SU type and the contacts that operate the pump solenoid only 'make' when the fuel pressure drops. It doesn't pump continuously. Quote Link to post Share on other sites
stuart Posted September 7, 2023 Report Share Posted September 7, 2023 2 hours ago, RobH said: You can't really do that without great complication - the power remains on the ignition circuit if the engine stalls so you would somehow have to sense the lack of engine rotation and that makes it difficult when starting the engine because the pump won't run at first..... I can't see any reason to want it actually. If the engine stalls it stops using fuel and the Huco pump won't pump any more once the float chambers are full. It is a diaphragm pump like the SU type and the contacts that operate the pump solenoid only 'make' when the fuel pressure drops. It doesn't pump continuously. Use an oil pressure switch as a cut out. No pressure no pump. Stuart. Quote Link to post Share on other sites
RobH Posted September 7, 2023 Report Share Posted September 7, 2023 Good point Stuart - yes that would work though really I still don't see any need with the Huco. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted September 7, 2023 Report Share Posted September 7, 2023 Got my Metro Turbo cheaply because the engine cut out when hot. The problem was the oil pressure switch was cattled. New switch fixed it, until the rear engine mount bracket broke then the lay gear went bang. Still sold it for a profit. You could observe the oil pressure light coming on just before the engine cut out. Quote Link to post Share on other sites
rcreweread Posted September 7, 2023 Report Share Posted September 7, 2023 Adam - how come three fuel pumps have failed in 3 months - were they all repros? By all means fit an electric pump and associated wiring etc, but I'm not aware of reliability problems with original AC Delco pumps, and reconditioned pumps from Dave Davies should be fine - if you haven't got an OE one , I have a few left I am prepared to sell outright - see my response to Mile's post in the technical forum Cheers Rich Quote Link to post Share on other sites
rcreweread Posted September 8, 2023 Report Share Posted September 8, 2023 8 hours ago, rcreweread said: Adam - how come three fuel pumps have failed in 3 months - were they all repros? By all means fit an electric pump and associated wiring etc, but I'm not aware of reliability problems with original AC Delco pumps, and reconditioned pumps from Dave Davies should be fine - if you haven't got an OE one , I have a few left I am prepared to sell outright - see my response to Mile's post in the technical forum Cheers Rich Whoops - only just noticed the original post was three years ago -sorry! Cheers Rich Quote Link to post Share on other sites
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