gavin.starr Posted November 30 Share Posted November 30 Im currently in the process of overhauling everything on my Supra. Brake and fuel lines have already been replaced on the car. It is also undergoing a single conversion, so therefore it is getting a larger pump in the tank, a GST400K (400lph). Now i have seen a few posts regarding running 12v and a relay. The page below Is this still the best way to do things or have other ways been established since this was posted in 2012. Also with regards to the pump hanger I belive the the electrical conector in the lid of the hanger is also a weak spot for overheating, if so what are peoples fixes for this, a beefier type of connector or a new bulkhead to run wires through? My next question is regarding the wiring what gauge wiring is required so that i can get some ordered. Thanks Gavin Quote Link to comment Share on other sites More sharing options...
jagman Posted December 1 Share Posted December 1 First the cable : use quality cable , I prefer aircraft cable due to the specs - very high temp ratings , very good insulation (good for 600 volts) flexible and impervious to just about any fluid . I will post a link to supplier but around £2-3 a meter . size 20 = 14 amps size 18 =18 amps size 16 = 21 amps ,size 14 = 31 amps and size 12 = 43 amps normal car cable ie Halfords cable is crap , Chinese cheap insulation . the original setup switched voltage 9 to 12 volts on boost . This was so at low power (idle) return to tank fuel was reduced - pressured fuel is heated and it reduced heat in the fuel tank if in traffic . Bear this in mind if using large injectors and high flow pumps . the diagram still works for any relay fitting and retains the shut off with engine not running as crash protection and the delay for a couple of seconds to prime the system for next start after switch off . just use a better connector ,to replace the OEM one (higher rated.) Quote Link to comment Share on other sites More sharing options...
jagman Posted December 1 Share Posted December 1 https://www.lasaero.com/products/article/W02H1HRM5 Quote Link to comment Share on other sites More sharing options...
jagman Posted December 2 Share Posted December 2 https://www.ebay.co.uk/itm/314772948930?chn=ps&_ul=GB&mkevt=1&mkcid=28&google_free_listing_action=view_item there is a 50amp two pin connector male and female - with soldered pins so no crimp tools needed . Quote Link to comment Share on other sites More sharing options...
gavin.starr Posted December 6 Author Share Posted December 6 Cheers dude. I'll take a look. Is on my very long list of things to do so hopefully I'll get round to it soon. Quote Link to comment Share on other sites More sharing options...
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