Tom1809 Posted May 21, 2012 Share Posted May 21, 2012 Hi chaps. I've got myself in to a bit off a mess, normally I would ask my mate how to set it up but he's in holiday so I'm wondering if someone on here here could help me out what I need. So here's the low down - defender 90 - td5 plastic tank mounted - 3.9 rover v8 megasquirted - external fuel pump ( http://www.ebay.co.uk/itm/110489807832?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_4388wt_1108 ) Right the bits I'm struggling on is, what sender do I need as I can't use the td5 one, what size pipe work do I need for flow and return. Is it worth having a low pressure pump and a swirl pot to feed the hp fuel pump? Where can I get all the hoses from and fittings?where is the filter normally located on a v8 90? I would guess the hp pump after it. Sorry for all the questions Thanks Tom Quote Link to comment Share on other sites More sharing options...
Dave W Posted May 21, 2012 Share Posted May 21, 2012 You can use a 300TDi Discovery in tank unit (plastic tank version), it doesn't have a built in swirl pot but that shouldn't be a problem unless you run low fuel levels off road. There is a RoW tank unit that does have a swirl pot, designed for use with a 300TDi engine in a Defender with a TD5 style tank, that would probably be ideal. I use the 300TDi Disco one on SWMBO's 90 as I'm using an external pump for the TD5 but I used it because a mate had a scrap Disco so it was free An easier way still is to discard the external pump and use a V8 in tank pump unit from a Discovery or P38. If you use one form a Thor engined vehicle, be aware that the fuel rail will need to be modified slightly as the regulator is built into the pump with no return pipe. I used a P38 4.6 pump/sender unit and modified it to fit (the 90 tank isn't as deep as a P38 tank so it needs to be shortened - not a difficult job. I used this method when I was running a 3.9 V8 from a TD5 tank. 8mm I/D pipework is "normal" for V8 systems and the 300TDi unit uses the same size. Quote Link to comment Share on other sites More sharing options...
Dave W Posted May 21, 2012 Share Posted May 21, 2012 One other thing, do yourself a BIG favour and make sure you can access the tank unit without taking the tank out of the vehicle. Cut an inspection hatch in the floor if needed. Quote Link to comment Share on other sites More sharing options...
Tom1809 Posted May 22, 2012 Author Share Posted May 22, 2012 Cheers Dave w, I ll put a post in the wanted section now, I would of gone the in tank pump route but I had already brought the fuel pump Quote Link to comment Share on other sites More sharing options...
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