Guest TR8 STEVE Posted May 7, 2004 Report Share Posted May 7, 2004 Hi guys, I have just bought a 3.9 efi to replace my 3.5 with a webber 500 can anybody tell me what mods i need to make to go this route. I have been told bigger fuel pump and a return to tank which is a nightmare job apperently so some advise would be good. Thanks Steve... Quote Link to post Share on other sites
andrewt Posted May 10, 2004 Report Share Posted May 10, 2004 Hi Steve You will need a high pressure fuel pump. I used a Sierra Cosworth pump mounted on the rear bulkhead, gravity fed from the tank. You will also need a 1/2" bore supply to the pump & return to the tank. S&S Preparations will sell you a tank modified with a swirl pot internally and a 1/2" supply line etc, you can use the original fuel pick up as a return. The S&S tank is a good way to go if you are not confident in modifying your own tank. Also note the Vitesse/Range rover plenum chamber will not fit under a standard Tr8 bonnet if you use the standard Tr8 subframe & mounts. S&S say their lowered subframe will allow it all to fit. All the other clearance problems etc are as per usual. The torque increase is substantial so it is a good mod to do go for it. Andy Quote Link to post Share on other sites
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