Shackleton Posted September 22, 2006 Share Posted September 22, 2006 Wow - I've been/am on a few other forums (with good people) but the technical stuff here is second to none, right down to the photo documented step by step guides posted by folk! I love this place... I've a '73 RR, it's the biz, it's like a mountain goat. All original, twin strombergs on the 3.5, LT95 etc. I bought a scrapper 1990 3.9 as a donor and I've gotten to the point that tomorrow I'll route the wiring for the new motor, do some last bits of cleaning and painting and I'm ready to pull the 3.5 and offer up the 3.9. Apart from having major 11th hour jitters about whether I'm doing the right thing going ECU controlled (I've done all my sums and reckon that with the weight difference and the o/d that I'm putting on I should get about 20mpg) I have two main questions for anyone with any experience in the area... 1. My mech tells me that basically if I connect the white ECU wire to my ignition switch and basically earth the earth that I just need to use the existing wiring to the alternator/starter etc to get the thing running. (this is all considering that I've stripped all the relevant fuel pump/injector loom with the ECU) God that doesn't make sense does it... 2. I'm not interested in the power steering fitted to the 3.9, I'd much prefer to keep the few hp that the pump would have soaked up. So I've dumped the pump. I'm going to mount the alternator on the opposite side of the waterpump and run it from the w/p pully as its only slightly bigger then the p/s pump pully. But now I'm wondering whether that few mill of difference in the pully is gonna burn out the alternator or have any other adverse effect??? I'm George by the way, hi! Quote Link to comment Share on other sites More sharing options...
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