Will a 2.9x LSD improve my fuel economy?

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  • BenM
    R3VLimited
    • Nov 2006
    • 2184
    #16
    I've heard 27-30. 4V per cylinder is a lot more efficent.
    Originally posted by BillBrasky
    E36's are the Stephen Baldwin of the 3 series family. They barely hold everything together and they only sold a lot because of the popularity of their older sibling.
    1991 318i Alpine II - S50/5-lug swapped - track car
    1989 325i Cirrusblau - Daily
    1970 2500 - Malaga over Grey Cloth
    2012 F350 6.7PSD

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      • Turf1600
        R3V OG
        • Nov 2006
        • 9815
        #17
        Originally posted by BenM
        I've heard 27-30. 4V per cylinder is a lot more efficent.

        Cool. So an m50 plus 3.25 = :)

        Time to start gathering parts!
        "We praise or find fault, depending on which of the two provides more opportunity for our powers of judgement to shine."

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          • Turf1600
            R3V OG
            • Nov 2006
            • 9815
            #18
            Hey - which gets better mileage - vanos or NV?
            "We praise or find fault, depending on which of the two provides more opportunity for our powers of judgement to shine."

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              • Mot
                45 toting redneck
                • Jul 2004
                • 4018
                #19
                my vanos m52 with m50 manifold, 21.5lb injectors, and obd1 AA chip with a ZF/3.25 combo churns in around 29mpg on the freeway ~75-80. Mixed hard driving I never dipped below 20mpg combined and that was with alot of WOT driving.

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                  • Turf1600
                    R3V OG
                    • Nov 2006
                    • 9815
                    #20
                    Originally posted by Mot
                    my vanos m52 with m50 manifold, 21.5lb injectors, and obd1 AA chip with a ZF/3.25 combo churns in around 29mpg on the freeway ~75-80. Mixed hard driving I never dipped below 20mpg combined and that was with alot of WOT driving.
                    That's impressive. Maybe now I can somewhat justify the cost.
                    "We praise or find fault, depending on which of the two provides more opportunity for our powers of judgement to shine."

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                      • ldsbeaker
                        No R3VLimiter
                        • Aug 2004
                        • 3098
                        #21
                        Originally posted by Turf1600
                        Seems like I could just swap out the ring and pinion gears.
                        OT: Really? Can I do that?
                        Let's just say that I have a couple 2.93 LSD's laying around, and a 3.73 open diff. Can I make a "hybrid" 3.73 LSD?
                        Slicktop City!

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                          • Turf1600
                            R3V OG
                            • Nov 2006
                            • 9815
                            #22
                            Originally posted by ldsbeaker
                            OT: Really? Can I do that?
                            Let's just say that I have a couple 2.93 LSD's laying around, and a 3.73 open diff. Can I make a "hybrid" 3.73 LSD?
                            You can send me one of the 2.93's with the wheels :)

                            PS - you have email

                            I don't know the details about swapping gears - but i know it can be done.
                            "We praise or find fault, depending on which of the two provides more opportunity for our powers of judgement to shine."

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                              • delatlanta1281
                                Dart Master
                                • Mar 2006
                                • 10317
                                #23
                                Originally posted by Turf1600
                                My I carry only my backpack and skateboard.
                                Skateboard FTMFW!
                                Yours truly,
                                Rich
                                sigpic
                                Originally posted by Rigmaster
                                you kids get off my lawn.....

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                                  • Turf1600
                                    R3V OG
                                    • Nov 2006
                                    • 9815
                                    #24
                                    Originally posted by delatlanta1281
                                    Skateboard FTMFW!
                                    Which reminds me - I have some lakais back there too.
                                    "We praise or find fault, depending on which of the two provides more opportunity for our powers of judgement to shine."

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                                      • PiercedE30
                                        R3V Elite
                                        • Apr 2005
                                        • 4220
                                        #25
                                        Originally posted by ldsbeaker
                                        OT: Really? Can I do that?
                                        Let's just say that I have a couple 2.93 LSD's laying around, and a 3.73 open diff. Can I make a "hybrid" 3.73 LSD?
                                        Take the LS unit out of one of the 2.93's. Take the 3.73 and remove the ring gear and put it on the ls unit and put it in.
                                        My 2.9L Build!

                                        Originally posted by Ernest Hemingway
                                        There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.

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