Diesel crank... worth it?

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  • digger
    R3V Elite
    • Nov 2005
    • 5911
    #16
    lightening the crank is a waste of time, money and effort!!!

    Its inertia that you want to minimise and since the flywheel is a big source of this and its cheaper and easy to lighten a flywheel why not just do that?
    89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

    new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

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      • pdx 528e
        Noobie
        • Jun 2006
        • 33
        #17
        FWIW the td cranks have lived their entire lives @ ~20:1 compression whereas the eta cranks have been babied @ 9:1 compression. If tuners used td cranks for their strokers, I would guess they were going with new hardware. My .02 is that an eta crank is better if you are going with a used one.

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          • digger
            R3V Elite
            • Nov 2005
            • 5911
            #18
            but TD cranks are designed to take 17-20:1 the Eta aren't designed for >6500rpm.
            89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

            new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

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              • mrsleeve
                I waste 90% of my day here and all I got was this stupid title
                • Mar 2005
                • 16385
                #19
                Originally posted by digger
                lightening the crank is a waste of time, money and effort!!!

                Its inertia that you want to minimise and since the flywheel is a big source of this and its cheaper and easy to lighten a flywheel why not just do that?
                yeah I have been thing about that alot since I posted before. I think just balancing for the crank and run a really light fly.
                Originally posted by Fusion
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                  • Reynard38
                    Advanced Member
                    • Sep 2006
                    • 103
                    #20
                    Originally posted by Swede-E30
                    188.8rwhp and 181.5rw lbft. I am running 10.2:1 compression so it may vary depending on set up.

                    -Martin
                    Can you tell me what pistons you are running to get this C/R? Also did you deck the block and if so by how much?
                    1997 Porsche Carrera "S" The Mistress
                    1988 BMW R100RS "Ultimate Airhead"
                    1987 325is Daily driver and tracktoy with a growing list of mods.

                      Comment

                      • nando
                        Moderator
                        • Nov 2003
                        • 34827
                        #21
                        Originally posted by digger
                        the Eta aren't designed for >6500rpm.
                        neither is the TD crank
                        Build thread

                        Bimmerlabs

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