M30 turbo just snapped a rocker, top end advice?

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  • Lurker27
    E30 Modder
    • Jul 2007
    • 821

    #16
    This happened pulling out at 2500rpm, and I had just set the lash to 0.008 @ the cam cold - maybe a bit tight, but that should run poorly + burn valves, not snap a rocker. TBH I honestly think it was just mechanical failure, was running like a champ right before it happened.
    '89 335is +turbo

    Comment

    • The Humjet
      E30 Addict
      • Jun 2010
      • 528

      #17
      For the valve springs you best go to a good engine shop and have them check your spring pressures and let them decide what you should do. When I say go to a good engine shop I mean real GOOD I work at one and I've seen some big Fuck ups by other shops who have been in the business for over 40 years. They should have the special equipment to precisely check your valve springs. You might as well do it while your getting your head blue printed. And let them recommend you a place that does good cam regrinds.
      That's what I'd do anyway.

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      • Lurker27
        E30 Modder
        • Jul 2007
        • 821

        #18
        I shopped around cam shops and am going with IE, they quoted me a reasonable price and seem knowledgeable. I'll be running a turbo cam with a bit more lift than a schrick, hopefully. M30 heads are pretty lift limited on valve curtain area, so it should pick up some nice power. I'll have them recommend valve springs, I think, the whole package from there won't be too bad. If my clutch holds maybe I can crack 600rwhp on 22psi+93+meth
        '89 335is +turbo

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        • browntown
          No R3VLimiter
          • Jun 2004
          • 3524

          #19
          call paul burke to discuss, you can find his number somewhere on mye28

          I can't think of anyone who knows the m30 better, that is so available as paul

          Comment

          • The Humjet
            E30 Addict
            • Jun 2010
            • 528

            #20
            600whp Wow!
            What are you trying to do get your front wheels off the ground?
            You should be fine with stock springs. Even though schrick recommend upgraded valve springs with their cams you can still get away with stock springs as long as your rev limiter is under 7000rpm

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            • CHIF8008
              No R3VLimiter
              • Nov 2010
              • 3447

              #21
              600 whp sounds good to me :D i would not be complaining haha
              -FREEDOM- is cruisin at 80, windows down and listening to the perfect song-thinking "this is it"
              -The Beauty in the Tragedy-
              MECHANIC SMASH!!- (you all know you do it)
              Got Drop?? ;-)
              Originally posted by JinormusJ
              But of course
              E30s are know to be notoriously really really really ridiculously good looking

              Comment

              • Lurker27
                E30 Modder
                • Jul 2007
                • 821

                #22
                Originally posted by browntown
                call paul burke to discuss, you can find his number somewhere on mye28

                I can't think of anyone who knows the m30 better, that is so available as paul
                Paul is definitely awesome, but I was trying to keep this to a budget. His stuff would be slightly spendier, I think, though his turbo cam was a good deal last I checked.
                '89 335is +turbo

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                • euro2fast4u
                  Banned
                  • May 2009
                  • 545

                  #23
                  I wanna ride in this thing soon. You think it will be up and running by winter

                  Comment

                  • Lurker27
                    E30 Modder
                    • Jul 2007
                    • 821

                    #24
                    I was hoping to have it running well again before they salt the roads, but until all my stuff gets in, it's hard to say how fast it can be done. First time pulling the head for me.
                    '89 335is +turbo

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