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  • #16
    Originally posted by 95SleeperAcheiva View Post
    disappointing. When I got money, if, I will make an Olds 3.5 DOHC fly. In the mean time, anyone got a complete 4.0L aurora drivetrain to sell? I need it for my sillouette mini-van. Oh and a M-90 blower too. Its fun to be demented.
    If you want to supercharge an Aurora engine, go with an MP112...
    Current:
    \'87 Fiero GT: 12.86@106 - too dam many valves; ran 12.94 @ 112 on new engine, then broke a CV joint
    \'88 Fiero Formula: slow and attention getting; LZ8 followed by LLT power forthcoming
    \'88 BMW 325iX: The penultimate driving machine awaiting a heart transplant

    Gone, mostly forgotten:
    \'90 Pontiac 6000 SE AWD: slow but invisible

    Comment

    • #17
      YES! and the fellow demented arrive! Will, what have you done with a aurora motor?
      sigpicHow to make High performance Emissions:
      A "true" High flow converter, straight pipe.
      Low/No flow EGR valve, block off plate.
      Carbon canister and purge valve mod, place in large 30 Gallon can, cover, and place curbside, the city will do the rest.
      PCV valve and vent tube, reroute to exhaust to dump where it belongs, on the ground. Or add breathers and let it all free.

      Comment

      • #18
        I put a 4.6 in my Fiero.
        I'm just saying that the M90 will be too small for a 4 litre engine that can actually breathe.
        Current:
        \'87 Fiero GT: 12.86@106 - too dam many valves; ran 12.94 @ 112 on new engine, then broke a CV joint
        \'88 Fiero Formula: slow and attention getting; LZ8 followed by LLT power forthcoming
        \'88 BMW 325iX: The penultimate driving machine awaiting a heart transplant

        Gone, mostly forgotten:
        \'90 Pontiac 6000 SE AWD: slow but invisible

        Comment

        • #19
          Originally posted by Will'sFiero View Post
          I put a 4.6 in my Fiero.
          I'm just saying that the M90 will be too small for a 4 litre engine that can actually breathe.
          Even ported?
          Links:
          WOT-Tech.com
          FaceBook
          Instagram

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          • #20
            No way. You can't even use the M90 on a 3.4 DOHC without limiting it severely. If it comes from a 3800, you probably don't want it.
            Ben
            60DegreeV6.com
            WOT-Tech.com

            Comment

            • #21
              Originally posted by ForcedFirebird View Post
              Even ported?
              Correct. It only works on 3800's because the engine doesn't breathe for jack. The 3800 guys also run it WAAAYYYY beyond the limits of its usefulness.

              It's much better to go with a bigger blower. It wouldn't even be a question if we were talking about a T25 instead of an M90, but the principle is the same.

              A Whipple, of course, would be even better than the 112, but then you're starting to talk money.
              Current:
              \'87 Fiero GT: 12.86@106 - too dam many valves; ran 12.94 @ 112 on new engine, then broke a CV joint
              \'88 Fiero Formula: slow and attention getting; LZ8 followed by LLT power forthcoming
              \'88 BMW 325iX: The penultimate driving machine awaiting a heart transplant

              Gone, mostly forgotten:
              \'90 Pontiac 6000 SE AWD: slow but invisible

              Comment

              • #22
                Yeah, I forget how much the DOHC motors can breathe. The M90 works good on a gen1.
                Links:
                WOT-Tech.com
                FaceBook
                Instagram

                Comment

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