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  1. tigretr

    AMODEL type A/B plastic for intake manifold?

    Interesting concept. I would recommend you stay away from phenolic, especially fiberglass reinforced. From a functionality standpoint I am confident it can survive the fuel / heat environment and possibly the pressure of a blower if it were thick enough, but you will need a boat load of end...
  2. tigretr

    How much volume is delivered by a "High Volume" oil pump?

    I am building a 1.8L motor with many new mods that require extra oil (Turbo, lifter spray bar) and I am trying to decide if my pump can deliver enough volume to do the job. What I am looking for are some benchmark numbers (Gpm,Lpm,...) . The words "High Volume Pump" are so often thrown around...
  3. tigretr

    Any input on this idea for reducing spun rod bearings is welcome.

    MNRaptor, The "optimum" position of the oil holes on the rod journal is not necessarily a fixed number of degrees before or after TDC. The angle of maximum force on the bearing is a function of camshaft, timing, fuel, ... etc and is obviously motor specific. However as a general rule we use a...
  4. tigretr

    Any input on this idea for reducing spun rod bearings is welcome.

    Have you looked into the timing of the oiling relative to TDC? In very high performance applications if the rod bearing is lubricated too early or too late relative to combustion, the oil film is not at its optimum thickness and thus bearing / journal contact is more likely to occur. Also...
  5. tigretr

    Turbo 1.8L Plenum vs. 1 into 4 performance concerns

    I am building a Sunbeam Alpine 1.8L turbo motor and am currently trying to decide whether I should build a plenum to distribute the charge or would it be better to build essentially a reverse header 1 into 4 and force the air directly into each port. Conceptually I would think more flow and...

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