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  • Users: PackardV8
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  1. PackardV8

    Old combustion chamber design which is new to me. What are the tradeoffs?

    I've been building engines for fifty years, but when this one came in the door, it was new to me. What were the pros/cons to a pocket combustion chamber such as this? FWIW, when ALF took over the production, they added a second plug per cylinder. The additional distributor was driven off the...
  2. PackardV8

    Estimate of gains when converting to thinner piston rings

    Greetings, eng-tipsters, We build mainly obsolete engines, including Studebaker and Packard. The Studebaker Champion was designed in 1939, a 3" bore x 4" stroke flathead, using 3/32", 1/8" and 5/32" piston rings. It will require a substantial investment in new inventory to have pistons cut...
  3. PackardV8

    Side valve flathead diesel - theoretically possible ?

    Given a first-half-of-last-century-side-valve-flathead configuration. Add turbocharging and direct injection. Would it be theoretically possible to achieve sufficient compression while still maintaining enough transfer area for the air to enter and exit the cylinder? Of course, the additional...
  4. PackardV8

    Known drag, how much horsepower and cd?

    From a 1960s road test report, a car has 160 pounds of drag at 60 MPH. How much horsepower is required at 60, 120 and 220 MPH? Is there any method of estimating the drag coefficient equal to 160# @ 60 MPH? Thanks in advance/ jack vines
  5. PackardV8

    Crankshaft material question

    Crankshafts - billet steel, forged steel, cast steel, nodular iron, malleable steel and cast iron - what else? Recently a discussion arose concerning various materials used to make crankshafts and I realize after fifty years of hefting cranks, I don't have all the facts at hand. We all know...
  6. PackardV8

    Intake/exhaust valve diameter ratio on older OHV8s

    Let's take as a given the old SBC 2.02/1.6 I/E valve diameter ratio of .792 is the norm/golden mean. It's a given a larger intake valve usually produces more high RPM power than a larger exhaust valve. I work primarily with Studebaker and Packard V8 engines. The Studebaker V8 used a .92453...
  7. PackardV8

    Can lubricant actually damage spring steel?

    From a couple of automotive replacement spring websites, If this is in fact true, can anyone explain the chemistry? jack vines
  8. PackardV8

    Undivide intake ports in 2-valve heads with paired intakes

    On a normally aspirated engine, there is an ideal intake tract length and area for a given RPM. However, for pressurized-induction, does this apply, since doesn't the manifold pressure prevent resonant tuning? It would seem so, since some supercharger intakes for OHV8 two-valve heads with...
  9. PackardV8

    Older Ford OEM camshaft specifications needed

    Greetings, Eng.Tipsters, I use a commercial DynoSim program to explain engine modifications to customers. We begin with what they have at present and show what effect new parts would have on HP/torque/efficiency curves. The aftermarket performance camshaft data is everywhere, but the OEM data...

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