Reply to "Seeking comments about a proposed engine spec."

George PAdmin.

95 octane in Australia is equivalent to 91 octane in the US/Canada.

Dynamic compression in the range of 7.8:1 (maybe 8.0:1) is good with that gasoline; and basically the limit with a production block.

4V&Proud

Some folks run the dynamic compression out to ~8.25:1 and get away with it. Personally I prefer a margin for error.

Scott

The 3 things I'm looking at are the intake valve opening early at 39°BTDC, the excessive 70° of overlap, and the rising torque curve that 110° LSA will create. The engine characteristics will make the car a rough idling, dry weather only, weekend cruising car. I'm curious just how that fits in with how you intend to use the car. The manifold vacuum may not be enough for the FMX auto trans or the power brake booster. The car will need stout gears (3.91:1?) and the 3000 rpm torque converter you mentioned is about right.

5/26/1912:57 PM

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