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The "Cocktail engine" starting to take form

Moderator: David Vizard

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The Iron Icon
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The "Cocktail engine" starting to take form

Post by The Iron Icon » Sun Sep 01, 2019 12:01 pm

Well guys, starting to get parts together for the build. Needless to say I have an interesting mix of rockers. Low ratio for Ex and high for In. Advertised ratios are from 1.5 to 1.72. Real ratios are alot different from that. They range from 1.566 to 1.78. Now for the good question anyone want to donate 2 springs? Got 14 beehives from a set part # comp 26918.
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Re: The "Cocktail engine" starting to take form

Post by David Vizard » Fri Sep 06, 2019 4:33 pm

OK need some input here.

We have an assortment of rods that is 4 at 5.4 long and 4 at 5.09 long.

Any idea's as to how these should be placed in the engine to get the best balance??

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Re: The "Cocktail engine" starting to take form

Post by MadBill » Fri Sep 06, 2019 11:10 pm

I'd alternate long/short in the F.O. sequence, because...well, just because.

I guess the budget wouldn't run to spinning up the short block with various combos and evaluating relative roughness?
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Re: The "Cocktail engine" starting to take form

Post by Stan Weiss » Sat Sep 07, 2019 12:57 pm

I would put the 4 at 5.4 long in one bank and the 4 at 5.09 long in the other bank.

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Re: The "Cocktail engine" starting to take form

Post by MadBill » Sat Sep 07, 2019 5:46 pm

On second thought, I'd alternate long/short on each crank throw.
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Re: The "Cocktail engine" starting to take form

Post by MadBill » Sat Sep 07, 2019 5:49 pm

Or, if balancing is in the budget, pairs of shorts and longs per journal, with bobweights matched accordingly.
Felix, qui potuit rerum cognscere causas.

Happy is he who can discover the cause of things.

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