How does 6 = 8 on a V8 REV LIMITER?

[powerband]

The Pertronix "Ignitor III" HEI module has built in REV Limiter. The module is able to be set from 4000 to 9000 RPM limit.
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BUT - the limiter is designed for V8 not selectable like a Tachometer. Both a Tach and Rev Limiter simply count number of Plug Firings to calculate RPM.
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THEN - If the Rev Limiter is set for 4K RPM LImit for the V8 plugs firing count , at what RPM will the SIX Plug Firing Count match the number of Plug Firing of the setting for V8- 4K Limit?.
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PerTronix D72000 Flame-Thrower HEI III GM 4 Pin Module with multiple sparks and digital rev-limiter

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This has been confounding me since realizing the Pertronix module has no provision for alternates to V8 like the 4/6/8 switch on a cheap Tach.'.
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have fun
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[jgregg13]

4000 (v8 setting) x 8 / 6 = 5333 rpm (6 setting)

 

[guhfluh]

4000 (v8 setting) x 8 / 6 = 5333 rpm (6 setting)

Yep,

(8cyl RPM) x 1.33 = (6cyl RPM) for the rev limiter.

 

[powerband]

BZZZZ - U got - it !
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... very thankful that's what I came up with too, shows how fast you guys can think ! .
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have fun
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[DON]

I was thinking set it at a low rpm, and see where it starts limiting the rpm, then work up to where you want it.
The non-mathematician method