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PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Race > 2.3 HP per cu. in. ??????????
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  #1  
Old 03-07-2016, 01:27 AM
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Stan Weiss Stan Weiss is offline
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Ahem, so in the V8 pursuit of exceeding 2.3 hp/cid, the notion of dual spark plugs comes to my mind.

a pilot was telling me about the rpm change you can hear when checking ignition to the spark plugs. Prime plug or redundant plug will both run a lower rpm than both plugs firing.
So that says something about the wet chemistry within a big bore.

Has there been PMD heads that have investigated dual sparkplugs?

not like a 2nd spark plug doubles the HP, but that would be a funny on someone, someday.
Mark,
Not to say 2 plugs is not a good thing. But if I am reading how the test was done it shows a greater HP drop then is really there. Unless you advanced the timing when running one plug to optimized conditions.

Stan

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Old 03-07-2016, 09:03 AM
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Mark,
Not to say 2 plugs is not a good thing. But if I am reading how the test was done it shows a greater HP drop then is really there. Unless you advanced the timing when running one plug to optimized conditions.

Stan
both magnetos set for best cruise power, intended to fire at same timing.

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Old 03-07-2016, 10:41 AM
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both magnetos set for best cruise power, intended to fire at same timing.
Mark,
I do not know this engines configuration. But I do know from years ago working on the Chrysler 426 / Gen II hemi heads, that running the 2 plugs required less total timing than when the same engine / heads was run using only one plug. The flame front burn time is still the same but in the direct where the second plug was you now have a great distance for the flame front to travel.

Stan

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Old 03-07-2016, 07:34 PM
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So when is the race between Langer and Leech????????????? Bets anyone??? LOL

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Old 03-07-2016, 07:43 PM
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So when is the race between Langer and Leech????????????? Bets anyone??? LOL
He won't race me for money. Must have zero confidence in either his driving, tuning or the rods staying in the oil pan...

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Old 03-07-2016, 07:49 PM
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He won't race me for money. Must have zero confidence in either his driving, tuning or the rods staying in the oil pan...
You will race me for free. Get your excuse is ready

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Old 03-07-2016, 07:52 PM
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I haven't run a dewco center section in years. As with everything you are a little behind the times.

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Old 03-07-2016, 07:49 PM
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lol

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