Is One Better Than The Other & Why?
What do you think about this chamber and plug placement?Thats a very good article.
The first thing that really stood out was that first picture that was posted showing quench area. While the chamber shape is nice, spark plug location is not that good. And for most 23 degree SBC heads it’s never very good.
My point is even with proper quench (if you can get it and not get the compression ratio higher than needed) some of these chambers have only decent to horrible spark plug locations.
And spark plug location is a HUGE factor in ignition spark angle (timing).
https://www.speednik.com/files/2019...iston-and-head-2019-03-23_15-55-21_659850.jpg
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I couldn’t get the picture of the Chevy head from the article to post but you can click on the link to see it.
Compare the spark plug location of both heads and you‘ll notice how high up in the chamber the Chrysler plug is compared to the Chevy chamber.
That high plug placement means less total timing and a completely different curve than the SBC head. Also, you can get a bigger dome in the Chrysler before the flame front is impeded than you can with the SBC, or even the BBC.
As Darin Morgan says, NA you do everything you can to speed up the burn rate because faster is better (to a point) but with a power adder you do whatever you can to SLOW the burn rate down to keep it out of detonation.