[HWYSTR455]

Originally Posted by steve25

With the 061 heads chamber you will need more octane then would be associated with any similar compression run in any other D port head.

Can you elaborate on that for me please Steve? Would like to understand the basis of that statement? Like, for what, to produce the same amount of power, or to reduce det compared to a chamber with a pad?

Think there's more to it than just the chamber design (as it pertains to the pad). Like, if this were a requirement, why then is the hemi head so successful?

I've had engines with no quench pad chambers and no issues with det. Personal experience. I've had engines with pistons in the hole that were successful. There are other makes, a number of them, with no pads in the chambers, which are/were successful. So to say it's going to ping like a pig without quench I believe is an incorrect blanket statement.

Now, I would agree that most likely, a chamber with a tight/aggressive quench pad would probably make more power, or be more efficient. Now by how much more I'm not sure, but doubt it would make for a pass/fail situation.

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