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Jeff Lee · 09-21-2010, 07:04 PM

On the subject of Z-28's...if a smaller diameter main journal is better for less frictional loss and therefore performance, why did Chevrolet increase the size in 1968? And it seems the "large journal" is a selling point (same with the rod journals). Is the "small journal" SBC that weak?

09-21-2010, 07:04 PM	#10
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Can you settle an argument? On the subject of Z-28's...if a smaller diameter main journal is better for less frictional loss and therefore performance, why did Chevrolet increase the size in 1968? And it seems the "large journal" is a selling point (same with the rod journals). Is the "small journal" SBC that weak? __________________ Jeff Lee 7494 D/S '70 AMX