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**truckster** · 01-18-2018, 12:31 PM

Hot Rod magazine did a comparison years ago where they built a SBC 400 and BBC 402 to be as nearly identical as possible - similar compression ratios, cam profiles, etc. Then they tested the two motors side by side. Their conclusion was that you're going to get more torque from the big block and better mileage from the small block. The numbers were close, but that was the result.

01-18-2018, 12:31 PM	#11
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,804	Re: To Big Block...Or Not to BBC..... Hot Rod magazine did a comparison years ago where they built a SBC 400 and BBC 402 to be as nearly identical as possible - similar compression ratios, cam profiles, etc. Then they tested the two motors side by side. Their conclusion was that you're going to get more torque from the big block and better mileage from the small block. The numbers were close, but that was the result. __________________ I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson