Chevrolet Corvette Stingray C7 Forum - View Single Post - The BEST Break for a new car. "very long"

Desert Rider · 09-25-2009, 09:36 PM

Darin,
My first post, but here goes. My LS-3 arrives in two weeks. I live in the Four Corners and so will be breaking in the engine at 5,500-6,500 ft elevation. I plan to find a long hill to climb (over and over), on a 4-lane road w/ 70 mph limit.

Do you recommend any changes in your "normal" break-in procedure (described above)?

Also, since I won't develop as much engine HP with only 11.73 psia ambient air pressure, do I need to run high octane (91 here) fuel? Would lower octane fuel (87) reduce engine output at this elevation? Any other impacts from low ambient air pressure?

Thanks,
DR

09-25-2009, 09:36 PM	#143
Desert Rider Drives: 2SS ABM 6M Join Date: Sep 2009 Location: New Mexico Posts: 2	High Altitude Break-in for LS-3 Darin, My first post, but here goes. My LS-3 arrives in two weeks. I live in the Four Corners and so will be breaking in the engine at 5,500-6,500 ft elevation. I plan to find a long hill to climb (over and over), on a 4-lane road w/ 70 mph limit. Do you recommend any changes in your "normal" break-in procedure (described above)? Also, since I won't develop as much engine HP with only 11.73 psia ambient air pressure, do I need to run high octane (91 here) fuel? Would lower octane fuel (87) reduce engine output at this elevation? Any other impacts from low ambient air pressure? Thanks, DR