I just put a new engine in. The exhaust system was covered I put 200 miles on it. I just left the house at 1520 mile an hour and heard a noise in my engine shock and shut off. It did start up and ran but I found out that the number one cylinder was scored as if something was in there. It does run but not smooth low compression in number one cylinder. 5-7 hemi
A “New” engine, or a new to you used engine?
Very few engines for vehicles can survive 1520 mile an hour driving.
A new crate motor or a rebuilt engine should come with a warranty.
If you can verify the cyl has scoring then you seem technically competent. Keep at it.
Define new. Brand shiny new, reman/rebuilt by ?, or salvage yard engine which is new to your car.
Low compression and a scored cylinder means an engine overhaul. Considering the cost of boring and/or sleeving a block it may not be worth it.
If that engine is a reman unit with a warranty then you may have some recourse.
Did you use the intake manifold from the failed engine on the new one? Perhaps debris trapped inside the barrel shaped manifold got into the cylinder.
I mean, you just set a land speed record. If you lost a cylinder in the process, that’s not too bad for doing Mach 2 in a Chrysler.