What should the PSI be on a 350?

Tests indicated that all pistons had pretty close to equal PSI. My question is what the PSI should be for a healthy running 350. Mine with 150K on it tests at 180 psi and I was told that was great. What did yours show?

What should the compression of an engine be?

There is more than one school of thought; on what the compression of the average engine should be. As a general rule a compression of 135 PSI or better is excellent. Similarly, A compression of 85 PSI or lower is extremely bad. The most desirable situation is that all cylinders give the same or close to the same reading.

What should the PSI be on a compression test?

Uneven readings are not uncommon on high mileage or worn engines. Also, the difference between the highest and lowest readings, should be no more that 20%. As long as the lowest reading is 100 PSI or better; then the engine is acceptable.

How to do a compression test SBC 350?

To each corresponding cylinder number, the first value being dry test and the second value after squirting a bit of oil inside the sparkplug hole. Then a description of what the sparkplug looked like.

What should the compression rate be in a car?

Insert the compression gauge extension and screw it in. Have someone crank the engine and watch the gauge until you reach maximum compression. A healthy engine should have 100 PSI per cylinder.

What should the compression ratio be on a 454?

My 454 makes 180 psi on all eight cylinders and I’m curious what the compression ratio would be. Thanks no, cylinder pressure and compression ratio are two different things. What parts are in it? 180 is very high – this motor will need liquid dynamite to run without pinging. So many other factors.

What was the compression ratio of my Cam?

With a 10.18:1 355 and a 218/230*@.050″ cam I had 212 to 214 psi cyl. pressure and ran on 93 octane for 10 years. Now to answer the OP’s question.

What should the PSI be on a 350?