Compression for a Chevy 4.8 Engine
The stock compression ratio for a Chevy 4.8 engine is approximately 9.5:1. This is the static compression ratio, which is a key factor in determining the engine’s performance and efficiency.
If you have any more questions or need further assistance, feel free to ask!
Contents
- What is good compression for SBC?
- What is the lowest acceptable compression?
- Is a 4.8 Vortec a LS motor?
- Is 150 engine compression good?
- How much HP can a 4.8 handle?
- Is 120 compression good?
- Is the 4.8 and 5.3 the same engine?
- What is the best turbo for a 4.8 LS?
- Is the 4.8 Vortec a good engine?
- Is 120 compression bad?
What is good compression for SBC?
A compression reading of 150 PSI is reasonable and normal.
What is the lowest acceptable compression?
But a good rule of thumb says that each cylinder in a mechanically sound engine should have compression of 130 psi or higher. While I’ve seen some people claim 100 psi is sufficient, the gearheads and other sources I’ve consulted consider that too low. In addition, you want consistency from one reading to the next.
Is a 4.8 Vortec a LS motor?
The 4.8L and the 5.3L are smaller truck versions of the LS1 and were designed to replace the 305 and the 350 in trucks. The 4.8L and 5.3L engines share the same Gen III LS-series engine block and heads (upper end) and therefore, most parts interchange freely between these engines and other variants in the LS family.
Is 150 engine compression good?
150 psi is considered a good compression. Low compression is lower than 130. The cylinder should be within 10%.
How much HP can a 4.8 handle?
Can make 350 hp stock or nearly 450hp with a cam swap. Combined with a nitrous kit you can easily make over 500hp.
Is 120 compression good?
In general, a compression reading of 120 PSI or above is considered to be good for most gasoline engines. However, the acceptable range of compression values may vary depending on the make and model of the engine, as well as its age and condition.
Is the 4.8 and 5.3 the same engine?
The 5.3L was equipped with the same headers, water pump and throttle body as the 4.8L and first run in stock trim with the Holley EFI system. The larger 5.3L offered only slightly more peak power (344 hp vs. 333 hp), but offered significantly more torque, especially lower in the rev range.
What is the best turbo for a 4.8 LS?
One of the best options for 4.8 LS single turbo builds is the 7875 Billet Turbo . 96 A/R. LS 4.8 turbo applications can spool this turbo reasonably quickly and supports up to 800-wheel horsepower, provided you’ve got the basic supporting modifications in place, like a cam, springs, converter, and injectors.
Is the 4.8 Vortec a good engine?
The 4.8 is a good and reliable engine when properly maintained. One aspect that improves the reliability is the fact that it does not have the Active Fuel Management system that can disable 4 cylinders like the 5.3 engine does. Yes the 5.3 makes more power but it tends to have issues with the AFM system.
Is 120 compression bad?
In general, a compression reading of 120 PSI or above is considered to be good for most gasoline engines. However, the acceptable range of compression values may vary depending on the make and model of the engine, as well as its age and condition.
