When did Cummins go from 12 valve to 24 valve?
1998
By 1998, emissions regulations necessitated the switch from the 6BT “12-valve Cummins” to the ISB “24-valve Cummins”. Although the 24-valve was more powerful than the 6BT and was, by all means, still a very good engine, it never achieved quite the same popularity as the original 12-valve.
How long will a Cummins 24 valve last?
Dodge states that the Cummins is good for 350,000 miles before major overhaul. Chevy and Ford say 250,000 miles for their diesels.
Is it bad to straight pipe a 5.9 Cummins?
The turbo gives you all the back pressure you need. It is no problem to run a straight pipe.
How much horsepower can you get out of a stock 24 valve Cummins?
Most will support around 1200 hp while only having a minimal pressure drop between the inlet and outlet.
How reliable is a 24 valve Cummins?
Cummins 5.9 24v Reliability Outside of the fuel system, the 5.9 24v is a very reliable engine. The engine internals such as the pistons, rod, and crankshaft will last a lifetime and can hold up beyond 500,000 miles.
Is the 5.9 24 valve Cummins a good engine?
Outside of the fuel system, the 5.9 24v is a very reliable engine. The engine internals such as the pistons, rod, and crankshaft will last a lifetime and can hold up beyond 500,000 miles. Outside of the fuel system components, you should expect to replace common items like water pumps, hoses, belts, etc.
Does straight pipe damage Turbo?
No it will not hurt the turbo! It would seem that with less back pressure it would have less pressure on it.
Does straight piping a diesel affect performance?
The primary advantage of equipping a straight pipe exhaust to a performance engine is that you’ll see a definite boost in your horsepower. This result occurs because the system reduces the amount of backpressure from the engine, allowing the exhaust gases to form with greater freedom.
Is the Cummins 24 valve a good engine?