Hi I am new and I am happy to find someone that can help me.I have a cummins 4bta marine engines with 110hp at 2200 rpm.I wish to upgrade my hp.What is your opinion so I will upgrade mp hp.My turbo is a holset hx30w
5.8 MB Views: 62
The unlimited cooling potential is one reason the marine engines came in higher tunes from the factory, I was just trying to point out that cooling was my only limiting factor for pushing it hard.One of the main issues with running higher RPM level is increased wear on the engine. The Cummins generally likes to operate in the under 2000 RPM area because that where the most torque is. A 3200 RPM governor spring is one commonly used on road engine mods. The standard governor was 2500 RPM. Wouldn't want to operate at that speed all day long but the engine could probably handle it but the fuel mileage would be like you flushed a toilet. I'd definitely want the HD valve spring on that just to be safe. Another item that is common on Marine 4bt is a crankshaft dampener. The extra mass it adds helps with the vibration inherent to the 4bt. They can be vibrating little monsters. Steve, engine cooling should never be an issue if you're using water the boat is running in. That water will never be air temp so that's probably less than 80 deg F. Main issue I'd think would be sure the water intake didn't get clogged by debris. Not sure what marine engine use to keep junk out of the water passages. One thing that you haven't mention is instruments to monitor the engine. On a turbo diesel, you want an EGT gauge and a boost gauge as minimum. Another item to check on you engine is the lift pump. Yours is a piston type high pressure lift pump. Very dependable. One area to check is the fuel inlet area. There is a screen in that port to catch larger debris and if it becomes clogged you lose a lot of power. Does you engine have a single or dual fuel filter? At least one should have a water separator so you can be sure to keep the water out of the injection system. Another possible mod would be a bypass oil filter system which helps keep the oil extra clean. Not a necessity, but can extend oil changes dramatically.