Lacking Power
I purchased a 1998 Gulf Stream Sun Voyager today. It has a 5.9 liter Cummins Diesel with Allison 4 speed transmission. The test drive the owner took me on was about 20 miles, since I didn't drive I...
Forum Discussion
Hi jjrowan - what does the motorhome weigh?
Our 5.9 powered pickup is rated at 300 hp / 660 torques and hauls truck/5th wheel combined weight of 22,999lbs at 45mph at part throttle up 8% grades.
A quick look at the Google suggests your engine may be rated in the 210 hp range at the moment. There should be a placard attached high on engine opposite to the exhaust side that states to original power rating and serial number.
First I would replace the fuel filters and check the air filter to makes sure fuel and air is not wanting.
The 5.9 can be modified to produce 600+ hp and 1300 torques reliably if you have the cooling system & transmission to handle it. Travelling over hill and dale at a mile a minute like a passenger car with a heavy vehicle only takes $$$'s nowadays.
If you choose to make modifications for power an idea might be to sit down and make a plan with a shop with a proven track record in towing / hauling / marine engine mods - conditions where engines operate reliably at full power for extended periods - that will give you reliable results for your money.
There will be lots of power options between what you have and the limit of the engine's capability.
Our 5.9 powered pickup is rated at 300 hp / 660 torques and hauls truck/5th wheel combined weight of 22,999lbs at 45mph at part throttle up 8% grades.
A quick look at the Google suggests your engine may be rated in the 210 hp range at the moment. There should be a placard attached high on engine opposite to the exhaust side that states to original power rating and serial number.
First I would replace the fuel filters and check the air filter to makes sure fuel and air is not wanting.
The 5.9 can be modified to produce 600+ hp and 1300 torques reliably if you have the cooling system & transmission to handle it. Travelling over hill and dale at a mile a minute like a passenger car with a heavy vehicle only takes $$$'s nowadays.
If you choose to make modifications for power an idea might be to sit down and make a plan with a shop with a proven track record in towing / hauling / marine engine mods - conditions where engines operate reliably at full power for extended periods - that will give you reliable results for your money.
There will be lots of power options between what you have and the limit of the engine's capability.
