now i see why we need FP gauges
#21
06-02-2007, 08:44 PM
Diesel Enthusiast
#22
06-02-2007, 10:53 PM
#24
06-03-2007, 07:07 AM
KO ENGINEERING’S RASP PUMP SYSTEM.
It is simple, there are no parts to wear out and the pump is easy to install.
Mounting brackets for the pump: This is a 2-part system that bolts on to your engine oil pan. It is CNC machined from 6061 aluminium, it is sweet. The drive hub bolts directly on to your harmonic balancer, you don’t have to worry about alignments on the pump because it is already engineered in the two part mounting system. You also do not have to worry about angles. Don’t have to worry about alignment or centering of the drive hub on the harmonic balancer as that is also engineered into the design of the actual drive hub. Just un do the four bolts on your harmonic balancer, bolt on your drive hub and you are ready for the pulleys & belt. At this point you are now ready for the plumbing.
Plumbing: The plumbing can be a little bit of a challenge for the average consumer and I told KO that. Having said that they decided with the many variables / preferences involved with plumbing and the different systems already on various trucks it was not practical to supply a plumbing kit with the pump. They would leave that to the individual installer to customize.
What is the warranty on this system? Fair question.
There really are not any wearable parts on this system other than the belt. There is a 5-year warranty on the system other than the belt. KO suggests you change it every 50,000 miles or carry a spare. When you get your pump kit, it comes with one spare belt.
What happens if a belt breaks? : Actually nothing really happens other than an LED light comes on in the cab of the truck telling you the belt broke. At that point the rasp system automatically switches you back to your electric fuel system via a pressure switch. That is another part of the system that is really sweet. The RASP system runs parallel to whatever electric fuel system you are already running.
What does a parallel fuel system mean?
For those of you unfamiliar with this terminology, what happens is that you actually have 2 fuel systems in your truck? The original electric fuel system you are already running, and the KO RASP system. They run side by side. & linked to each other via a Hobbs pressure switch.
Why is the Hobbs switch significant: Because anytime the pressure drops below 8 PSI the electric fuel pump automatically kicks in.
What kind of pressures does the RASP system run? I have spoken to a lot of people that have been advising KO ENGINEERING on what the pressures should be. The answer from Bosch & Cummins is 14 PSI. You do not want to exceed this for the best life on your VP 44 pump. (a lot of you already know that on the Dodge Rams if you try to run 20 –25 PSI at an idle with the electric fuel pumps, starting the vehicle becomes tough as you would have already hydraulic the VP 44 pump. In turn shortening the life of the VP 44 pump.
Pressure setting on the RASP system: 12-14 PSI. While you can turn it up.
If I turn the pressure up on KO’S RASP fuel pump system against KO Engineering’s advise will it effect the warranty on the pump system? no it will not. (for testing purposes we did turn the pump up to 55 PSI, the only thing we succeeded in doing was destroy the VP 44 pump.)
Electric fuel pumps run higher pressures at an idle to maintain pressures at wide-open throttle. Most of you guys running fuel pressure gauges already know this, as soon as you start stomping on your accelerator you watch the fuel gauge and start panicking if the pressures start to drop.
The R.A.S.P fuel system is the exact opposite. The higher the engine RPMS the more pump volume is available. No more having to worry about getting on the go pedal.
How is the pressure controlled on the R.A.S.P system?
It uses a bypass valve, which is controlled by a spring. Anything above 14 PSI simply gets returned back to the tank.
There are no wearable parts in the bypass system unlike a fuel regulator . It simply uses a spring and a valve.
How does this system affect changing your fuel filter: Changing your fuel filter is childs play, as the KO RASP fuel pump is not involved when you change the fuel filter, your electric fuel pump does all the work, same as always. Whatever procedures you previously used to change your fuel filter prior to installation of the RASP system remains the same. One of the hardest things with the mechanical fuel pump was changing your fuel filter. However with the RASP system running parallel with your electric fuel pump system KO made changing the fuel filter a breeze.
The system is ultra quiet, you don’t hear it compared to the electric fuel pump, which is annoying. The pump itself has straight cut gears so no pump crescents to wear out, no impellers to wear out. No thrust in the system so the body is not going to wear out VS the thrust in the electric fuel pumps causing pump bodies and impellers to wear out. The gears are stainless steel so even if water was run through it, it doesn’t matter.
Some of the test trucks and people we used in the R&D facility you may recognize, as they are known to be punishers on their equipment. Guys like Opie, Idaho CTD, Strick 9.
Is this the best system available for your dodges today? Absolutely without a doubt yes it is. No matter how some may try to slice it and dice it, bottom line is , electric fuel pumps are designed to be gravity fed and they always have thrust, bushings to wear out and the mechanical fuel pump uses the Cummins motor. As long as that motor is cranking over that fuel system is going to deliver.
It is simple, there are no parts to wear out and the pump is easy to install.
Mounting brackets for the pump: This is a 2-part system that bolts on to your engine oil pan. It is CNC machined from 6061 aluminium, it is sweet. The drive hub bolts directly on to your harmonic balancer, you don’t have to worry about alignments on the pump because it is already engineered in the two part mounting system. You also do not have to worry about angles. Don’t have to worry about alignment or centering of the drive hub on the harmonic balancer as that is also engineered into the design of the actual drive hub. Just un do the four bolts on your harmonic balancer, bolt on your drive hub and you are ready for the pulleys & belt. At this point you are now ready for the plumbing.
Plumbing: The plumbing can be a little bit of a challenge for the average consumer and I told KO that. Having said that they decided with the many variables / preferences involved with plumbing and the different systems already on various trucks it was not practical to supply a plumbing kit with the pump. They would leave that to the individual installer to customize.
What is the warranty on this system? Fair question.
There really are not any wearable parts on this system other than the belt. There is a 5-year warranty on the system other than the belt. KO suggests you change it every 50,000 miles or carry a spare. When you get your pump kit, it comes with one spare belt.
What happens if a belt breaks? : Actually nothing really happens other than an LED light comes on in the cab of the truck telling you the belt broke. At that point the rasp system automatically switches you back to your electric fuel system via a pressure switch. That is another part of the system that is really sweet. The RASP system runs parallel to whatever electric fuel system you are already running.
What does a parallel fuel system mean?
For those of you unfamiliar with this terminology, what happens is that you actually have 2 fuel systems in your truck? The original electric fuel system you are already running, and the KO RASP system. They run side by side. & linked to each other via a Hobbs pressure switch.
Why is the Hobbs switch significant: Because anytime the pressure drops below 8 PSI the electric fuel pump automatically kicks in.
What kind of pressures does the RASP system run? I have spoken to a lot of people that have been advising KO ENGINEERING on what the pressures should be. The answer from Bosch & Cummins is 14 PSI. You do not want to exceed this for the best life on your VP 44 pump. (a lot of you already know that on the Dodge Rams if you try to run 20 –25 PSI at an idle with the electric fuel pumps, starting the vehicle becomes tough as you would have already hydraulic the VP 44 pump. In turn shortening the life of the VP 44 pump.
Pressure setting on the RASP system: 12-14 PSI. While you can turn it up.
If I turn the pressure up on KO’S RASP fuel pump system against KO Engineering’s advise will it effect the warranty on the pump system? no it will not. (for testing purposes we did turn the pump up to 55 PSI, the only thing we succeeded in doing was destroy the VP 44 pump.)
Electric fuel pumps run higher pressures at an idle to maintain pressures at wide-open throttle. Most of you guys running fuel pressure gauges already know this, as soon as you start stomping on your accelerator you watch the fuel gauge and start panicking if the pressures start to drop.
The R.A.S.P fuel system is the exact opposite. The higher the engine RPMS the more pump volume is available. No more having to worry about getting on the go pedal.
How is the pressure controlled on the R.A.S.P system?
It uses a bypass valve, which is controlled by a spring. Anything above 14 PSI simply gets returned back to the tank.
There are no wearable parts in the bypass system unlike a fuel regulator . It simply uses a spring and a valve.
How does this system affect changing your fuel filter: Changing your fuel filter is childs play, as the KO RASP fuel pump is not involved when you change the fuel filter, your electric fuel pump does all the work, same as always. Whatever procedures you previously used to change your fuel filter prior to installation of the RASP system remains the same. One of the hardest things with the mechanical fuel pump was changing your fuel filter. However with the RASP system running parallel with your electric fuel pump system KO made changing the fuel filter a breeze.
The system is ultra quiet, you don’t hear it compared to the electric fuel pump, which is annoying. The pump itself has straight cut gears so no pump crescents to wear out, no impellers to wear out. No thrust in the system so the body is not going to wear out VS the thrust in the electric fuel pumps causing pump bodies and impellers to wear out. The gears are stainless steel so even if water was run through it, it doesn’t matter.
Some of the test trucks and people we used in the R&D facility you may recognize, as they are known to be punishers on their equipment. Guys like Opie, Idaho CTD, Strick 9.
Is this the best system available for your dodges today? Absolutely without a doubt yes it is. No matter how some may try to slice it and dice it, bottom line is , electric fuel pumps are designed to be gravity fed and they always have thrust, bushings to wear out and the mechanical fuel pump uses the Cummins motor. As long as that motor is cranking over that fuel system is going to deliver.
#25
06-03-2007, 07:31 AM
After all of this I see where the RASP has been copied and improved upon by a new product called the MITUSA. I'm still havin problems finding a vendor though. They make these for Cummins and Duramax. This new version is also supposed to be more competitive in price with the Air Dog and FASS also. So now just to find it.
#27
06-03-2007, 09:46 AM
#29
06-03-2007, 01:48 PM
#30
06-03-2007, 01:58 PM
