powermandan
Well-known member
Hello everyone.
Ive built a AFN engine with a 11mm ALH pump and .260 Injection nozzels.
So I've been having problems tuning it.
What I have found that is the pump voltage map is very odd below 2000rpm. From all of the factory maps I have looked at. The voltage applied to the actuator looks roughly linear after 1000rpm all the way to 5000rpm for a given IQ. However it does not seem to be the case with my pump. Which makes we worry about the following
the pump itself has a bit of story to it. I bought it off eBay and had it sent directly to a diesel specialist for testing and service.
Unfortunately I was told that the bit on top of the pump where the cable goes was faulty and the actuator wouldn't move and was pulling far to much current. The replacement part from bosch new was about £900. Because I was already about £100 in debt to the specialist. I opted to purchase the a 10mm ALH pump and swap the faulty bit. Which the specialist did for me. So I did not see the parts side by side.
The parts had a different part number, which conserns me. But from what I read these pumps seems to be mix and match in some ways.
Does anyone think this may be an issue?
Ive built a AFN engine with a 11mm ALH pump and .260 Injection nozzels.
So I've been having problems tuning it.
What I have found that is the pump voltage map is very odd below 2000rpm. From all of the factory maps I have looked at. The voltage applied to the actuator looks roughly linear after 1000rpm all the way to 5000rpm for a given IQ. However it does not seem to be the case with my pump. Which makes we worry about the following
the pump itself has a bit of story to it. I bought it off eBay and had it sent directly to a diesel specialist for testing and service.
Unfortunately I was told that the bit on top of the pump where the cable goes was faulty and the actuator wouldn't move and was pulling far to much current. The replacement part from bosch new was about £900. Because I was already about £100 in debt to the specialist. I opted to purchase the a 10mm ALH pump and swap the faulty bit. Which the specialist did for me. So I did not see the parts side by side.
The parts had a different part number, which conserns me. But from what I read these pumps seems to be mix and match in some ways.
Does anyone think this may be an issue?