17-12-2012, 03:20 PM
No idea.
Like Darren said it's just a case of making stuff fit however you want really.
I wouldn't let EDC15C2 put you off though Darren, there is a lot to learn, but if you finally go for after-market CR injection a lot of the learning will cross-over I think.
In theory running two pumps is easy from an ECU POV, and assuming you can run the same PWM signal to the relief valves then it should just be a matter of recalibrating that control map to suit twice the flow. I think it's a PID controller so in theory it'll work, but it might just over/undershoot or oscillate if the map isn't 'about right'
As you said, it's just a shaft spinning in a pump, so adding a 2nd pump with it's own relief valve isn't anything too complicated. I guess the only possibly issue is any asymmetric mechanical differences between pumps/relief valves, so I'd go for new/re-con units to assure they both run as similarly as possible.
You'd certainly need BIG injectors to make the most of that though!
I think the problem will always be that as soon as you go away from something another road car has used with similar remapped flow rates/pressures to what you want, that also has the right pattern, then you are well and truly into the land of DIY calibration from the ground up.
That is even possible if you use some initiative. Run a HP system (possibly on a 1.9Td to run the pump
), run the ECU etc on a bench, feed in signals using pots etc to give the sensors the appropriate signals.
Then simply fill up a known volume at a known rpm and energisation times of injectors, divvy it out and get the IQ... fill up your table.
Biggest issue actually, thinking about it, is recalibrating all your tables out. Hmmm...
Dave
Like Darren said it's just a case of making stuff fit however you want really.
I wouldn't let EDC15C2 put you off though Darren, there is a lot to learn, but if you finally go for after-market CR injection a lot of the learning will cross-over I think.
In theory running two pumps is easy from an ECU POV, and assuming you can run the same PWM signal to the relief valves then it should just be a matter of recalibrating that control map to suit twice the flow. I think it's a PID controller so in theory it'll work, but it might just over/undershoot or oscillate if the map isn't 'about right'
As you said, it's just a shaft spinning in a pump, so adding a 2nd pump with it's own relief valve isn't anything too complicated. I guess the only possibly issue is any asymmetric mechanical differences between pumps/relief valves, so I'd go for new/re-con units to assure they both run as similarly as possible.
You'd certainly need BIG injectors to make the most of that though!
I think the problem will always be that as soon as you go away from something another road car has used with similar remapped flow rates/pressures to what you want, that also has the right pattern, then you are well and truly into the land of DIY calibration from the ground up.
That is even possible if you use some initiative. Run a HP system (possibly on a 1.9Td to run the pump
), run the ECU etc on a bench, feed in signals using pots etc to give the sensors the appropriate signals.Then simply fill up a known volume at a known rpm and energisation times of injectors, divvy it out and get the IQ... fill up your table.
Biggest issue actually, thinking about it, is recalibrating all your tables out. Hmmm...
Dave