LaBonte Motorsports failsafe controller
LaBonte Motorsports failsafe (with video of killing pump while WOT)
www.labontemotorsports.com <http://www.labontemotorsports.com/>
500ml/min to 100ml/min variable set point for min flow volume failsafe and a logable output.
Below is a clip of two consecutive WOT pulls in 2nd. The first is normal operation, the second I killed power to the pump through a temporary switch rigged in the car. The quality stinks but I had to hold the camera in one hand, run and monitor the logger with the other, and drive.
I turned the boost down to about 26 -27 psi to be on the safe side since running WOT without WM spray on a car tuned for a 675 nozzle is pushing it. But it's been checked before many times and a big knock gauge was in view. In safemode the boost will spike to little over 20psi and drop to 15psi, this spike does not worry me due to the small volume of air and low load at the time. The AFR hit 14.2 at WOT and knock did not occur throughout log, even with the rise in timing from hitting lower load cells. Perhaps I should block the timing out here for additional protection since those cells only get hit between shifts.
Log images from the video below in post #28
500ml/min to 100ml/min variable set point for min flow volume failsafe and a logable output.
Below is a clip of two consecutive WOT pulls in 2nd. The first is normal operation, the second I killed power to the pump through a temporary switch rigged in the car. The quality stinks but I had to hold the camera in one hand, run and monitor the logger with the other, and drive.
I turned the boost down to about 26 -27 psi to be on the safe side since running WOT without WM spray on a car tuned for a 675 nozzle is pushing it. But it's been checked before many times and a big knock gauge was in view. In safemode the boost will spike to little over 20psi and drop to 15psi, this spike does not worry me due to the small volume of air and low load at the time. The AFR hit 14.2 at WOT and knock did not occur throughout log, even with the rise in timing from hitting lower load cells. Perhaps I should block the timing out here for additional protection since those cells only get hit between shifts.
Log images from the video below in post #28
Last edited by C6C6CH3vo; Oct 9, 2007 at 01:19 PM.
When you think about the volume of 400ml/min compared to a 675ml/min nozzle (rated at 100 psi) on a epdm pump turned up to it's 180psi setting, then the the numbers make a little more sence. In fact the WGA sol is probable starting to recieve vdc which can be seen from a failsafe light flicker, it's just that 400ml is reached fast (28 psi in 0.6 seconds and 1600hz by 5100RPM). I suppose I could set it to 300ml to keep it from triggering in part boost - it's just I never drive at part boost unless I'm stuck behind a V8 sportscar trying to drop me.
Hope this helps explain why I set it that high with a progressive, Ishould of been more careful as to not confuse anyone
400ml/min seems to be the highest minimal amount I can run without sending it into failsafe. That way it doesnt have to drop much before safing - kind of like riding the outer boundry.
When you think about the volume of 400ml/min compared to a 675ml/min nozzle (rated at 100 psi) on a epdm pump turned up to it's 180psi setting, then the the numbers make a little more sence. In fact the WGA sol is probable starting to recieve vdc which can be seen from a failsafe light flicker, it's just that 400ml is reached fast (28 psi in 0.6 seconds and 1600hz by 5100RPM). I suppose I could set it to 300ml to keep it from triggering in part boost - it's just I never drive at part boost unless I'm stuck behind a V8 sportscar trying to drop me.
Hope this helps explain why I set it that high with a progressive, Ishould of been more careful as to not confuse anyone
When you think about the volume of 400ml/min compared to a 675ml/min nozzle (rated at 100 psi) on a epdm pump turned up to it's 180psi setting, then the the numbers make a little more sence. In fact the WGA sol is probable starting to recieve vdc which can be seen from a failsafe light flicker, it's just that 400ml is reached fast (28 psi in 0.6 seconds and 1600hz by 5100RPM). I suppose I could set it to 300ml to keep it from triggering in part boost - it's just I never drive at part boost unless I'm stuck behind a V8 sportscar trying to drop me.
Hope this helps explain why I set it that high with a progressive, Ishould of been more careful as to not confuse anyone
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0.5V = 500ml/min.....
4.5v is missing some where...
maybe its 1V-100ml/min.....5V-500ml/min?
dejavu
not sure if still the same but nevertheless we may get the engineer on here soon enough:
but it may be like 2v = flow without nozzle (1/4" tubing) and < 2v = < flow down to 0.09 volts
But the answer to your question is YES, there is an output to log flow volume. This and the other info (video, logs) will be posted when I have at least an afternoon of spare time.
not sure if still the same but nevertheless we may get the engineer on here soon enough:
but it may be like 2v = flow without nozzle (1/4" tubing) and < 2v = < flow down to 0.09 volts
But the answer to your question is YES, there is an output to log flow volume. This and the other info (video, logs) will be posted when I have at least an afternoon of spare time.
Last edited by C6C6CH3vo; Sep 12, 2007 at 10:06 AM.
