FrontEngineDragsters.Org Forum
Drag Racing Discussions => Electronics => Topic started by: noslin on September 24, 2017, 09:36:18 PM
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where would you install fuel pressure sensor(s) on blown setup and general purpose on n/a setup. would it be beneficial to run more then one sensor, if so where would you put the additional sensors?
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I have mine on the output side of the K-valve. I want to know what pressure the nozzles and poppets are seeing.
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We drilled and tapped the plug on the distribution block at the back of the Enderle Hat for the same reason 32bantum did.
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We drilled and tapped the plug on the distribution block at the back of the Enderle Hat for the same reason 32bantum did.
i talked to guy this weekend and asked about FP sensor location. i asked about the distribution block. he said that his data log showed a lot of fluctuation here. i think they do as 32bantam does.
do you see any fluctuations on your logs if you have a logger? im guessing it might be pulses from cylinder fill. idk, just a guess. you would think there would be consistent pressure there but that distribution block is feeding 8 cyl so could be some pulsing maybe
ty
dean
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We drilled and tapped the plug on the distribution block at the back of the Enderle Hat for the same reason 32bantum did.
i talked to guy this weekend and asked about FP sensor location. i asked about the distribution block. he said that his data log showed a lot of fluctuation here. i think they do as 32bantam does.
do you see any fluctuations on your logs if you have a logger? im guessing it might be pulses from cylinder fill. idk, just a guess. you would think there would be consistent pressure there but that distribution block is feeding 8 cyl so could be some pulsing maybe
ty
dean
Mechanical constant flow fuel injection... I expect no pressure pulsing.
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I don't run a blower, but if it helps, my fuel pressure sensor is on my pump right after the fuel shut-off, between the shut off and the barrel valve.
If you are not sure, call your computer company, RacePak, RPM, or ?
Jon
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Dean,
Yes you will see pulsing, but that can be even out by inputting the correct frequency that the sensor is designed for. I don't know about other systems, but we use an early version of the Edelbrock QuikData (Serial #0014) which allows you to adjust the frequency.
While I am comfortable using this system, I would recommend an RPM Performance Data Logger because it is cost effective and the after sales service is outstanding.
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Dean,
Yes you will see pulsing, but that can be even out by inputting the correct frequency that the sensor is designed for. I don't know about other systems, but we use an early version of the Edelbrock QuikData (Serial #0014) which allows you to adjust the frequency.
While I am comfortable using this system, I would recommend an RPM Performance Data Logger because it is cost effective and the after sales service is outstanding.
Gino,
What would cause the fuel pressure pulses? Pump impeller?
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I can't imagine that because there is so much line after the pump to absorb the pulses.
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It could also be that the reading are recorded every 1/1000 per second. I really don't remember and we really could be splitting hairs here. I will have to look a the laptop later tonight and get a screen shot of a run.
Another way to verify fuel pressure is to have mechanical 0-200 psi gauge with a one way check valve.
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im using Motec dash logger. The person i was speaking too uses Race Pack setup.
on the Motec you can apply a filter and set the logging rate too from 1hz to 1000hz for each channel.
with the EFI, some car us a dampner on the fuel rail as the pulses from injectors will cause fluctuations. with EFI injector, its opening and closing creating the pulses. on MFI, even at the distribution, its a constant flow corrrect? so, it shouldnt see pulses assuming? if it is, where/how are they created. is the valve opening events enough to do this on a plenum setup? i could see on individual runner maybe?
ty
dean
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Mine is in the distribution block
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Mine is on bottom of Barrel Valve and I use the RPM data logger. Very pleased with it.