Ryan, let us know how you go with it.
Ryan, let us know how you go with it.
did a test and here is what the 0-100psi sensor output
voltage-----Air Compressor Gauge-----1.5" Liquid Gauge
--------------------------------------------------------
1.47v-----30psi-----24psi
1.91v-----40psi-----35psi
2.36v-----50psi-----46psi
3.57v-----80psi-----77psi
4.35v-----100psi-----97psi
4.48v-----???-------100psi
Not sure but I'm guessing the 1.5" liquid gauge was more accurate because it is 0-100psi vs the air comp gauge was 0-200. Also note the 1.5" gauge and sensor was at the end of a 50 foot air hose.
Looks like the formula may be psi = (voltage-.5v)/.04 . What do you guys think?
Last edited by ryans1000; August 23rd, 2011 at 05:55 PM.
9.8@150 . LQ4 Turbonetics Billet 7575@18psi, 6 speed, non-intercooled with meth. Speed Density, open loop, no PE.
yes, the liquid gauge looks more accurate..
In the FWIW dept:
I've tested many of the small gauges, [Summit, Jegs type], against the certified gauge on my injector flow bench... Most don't come close.
However, once the deviation is established, it will repeat at most all the test pressures...
I've also seen the liquid filled units be affected by under hood heat. [Were rail mounted].
Chuck L.
CODY Motorsports
Fuel Injector Service
Madison, GA.
706-342-3152
770-265-5144 [C]
Yes, that's what I get...Originally Posted by ryans1000
you can simplify it to: psi = (volts*25)-12.5
i'm going to feed the sensor in through the 3 egr pins 41, 47 and 55. When I enable egr in b1301 will that effect any other areas/tables?
9.8@150 . LQ4 Turbonetics Billet 7575@18psi, 6 speed, non-intercooled with meth. Speed Density, open loop, no PE.
Table B5907 EGR Spark Correction will contribute to final spark.
got it installed, seems to be working fine. so on the stock fuel rail with dual walbro pumps, I'm getting a fast fluctuation from 54.5 to 60psi . Base pressure is set to 58psi. Regulator is before the rails obviously as there is no return port on the rails. This image is with the car off and just the fuel pump turned on. Haven't had time to drive the car yet, maybe tomorrow. Is this normal????
click here
9.8@150 . LQ4 Turbonetics Billet 7575@18psi, 6 speed, non-intercooled with meth. Speed Density, open loop, no PE.
well my sensor started reading about 10psi too low all the sudden after only a few weeks use. contacted the seller and he sent me a new one. so i'm not sure if this sensor is cheap junk or just a freak defect. I'll keep you guys updated on the new one.
9.8@150 . LQ4 Turbonetics Billet 7575@18psi, 6 speed, non-intercooled with meth. Speed Density, open loop, no PE.
Thanks for the update.
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