Alky pressure

pacecarta said:
theres some XFI screen shots here of alky logs
http://turbobuick.com/forums/thread...8th-mile-11-23-14.410937/page-15#post-3521401
. i run a 200psi sensor but generally im in the 135 range
Click to expand...

What 200 psi sensor do you use? Where did you get it? I have four 3-AN nipples on my little custom alky manifold. Two of them feed the dual nozzles, one has a gauge on it for under hood testing, the last one is capped for future use. This last one I would like to use for a pressure sensor. I guess I could use a AN/NPT adapter for the sensor. Take a look up close below on my firewall. Do you think this would work?
 
Last edited:
pacecarta said:
im running a sensor off ebay from a local guy , (renbusen) 1/8 npt .5-4.5v out, 200psi ,5v input was like 25 bucks , meth doesnt like them but they are cheap
they will also work on powerlogger
heres one
http://www.ebay.com/itm/Pressure-tr...r_Truck_Parts_Accessories&hash=item3a8930a973

http://www.ebay.com/itm/Pressure-tr...Parts_Accessories&hash=item27e8f8e6a3&vxp=mtr

and a 150psi
http://www.ebay.com/itm/Pressure-tr...r_Truck_Parts_Accessories&hash=item3f46627ba4
Click to expand...

Thanks Paul. I'll buy spares. When they go bad do they leak or do they just stop working/read incorrectly?
 
OK, I have logging set up. Pressure 5 is Alky 38lbs at 20lbs of boost? Is that normal?
 

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check the sensor setting at 20# boost should be over 100psi
heres my86gn on a weak pump dual nozzle, gain at 5 boost at ..boost 25

alky 86gn.jpg
 
Changed the setting to the only other pressure setting and now it reads 70lbs or 2 volts on a 0-5volt 300psig sensor.
I would think that 2.5 volts should = 150psi
Not sure how to adjust from there. I see the offsets but do think I need anything there.
 
i grabbed the wrong file , that was murphsters low 9 pass new pump dialed back a little
this is screen shot of my 86 9.7's with an older pump , not leaking but weaker, since replaced
gain 5 twin m10 nozzles, volt booster

86gn screen shot 9.7 137.jpg
 
MDavis said:
Changed the setting to the only other pressure setting and now it reads 70lbs or 2 volts on a 0-5volt 300psig sensor.
I would think that 2.5 volts should = 150psi
Not sure how to adjust from there. I see the offsets but do think I need anything there.
Click to expand...
Sensors work .5-4.5
Meaning you have a 4 volt swing on a 5v sensor.
So if you get 75 psi per volt, and see 2volts.. 1 volt is 75, 1/2 volt is 37= 110 psi pressure at 20 psi boost.. whats the issue?
 
Razor said:
Sensors work .5-4.5
Meaning you have a 4 volt swing on a 5v sensor.
So if you get 75 psi per volt, and see 2volts.. 1 volt is 75, 1/2 volt is 37= 110 psi pressure at 20 psi boost.. whats the issue?
Click to expand...

Found a leak on the outlet side of the pump by inspecting immediately after driving.
Just talked to you about a new pump.
 
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