Racer723

iTrader: (1)

Kinda noobish but I want to make sure. The stock oil pressure sensor only has one wire, (that I can see). So all I have to do is hook up one of the spare A/D to it? Or is there more to it? Thanks

C. Ludwig

iTrader: (27)

More to it. The inputs to the Haltech want to see 0-5V signal. The stock single wire senders are just variable resistors that pull to ground. You will need a 0-5V sending unit. I've had good luck with the FJO units.

fritts

iTrader: (5)

You can also go to radioshack and make your own circuit. Its extremely easy. Look to use resistors that are in the middle of the or the most used resistance range of the sensor. I use 7805 regulator for the 12 to 5 volt conversion or use the 5 volt line from the Haltech. The link below shows how they get wired up. I'm using a 30 ohm resistor on my oil pressure sensor input.

http://members.rennlist.com/v1uhoh/auxboxdrawing2.JPG

Racer723

iTrader: (1)

So are you talking about this \/, cause i'm still kinda confused?

fritts

iTrader: (5)

You got it. Just make sure you use a resistor that is close to the median range of the sensor.

Racer723

iTrader: (1)

Ok, so its 30 ohm right? not 30k or anything?

fritts

iTrader: (5)

On the FD median value is about 30 ohms. I don't know on an FC. Its in the manual somewhere though.

Racer723

iTrader: (1)

I couldn't find it in the FSM, this is what it said

fritts

iTrader: (5)

I would apply pressure to the sensors or run the engine and measure the resistance on the sensor.

Racer723

iTrader: (1)

ok, thanks

Brandon Robinson

iTrader: (3)

Or spend $20 and get a three wire sending unit.

MasterPro® Ignition 2-8164 - Oil Pressure Switch | O'Reilly Auto Parts

fritts

iTrader: (5)

That's a pressure switch (on/off) at a specific pressure not a range sensor.

Brandon Robinson

iTrader: (3)

It is called a switch but if you call the parts store there are two types, one is for a guage and one for a light. I used a spare that came out of my 89 GMC S-15 4.3 v6 vin code Z, It is the correct part numberfor a 0v to 5V ranged output ... You may want to do better research before quoting people from now on.

Brandon Robinson

iTrader: (3)

I am using that sensor at my aeromotive fuel pressure regulator on the spare a/d input so I can plug in the fuel pressure maps that come with injector dynamics injectors. Each injector comes with a table containing voltage, dead time compensation, fuel pressure and actual compensated flow, they also handle a max duty cycle of 95%.

fritts

iTrader: (5)

The part you listed has a description of a switch. Settle down guy. Do you know the max pressure of the sensor? Or the output curve of the sensor? May be cheap alternative to other pressure transducers out there.

Brandon Robinson

iTrader: (3)

Well the awnser I got from standard motor products was 80 psi - 85 ohms, 40 psi - 55 ohms, 10 psi - 25 ohms, 0 psi - 5.5 ohms. Poles 1 and 3 are closed from 1.5 to 7.5 psi.

fritts

iTrader: (5)

Its a bit low for rotary use at 80 psi, if that's the max. Otherwise should be a nice cheap sensor to use in a piston engine build.

JDriftM

iTrader: (9)

I used to work for Oreilly for 3 years, the masterpro is crap, seriously its ****. Fritts knows his stuff, if he posted something its to help you not to mock you. Don't let your 58 post, newbie self get so worked up, there are some people on this forum who will help you and not flame you. Relax and appreciate.

Cheers.

Brandon Robinson

iTrader: (3)

Why dont you mind your own business and go sit in the corner and let the adults talk. If you where a real parts guy you know anyone could cross reference that number to a more expensive sensor. Depending on your budget you can buy master pro, standard motor products, a/c delco, bosch ect... Everybody makes that sensors.

What matters here is that there are three wire pressure transducers out there that do not require "radio shack" modifications to install. There is the peace of mind knowing that your sensor is sending out an accurate signal with no guess work and you dont have to break the bank to accomplish it.

Personally I am using a Standard Motor Products PS-236 sending unit for fuel pressure, though I understand where Fritts is coming from, it will not work if you have a FD or crushed pressure regulator. There a sensors that range from 100 to 0 psi but I will have to look up which car used them. A C4 Corvette may be a good starting place.

And PS. JDM Drifter I am trying to help, ya jackass.

JDriftM

iTrader: (9)

So sorry. Didn't know this wasn't a public forum. Thanks for setting me straight.

While I will apologize for my previous comment, I must compliment you for going above and beyond trying to out-do me. Seeing as I was merely stepping into make a statement and back up a very good friend of mine (Fritts), I think you took it a little further than what you should .

At any rate, again, my apologies for my comment. Good luck bud.

Brandon Robinson

iTrader: (3)

Its all good, apology accepted.

Brandon Robinson

iTrader: (3)

AEM Electronics 30-2131-150 - AEM Electronics PSIG Sensor Kits - Overview - SummitRacing.com

It is a bit more money but it would work Fritts, 150 psi AEM. Around 40 bucks for the sending unit and pigtail, not a bad deal.

jrx13

iTrader: (3)

I've used an AEM sensor for a fuel pressure sensor on my datalogger. It was a lot cheaper than a Racepak one. They have different pressure sensors and provide the calibration scale.

I am interested in that Masterpro one....that would be a nice cheap alternative.

hIGGI

iTrader: (7)

PS-236 is 3 wire? Got specs?

thanks!

Brandon Robinson

iTrader: (3)

Just called smp and i was wrong about the PS-236 they had no pressure to ohm tables.