Guages is it True
09-28-2007, 10:49 AM
#22
2nd Gear Member
Join Date: Oct 2005
Location: On your six, 1.2nm... and I have tone!
Posts: 455
RE: Guages is it True
ORIGINAL: 06tyrfryr
you will not build excess oil pressure on cold start up to 90 or 100 psi because your oil pump has a pressure relief valve. if not it would blow the seems apart on your oil filter. that is why your guage doesnt appear to vary. they are pumping enough volume and pressure to keep it maxed out even when the engine is warm
you will not build excess oil pressure on cold start up to 90 or 100 psi because your oil pump has a pressure relief valve. if not it would blow the seems apart on your oil filter. that is why your guage doesnt appear to vary. they are pumping enough volume and pressure to keep it maxed out even when the engine is warm
The stock gauge in the Mustang does not move because it's just indicating pressure, not how much of it you have. Do you really believe you are making the same PSI in oil pressure at idle that you are at WOT? If so, you need to find another hobby, my friend.
09-28-2007, 12:39 PM
#23
4th Gear Member
Join Date: Feb 2007
Location: Illinois
Posts: 1,726
RE: Guages is it True
you will not build excess oil pressure on cold start up to 90 or 100 psi because your oil pump has a pressure relief valve. if not it would blow the seems apart on your oil filter. that is why your guage doesnt appear to vary. they are pumping enough volume and pressure to keep it maxed out even when the engine is warm
30 PSI - 80 PSI cold
20 PSI - 70 PSI hot
If the damn stock needle was anything but an idiot light - it would move.
09-28-2007, 03:31 PM
#24
2nd Gear Member
Join Date: Aug 2007
Location:
Posts: 245
RE: Guages is it True
ORIGINAL: 281GT
I have a proper aftermarket oil pressure gauge in mine and it does read higher when cold and at higher rpms. The stock oil gauge is driven by a simple on/off switch that closes the contacts in the presence of "some" oil pressure. I know this to be fact because I checked using an ohm meter on the stock sender to learn this.
I have a proper aftermarket oil pressure gauge in mine and it does read higher when cold and at higher rpms. The stock oil gauge is driven by a simple on/off switch that closes the contacts in the presence of "some" oil pressure. I know this to be fact because I checked using an ohm meter on the stock sender to learn this.
The stock sensor is 'set' to 5ish psi. If it is just a closure switch, then it's probably recieving/sending something like 5 volts or 12 volts (REALLY low amps of course
). If the stocker goes to the middle of the guage with 5+psi, when we really want 50ish to be the middle. calibrate 50 psi on real guage to the voltage the original sent out.Tom
09-29-2007, 09:38 AM
#25
Cut & Paste Expert
Join Date: May 2007
Location: NW Arkansas
Posts: 13,322
RE: Guages is it True
ORIGINAL: SlideWRX
Makes me wonder... If the on/off part of the system is in the oil pressure sensor, could one replace it with another unit? get the voltage calibrated and maybe the stock oil pressure guage would show a difference between 20 psi & 80 psi... The ecu may not bealtering/reading the signal, just passing it through.
The stock sensor is 'set' to 5ish psi. If it is just a closure switch, then it's probably recieving/sending something like 5 volts or 12 volts (REALLY low amps of course ). If the stocker goes to the middle of the guage with 5+psi, when we really want 50ish to be the middle. calibrate 50 psi on real guage to the voltage the original sent out.
Tom
ORIGINAL: 281GT
I have a proper aftermarket oil pressure gauge in mine and it does read higher when cold and at higher rpms. The stock oil gauge is driven by a simple on/off switch that closes the contacts in the presence of "some" oil pressure. I know this to be fact because I checked using an ohm meter on the stock sender to learn this.
I have a proper aftermarket oil pressure gauge in mine and it does read higher when cold and at higher rpms. The stock oil gauge is driven by a simple on/off switch that closes the contacts in the presence of "some" oil pressure. I know this to be fact because I checked using an ohm meter on the stock sender to learn this.
The stock sensor is 'set' to 5ish psi. If it is just a closure switch, then it's probably recieving/sending something like 5 volts or 12 volts (REALLY low amps of course
). If the stocker goes to the middle of the guage with 5+psi, when we really want 50ish to be the middle. calibrate 50 psi on real guage to the voltage the original sent out.Tom
addition of a new sender capable of varying the voltage verses pressure.
The stock sensor has one wire going to it and it grounds this at over
?5? PSI or something. Not sending or receiving any 5V or 12V at
any amps. No go on the replace the sender and get a working OEM
oil pressure guage reading. Kinda makes me glad I didnt go for the
upgraded insturment cluster with the 2 extra "guages" and the my
color. The good ol handy MSD DashHawk shows hundreds of
parameters and does 1/4 mile and 0-60 times to boot. And you
can read and reset error codes.
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