Oil pressure not going past 50psi on WOT?!?
11-22-2008, 06:34 AM
#1
Oil pressure not going past 50psi on WOT?!? I have about 10k on my new motor (fully built) and ive noticed lately that when going WOT my stock gauge doesnt go back 50. and my auto meter gauge i have hooked up to my a pillar doesnt go past 40psi. ive noticed that my autometer gauge is roughly 10 psi less than what the stock gauge reads.. so which one is more accurate..
Also does an oil pressure sending unit have ANYTHING at all to do with oil pressure?
Thanks and i need input.
Also does an oil pressure sending unit have ANYTHING at all to do with oil pressure?
Thanks and i need input.
11-22-2008, 06:59 AM
#2
The mechanical gauge is more accurate than the electronic
I have about 10k on my new motor (fully built) and ive noticed lately that when going WOT my stock gauge doesnt go back 50. and my auto meter gauge i have hooked up to my a pillar doesnt go past 40psi. ive noticed that my autometer gauge is roughly 10 psi less than what the stock gauge reads.. so which one is more accurate..
Also does an oil pressure sending unit have ANYTHING at all to do with oil pressure?
Thanks and i need input.
Also does an oil pressure sending unit have ANYTHING at all to do with oil pressure?
Thanks and i need input.
11-22-2008, 08:08 AM
#4
the motor is tight and its built from thunder racing the thing is it use to be high i forgot to say at cold start up its fine and high as hell. im using 10w 30 mobil 1 and i just recnetly started using that.
and my autometer gauge is tapped in above the oil filter.
someone suggested i use 15w50? i have always used mobil one and im POSITIVE the o ring is NOT pinched.
thanks guys.
and my autometer gauge is tapped in above the oil filter.
someone suggested i use 15w50? i have always used mobil one and im POSITIVE the o ring is NOT pinched.
thanks guys.
11-22-2008, 10:01 AM
#5
the motor is tight and its built from thunder racing the thing is it use to be high i forgot to say at cold start up its fine and high as hell. im using 10w 30 mobil 1 and i just recnetly started using that.
and my autometer gauge is tapped in above the oil filter.
someone suggested i use 15w50? i have always used mobil one and im POSITIVE the o ring is NOT pinched.
thanks guys.
and my autometer gauge is tapped in above the oil filter.
someone suggested i use 15w50? i have always used mobil one and im POSITIVE the o ring is NOT pinched.
thanks guys.
If it used to be high, then something has changed. Could be a lot of things; crank plug leak, lifter, oil galley seal, oil pump related issues, ...etc..
Do you have a PCV system? Have you recently or do you have a pre-oil installed?
Is one of the gauges a mechanical gauge? I read the comment stating that a mechanical gauge is more accurate, I just don't know which one it could be. Please confirm.
10W-30 is no good for an LS1 spec. motor, let alone 15W-50 (unless you're on a road course). You should be using a high quality 0W-40 like Pennzoil Platinum, Amsoil, or German Castrol. However, if the engine builder built the engine w/ more clearance than a spec LS1, then a 10W-40 is good. We need to know to what spec's. the motor was assembled to.
11-22-2008, 10:03 AM
#6
the motor is built for n20 im not sure wat specs. but it shouldnt of dropped like that.
I have a stock PCV system is this something to look at? i dont knw wat u mean by pre oiled and im sure its not a crank plug leak, or a lifter or a oil galley seal.
u guys have YET to mention it being a Oil pressure sending unit? will this affect the oil pressure in any way shape or form? should i go ahead and change it out?
I have a stock PCV system is this something to look at? i dont knw wat u mean by pre oiled and im sure its not a crank plug leak, or a lifter or a oil galley seal.
u guys have YET to mention it being a Oil pressure sending unit? will this affect the oil pressure in any way shape or form? should i go ahead and change it out?
11-22-2008, 10:14 AM
#7
the motor is built for n20 im not sure wat specs. but it shouldnt of dropped like that.
I have a stock PCV system is this something to look at? i dont knw wat u mean by pre oiled and im sure its not a crank plug leak, or a lifter or a oil galley seal.
u guys have YET to mention it being a Oil pressure sending unit? will this affect the oil pressure in any way shape or form? should i go ahead and change it out?
I have a stock PCV system is this something to look at? i dont knw wat u mean by pre oiled and im sure its not a crank plug leak, or a lifter or a oil galley seal.
u guys have YET to mention it being a Oil pressure sending unit? will this affect the oil pressure in any way shape or form? should i go ahead and change it out?
Agreed, it should not have dropped, just trying to figure out how serious the issue is.
Could be PCV related, don 't know yet.
Yes, it could be a sending unit. It appears to me that both of your gauges are electronic (no mechanical gauge). I have had trouble w/ Auto meter gauges in the past & won't use them. Have both gauges changed from where they were? It's unlikely that both senders would have changed @ the same time.
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11-22-2008, 10:38 AM
#8
its a mechanical guage i belive (the autometer) and it reads around 10 psi less than the stock gauge in the dash.
so where should i start? replace the oil pressure sending unit? change oil?
so where should i start? replace the oil pressure sending unit? change oil?
11-22-2008, 11:16 AM
#9
The oil pressure sending unit has nothing to do with oil pressure. The only thing it does is read pressure. The mechanical gauge is probably right, the electronic autometer guages I don't like. If you recently changed from convensional oil to the same weight synthetic oil then that is your issue because the synthetic oil is thinner than convensional oil and wont hold as much pressure. This is just my experience. Either way you have enough pressure to not mess anything up. What does your pressure look like at idle?
11-22-2008, 12:12 PM
#12
Any gauge that uses a sender is an electrical gauge. A mechanical gauge plugs directly into the oil galley & oil is sent to the gauge.
You said that the oil pressure has dropped from where it was for 10k miles. For this reason, stating that a certain pressure is enough does not explain the reason for the pressure drop. Yes, the displayed drop can be due to the sending unit.
What was the pressure on each gauge before the pressure drop?
11-22-2008, 02:41 PM
#15
Oh, it was the LATELY comment that led me to believe that your pressure had previously been higher than 50 psi @ WOT. Anyway, since we are simply discussing that the pressure has never gone past 50 psi, then it's fine. Throw the Autometer gauge out, I've gone several rounds w/ Autometer over their oil pressure gauges & they will never yield to the fact that their gauge/sender scaling is crap.
