cobra2326

Finished installing my oil pressure gauge tonight. Ive been FI for about 3 weeks, but was waiting for a t-fitting to install my pressure gauge.

In reference to this thread:

https://honda-tech.com/zerothread?id=1399446

I remembered reading it and I noticed that my oil pressure now peaks at 65 psi. So I capped the oil feed line for the turbo, started it up, and the oil pressure would bounce right off of 85 psi, settling in at 80psi @ 3k rpms just like it used to. Reinstall the line, back to 65psi. It bounces off of 65psi and settles in @ 60psi, so I know the oil pump is seeing pressure.

My question is, should I install a restrictor or not even worry about it. Does the oil pump cut pressure at a certain psi or is it based on flow?

LSEGHATCH

In for the answere.

EnzoSpeed

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cobra2326 &raquo;</TD></TR><TR><TD CLASS="quote"> Does the oil pump cut pressure at a certain psi or is it based on flow?</TD></TR></TABLE>

Psi.

cobra2326

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EnzoSpeed &raquo;</TD></TR><TR><TD CLASS="quote">Psi.</TD></TR></TABLE>

Ok, so the only way my oil pressure gauge would be "bouncing" off of 65 psi like it used to bounce off 85 psi would be if the oil pump was actually seeing the original 85 psi, but the gauge wasnt b/c some of the oil pressure at the gauge is being bled off through the turbo? Im assuming its probably not necessary to get a restrictor then?

This may actually be a good thing, in that my turbo wont be seeing more than 60psi, which should help to lengthen its life span.

cobra2326

Can a few folks w/ turbo b-series VTEC motors and oil pressure gauges post their oil pressure when fully warm as well as their oil feed/gauge setups?

Mine is currently like so:

1ft -3an line off block to a T, one side goes to autometer oil pressure guage, the other to a 3ft -3an line to the turbo, no restrictor, and a -10an drain line.

When I plug the turbo oil feed line, oil pressure is normal: 80psi @ 3000rpms.

EnzoSpeed

Well you don't need a restrictor with -3 feed lines, I can tell you that much.

nonvtecD

I'm thinking most honda oil pumps pump out about the same pressure. My y7 pump does 95 psi when cold and around 15-20 when hot... I have a restrictor so my turbo doesn't see that, but 3AN lines are fine. Anybody who doesn't see this kind of pressure has oiling issues somewhere.

D@nnY

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cobra2326 &raquo;</TD></TR><TR><TD CLASS="quote">Finished installing my oil pressure gauge tonight. Ive been FI for about 3 weeks, but was waiting for a t-fitting to install my pressure gauge.

In reference to this thread:

https://honda-tech.com/zerothread?id=1399446

I remembered reading it and I noticed that my oil pressure now peaks at 65 psi. So I capped the oil feed line for the turbo, started it up, and the oil pressure would bounce right off of 85 psi, settling in at 80psi @ 3k rpms just like it used to. Reinstall the line, back to 65psi. It bounces off of 65psi and settles in @ 60psi, so I know the oil pump is seeing pressure.

My question is, should I install a restrictor or not even worry about it. Does the oil pump cut pressure at a certain psi or is it based on flow?</TD></TR></TABLE>

you drove you car with the oil line fromt he turbo disconencted? what did the turbo do to you?

EnzoSpeed

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D@nnY &raquo;</TD></TR><TR><TD CLASS="quote">

you drove you car with the oil line fromt he turbo disconencted? what did the turbo do to you? </TD></TR></TABLE>


I think he just idled it with the line disconnected, in which case the turbo wouldn't have spooled or needed oil.

cobra2326

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EnzoSpeed &raquo;</TD></TR><TR><TD CLASS="quote">I think he just idled it with the line disconnected, in which case the turbo wouldn't have spooled or needed oil.</TD></TR></TABLE>

Yeah, I just idled it, revved it a few times.

Its funny, b/c Ive seen a lot of people on here say "my oil pressure at WOT is...". Oil pressure is in no way indexed to throttle position. I can be WOT @ 2000 rpms, and oil pressure will be the same as decelerating @ 2000 rpms. Oil pressure is a function of RPMs and temperature...

mike1114

iTrader: (1)

my oil press gets up around the same 55-65psi after turbo install, 2 different setups.

I've always thought something was wrong till I read your explanation. Now I'm mad I never thought of it!!!

elpiar

My oil pressure above 3k rpms are about 50 psi. Is this too low?

mike1114

iTrader: (1)

Per helms for GSR:

Oil PSI @ idle is 10-15psi

Oil PSI @ 3000rpm is 50psi

So if your in those specs, your good.

cobra2326

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elpiar &raquo;</TD></TR><TR><TD CLASS="quote">My oil pressure above 3k rpms are about 50 psi. Is this too low?</TD></TR></TABLE>

^^ Right, like he said.

Also, if my above theory is correct, and your setup is similar to mine, your oil pressure in actuality is about 20psi higher than the gauge reads. You can check this by slowly revving your engine from idle and watching the oil pressure gauge, you should eventually see it "bounce" off a certain psi, then settle in at another. I think the threshold on a b-series motor is 85psi, with the settle in being at 80psi, so when it bounces, you know that the oil pump has relieved pressure, and is probably seeing 80psi.

99B16Si

mine is about 15-20psi lower after the turbo install. I have 1ft line coming of the back of the block going to a T, then one side of the T going to the turbo and the other to the gauge(all 3an). The highest pressure i've seen when the motor was fully warmed up was 65psi and it usually sits at about 15-18psi at idle