Oil psi questions

[Toyota h8r]

Just curious about my 86.5`s oil psi. After installing a aftermarket gauge because stock one crap`d out, when the car warms up, the op is 6 to 10psi at idle. Then at 2500rpm its 50 to 60psi. Is my motor ok? I heard from ex owner thats all right for a supee. Whats your n/a run? Thanx, Shelby

[dcrusupra]

That is fine. It's completely normal for an N/A.

[RedEleven87]

Here's a link to the online handbook don't know if it helps...

http://www.brandwood.net/supra/handbook/1/5/gauges.html#Oil

The whole handbook link was just posted up on the MK3 Reference section.

[Superjustin13]

that oil pressure is good.... aslong as its not below 5 1/2 at idle your good. and like 40lbs at 3k

[Toyota h8r]

Thanx for info! Im new to the mighty 7mge, so im not used to seeing 6psi of oil. My first vehicle was a rusted out s10 that had a rod knock and still ran 20psi of oil!

[Supracentral]

Thanx for info! Im new to the mighty 7mge, so im not used to seeing 6psi of oil. My first vehicle was a rusted out s10 that had a rod knock and still ran 20psi of oil!

Most mechanics who are familiar with (for example) GM motors will tell you she's gonna blow when you've got 5 psi of oil pressure at idle.

Believe it or not 4.3 psi (0.3 kg/cm2) or higher is the factory spec for this motor at idle.

It's normal.

[lifesnotfair]

Mine never really goes below 9-10 at idle. Guess tha's good. GOod to know it could be even lower and I shouldn't worry.

[lagged]

you know, i always wonder why toyota didnt put a mark on the OP guage for the lowest acceptable oil pressure reading...

[Toyotaxtreamteam]

yea i am at like 41/2 to 5 at idle and about 30 to 40 at the highest it goes running

[Draken]

yeah i worried about this also when i first got my MKIII up and running, thats one of the things that brought me here, i browsed quite a bit before i joined...found out thats normal, so i don't worry about it anymore, just keep an eye on my oil level

[1TuffSupra]

Since the topic is about oil pumps are there any differences between the NA and turbo pumps. I want to replace the pump on my JDM motor while its on the stand for a little extra insurance. For some reason I feel like I read somewhere on here that the turbo pump supplies more pressure while crusing than the NA one. But when my car was running id get like 8psi at idle and only 30 cruising, it would never reach 40 or 60psi no matter what i did. Of course I ended up with rod knock even with the right amt of oil.

[PorterzSupra]

I had to order a new pump for my NA-T they are suppose to be the same for turbo and N/A personally im not sure because I know the turbo has extra oil squirters and a turbo to run but they claim they are the same. You can shim it like I did to get more pressure but be carefull not to overshim it or your screwed, u gotta take everything back apart. I ended up doin mine about 4.8 mm (5 washers) I have around 65-70 cold and 45+55 warm crusin speed. However my idle pressue still sucks 10 PSI or less but I guess thats how they roll. I dunno maybe that has somethin to do with rod knock, it happens to much there must be a connection somewhere with our oil system

[1TuffSupra]

Well Fuzz240 and CanadianBacon answered my question in my thread about my turbo project.
Fuzz240 said
"Also the oil pumps are different, the turbo one has bigger gears to flow more.You also have the added flexiblity to shim you pump, over the wimpy flow of the n/a pump."

and canadianbacon said
"Actually, the NA oil pump is smaller in circumfence. The turbo one looks like the Star Trek Enterprise, and has a much larger head on it. Also the stock oil pan is a little bit deeper on the turbo models. I found this out when I built my first NA motor. Good luck with the project. Lots of work=lots of fun."

[lagged]

hmmm i just so happen to have a stock ge oil pan and oil pump and a stock gte oil pan and oil pump and aside from the gear there is no difference.

[1TuffSupra]

hmmm i just so happen to have a stock ge oil pan and oil pump and a stock gte oil pan and oil pump and aside from the gear there is no difference.

Ah, well i didnt think there was any difference in the GE and GTE oil pans, but I did think the two oil pumps differed. So I guess for the record we can say, the GTE oil pump is a nice upgrade to perform when the NA motor is out the car.

[Fuzz420]

hmmm i just so happen to have a stock ge oil pan and oil pump and a stock gte oil pan and oil pump and aside from the gear there is no difference.


there are some decrepencies, somebelieve that the newer n/a pumps are actually turbo pumps. If anyone would like to compare part numbers i still have my recipt from toyota from last year when i bought my new pump.

[1TuffSupra]

there are some decrepencies, somebelieve that the newer n/a pumps are actually turbo pumps. If anyone would like to compare part numbers i still have my recipt from toyota from last year when i bought my new pump.

That would be very interesting, I havent bought my GTE pump yet, but did you buy a GE pump last year or was a GTE pump? We could probably just go to jays toyota or whoever the toyota dealership is on this site and find the part #'s as well

[Fuzz420]

That would be very interesting, I havent bought my GTE pump yet, but did you buy a GE pump last year or was a GTE pump? We could probably just go to jays toyota or whoever the toyota dealership is on this site and find the part #'s as well


I bought the ge pump last year

[supramacist]

You cat's swing, man !