J_Supra_07 Posted February 5, 2011 Share Posted February 5, 2011 Hey all I just fitted a defi oil presure guage and I just want to ask what is a normal/ safe presure? Mine read 7.5/8 bar :-s is this normal? Quote Link to comment Share on other sites More sharing options...
bobapple Posted February 5, 2011 Share Posted February 5, 2011 Mines in PSI normally sits around 28 when all warmed up sits at about 80 when cold, you really don't want to see it drop under 17 but god knows what it is in bar, I think 1.2 bar is about 16 psi i think don't quote me though. Quote Link to comment Share on other sites More sharing options...
SupraDan24 Posted February 5, 2011 Share Posted February 5, 2011 Thats around 108-116psi in real money. Quote Link to comment Share on other sites More sharing options...
bobapple Posted February 5, 2011 Share Posted February 5, 2011 That seems high but I am on stock tubbies don't know if that makes a difference that was at cold wasn't it ? Quote Link to comment Share on other sites More sharing options...
J_Supra_07 Posted February 5, 2011 Author Share Posted February 5, 2011 Humm I'll have a look a what Its in may not be bar then. It sit around 70 / 80 and on the gauge it says x 1000 Quote Link to comment Share on other sites More sharing options...
J_Supra_07 Posted February 5, 2011 Author Share Posted February 5, 2011 Right just had a look. It sits at 7.0000pa 8.0000pa anyone know what pa is and where it should sit? Quote Link to comment Share on other sites More sharing options...
bobapple Posted February 5, 2011 Share Posted February 5, 2011 I reckon it will be PSI mate as that what mine sits around on a cold start up and mine is definitely PSI as it says PSI on it . Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted February 5, 2011 Share Posted February 5, 2011 (edited) The oil pressure will vary a little depending on oil grade, but i have also found the the Supra oil pump seems to vary quite a bit in the pressure output between different cars and pumps, when i first got my Supra i used to see 28psi hot idle, up to 120 could start, but also used to see over 100psi at high RPM( hot) Then after replacing my pump which was worn, with a genuine Toyota item, i then got 25psi hot idle and only 80psi high RPM (hot) go figure. Edited February 5, 2011 by Tricky-Ricky (see edit history) Quote Link to comment Share on other sites More sharing options...
bobapple Posted February 5, 2011 Share Posted February 5, 2011 Hey Ricky mine is also a new pump and thats roughly what I get as you say it can vary on a few factors oil type age of pump idle speeds etc. You just don't want to see it drop below 17 18 psi or it'll be game over. Quote Link to comment Share on other sites More sharing options...
needy Posted February 5, 2011 Share Posted February 5, 2011 your oil pressure is after the book. have worked with many supras 2jz engines, and on cold engine i read 8 bar (116 psi) and on hot engine 2 bar (28-29 psi) and the pressure have i read when the engine is idling. so no worryes Quote Link to comment Share on other sites More sharing options...
bobapple Posted February 5, 2011 Share Posted February 5, 2011 1 Pa (Pascal) = 0.000145037738 Psi Quote Link to comment Share on other sites More sharing options...
J_Supra_07 Posted February 5, 2011 Author Share Posted February 5, 2011 Thanks very much guys. So for safety if it drops below 1.2 somthing is up. Can to high presure do any damage? Quote Link to comment Share on other sites More sharing options...
trinitom Posted February 5, 2011 Share Posted February 5, 2011 too much pressure it's not good, that can lead to blow the crank seals. Quote Link to comment Share on other sites More sharing options...
J_Supra_07 Posted February 5, 2011 Author Share Posted February 5, 2011 So 1.2 is to low and over 8 at high rev is to high is that good to go by? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted February 5, 2011 Share Posted February 5, 2011 too much pressure it's not good, that can lead to blow the crank seals. No its not the pressure from the pump that causes the seal failure, its the amount of wear in the pump, allowing leakage to the seal void, what i was trying to illustrate in my post was that my worn pump was still making 120PSI hot, despite this. Quote Link to comment Share on other sites More sharing options...
trinitom Posted February 6, 2011 Share Posted February 6, 2011 No its not the pressure from the pump that causes the seal failure, its the amount of wear in the pump, allowing leakage to the seal void, what i was trying to illustrate in my post was that my worn pump was still making 120PSI hot, despite this. . Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted April 25, 2011 Share Posted April 25, 2011 I've bought a TT6 BPU and it's got a Blitz oil pressure and oil temp gauge's fitted. Had a bit of a blast on the way home and it looks like the pressure peaked at 10 bar (it reads in pascals though, so thats a conversion). Temp was about 110 Celsius peak. Looking at the rest of this thread, pressure looks a bit high? Do these figures sound ok? Can't remember what they were under normal driving, but to be fair there wasn't much of that after it had warmed up! I'll make a note of them tomorrow. Quote Link to comment Share on other sites More sharing options...
scotty71 Posted April 25, 2011 Share Posted April 25, 2011 means you have bought an ole dog budz Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted April 25, 2011 Share Posted April 25, 2011 Cheers Scott, that's cleared that up then! Seriously though... Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 25, 2011 Share Posted April 25, 2011 No its not the pressure from the pump that causes the seal failure, its the amount of wear in the pump, allowing leakage to the seal void, . Also, poorly fitted seals can leak as well Quote Link to comment Share on other sites More sharing options...
Lude Posted April 26, 2011 Share Posted April 26, 2011 mine is 6 KG/CM2 when cold, then settles to 2 KG/CM2 when idling at 1000rpm when you rev it then increases obv. Quote Link to comment Share on other sites More sharing options...
imi Posted May 7, 2011 Share Posted May 7, 2011 mine is 6 KG/CM2 when cold, then settles to 2 KG/CM2 when idling at 1000rpm when you rev it then increases obv. http://www.himni-racing.com/images/52mm%20oil%20press%20white.jpg does it ever fall below 2, say when you dump the clutch to stop at a set of lights. Quote Link to comment Share on other sites More sharing options...
Lude Posted May 8, 2011 Share Posted May 8, 2011 does it ever fall below 2, say when you dump the clutch to stop at a set of lights. umm... it does fall under 2 yes, but only as my car idles a bit crap under 1000rpm, the lower the revs the lower the oil pressure. at 1000rpm mine is at 2 kgcm2, 800rpm it will be something like 1.8 kgcm2 for example Quote Link to comment Share on other sites More sharing options...
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