| Author | Message | ||
     Bill Coburn Grand Master Username: bill_coburn Post Number: 340 Registered: 4-2003 |
What pressure are we aiming for with these engines say about '70? | ||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 580 Registered: 4-2003 |
Bill, Mininum 16 psi idle hot (1.1bar) and 30 PSI (pref. 40) above 1500RPM (2.5Bar). RT | ||
| John Dare Grand Master Username: jgdare Post Number: 187 Registered: 12-2004 |
Hello Bill. I assume you meant year/era when you referred to '70. Remember that the oil pressure relief valve is set at 40 psi. At normal correct speed limits, with engine hot ("Penrite HPR30") I record an indicated 38 psi which I am pleased to see given the 130K+ miles recorded. I may eventually instal an audible signal "buzzer" and/ or cut-out for shut down in the event of oil pump gear failure or similar. I think these are useful forms of protection as it can be difficult to be ALWAYS scanning your instrumentation whilst proceeding. | ||
| Bill Coburn Grand Master Username: bill_coburn Post Number: 341 Registered: 4-2003 |
Thanks Richard. Having asked I then found the figure in the books. The last task on THE CAR has been the oil gauge which stopped working a little time after I installed a new $250 sender! I noticed that at over 60 mph the needle would rouse itself but little more. So out came the new sender and the gauge and it is now in Sydney. Apparently the gauge will be rebuilt and I thought it would be nice to have the needle in the middle of the white bit when the pressure is at 40 psi. Otherwise the car is going very well. No vibration or graunch change poits are good and brakes excellent. Now to seal up the haemorrhages in the Cloud III. - BBC | ||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 581 Registered: 4-2003 |
Bill, Sorry about the typo. Mininum 16 psi idle hot (1.1bar) and 36 PSI = 2.5 Bar (pref. 40 = 2.8 Bar) above 1500RPM. Maximum 42 psi under any engine condition. RT | ||
| Patrick Lockyer. Grand Master Username: pat_lockyer Post Number: 318 Registered: 9-2004 |
Running synthetic oil with a clean sump etc is the way forward. Oil pressure holds up better in all temps. Any sign of carbon deposits then not a good idea unless engine has a flush. The engine must also be in good order and not breathing heavy! | ||
| Miguel A. Garcia Experienced User Username: magarcia Post Number: 50 Registered: 3-2005 |
Sorry for my ignorance... but graphically, what would point the needle of the oil gauge for right values? Would it be in the white range of it when the car is running? | ||
| David Gore Moderator Username: david_gore Post Number: 474 Registered: 4-2003 |
Hi Miguel, Unfortunately almost all gauges in cars regardless of make are only an "INDICATOR" rather than a true measurement of actual conditions - this is due to calibration and actual system voltage varying between vehicles. To be absolutely certain of what your gauges are showing; you need to use a properly calibrated master gauge/sender unit to measure what your car is doing then install the vehicle gauge/sender and see what the reading is. From this, any abnormal indication can be determined as being high or low and appropriate action taken. | ||
| Phil Black Unregistered guest Posted From: 210.50.201.130 |
My car has got a oil pressure guage but I have seen lots of Shadows with no guage so was there a problem with them reading right from the beginning. I am using 20/60 type Penrite oil and pressure is good because people tell me that synthetic types leak more and use more too (Message approved by david_gore) | ||
| Gus Brogden Experienced User Username: gus Post Number: 28 Registered: 2-2008 |
My shadow 1 SRX2838 has one noisy lifter only at idle speed. The oil pressure gauge shows pretty low pressure at idle, normal at anything above idle speed. I am going to hook a gauge up to it to see how low it really is at idle speed. I run 20 50 oil in it. Either way, I would probably like to boost the pressure a bit at idle, and am preparing for the worst. SRX2838 has 225,000 miles, and besides this, it runs good. On my 1st oil change the filter canister was full of black gunk. After the fresh oil went in the lifter got a bit louder. I just got it before winter and am slowly resserecting it. I put on 50 miles and changed oil again. I was thinking of pulling the pan to see how the pickup looks. Are these oil pumps prone to wear? Are the pumps rebuildable or should they be replaced? What pressure is acceptable at idle? | ||
| Gus Brogden Experienced User Username: gus Post Number: 29 Registered: 2-2008 |
Sorry everyone, I erred. My last post should be in the Shadow department..... It just shows how much I enjoy reading the forum, and I dont even have a Cloud. Yet. But a Cloud III would grace my drive so nicely, a compliment to the 2 Shadows. I have convinced the wife that she loves me enough to allow me to get one. Perhaps the moderater can move my last post to the appropriate shadow thread? | ||
| Paul Yorke Prolific User Username: paul_yorke Post Number: 300 Registered: 6-2006 |
Gus, it's the same principal as the cloud. It would be worth taking the sump off and cleaning it out. The sumps do fill with goo and start to block the strainer. No safe way of cleaning it except removal I'm afraid. (I always check the inside of the dump with my finger when changing oil.) Yes the pump is re-buildable. Also pump drive gears can wear. | ||
| David Gore Moderator Username: david_gore Post Number: 879 Registered: 4-2003 |
Gus, I have moved your post to the Shadow section. The specified oil pressures for the V8 are low by modern car standards - the oil pump output pressure should be in the range 15-42psi [100-300kpa]. The set-up of the oil pump is described in Section E10 [page E47] of TSD2476 Shadow workshop manual which can be downloaded free from the Technical Library: http://rrtechnical.info/sy/tsd2476/tsd2476.htm |
