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| Home > Help Needed / General Tech Chat > are these oil pressure figures ok | |||||||
 517 Posts Member #: 9931 Post Whore brighton |
17th Dec, 2012 at 10:18:25pm
ive tryed searching be can not find a definate answer
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517 Posts Member #: 9931 Post Whore brighton |
17th Dec, 2012 at 10:27:21pm
im running 10-40 oil
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 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
17th Dec, 2012 at 10:32:44pm
yes acceptable, maybe a shade of bearing wear nothing to worry about, use 20/50 oil and drop in there a tin 500ml of STP grorilla snot
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517 Posts Member #: 9931 Post Whore brighton |
17th Dec, 2012 at 10:41:50pm
ok thanks benross im due to be changing it at work this weekend any specific oil millers 20w50?
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9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
17th Dec, 2012 at 11:32:58pm
any 20/50 oil with an AIP spec wrote on the can
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 6753 Posts Member #: 828 Post Whore uranus |
18th Dec, 2012 at 10:20:21am
a slightly different experience for me , i have been using 10/40 for around 6 years in my turbo motor , i also get around 60 psi cold tickover ,35 psi hot .tickover ...max hot oil pressure 50 psi ,my engine aitnt dead yet .
Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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 9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
18th Dec, 2012 at 10:48:02am
i have had oil pressures much lower than that and it lasted long enough Yes i moved to the darkside |
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224 Posts Member #: 9987 Senior Member Amsterdam |
18th Dec, 2012 at 01:09:44pm
On 17th Dec, 2012 charlieb150 said:
ive tryed searching be can not find a definate answer @1500 cold i have 55-60psi , hot i have 25- 35psi maybe a bit more @3000 crusing i have after a long run 60miles at a constant 65 miles a hour 45psi ish thanks charlie As a rule of thumb, in order to be safe an engine needs 0.7 Bar / 10 psi of oil pressure per 1000RPM, i.e. 50 psi @ 5000rpm etc. The higher your oil's (warm) viscosity the higher the oil pressure. In sprint engines they tend to choose oil viscosity as close as possible to match the 10psi x 1000RPM as to not loose power through unecessary losses in driving the oil pump. In endurance engines you tend to add a normal running safety margin to allow for untypical high oil temps (oil cooler air feed blocked by debris) a thing called Oil Shear Stability and fuel dilution. Shear stability is a measure of the extent at which an oil is able to maintain its viscosity (as printed on the container) under stress. It's not uncommon for a W40 oil to measure W25 after 5000miles of use. Full synthetics (POA/Esters) offer much higher shear stability than mineral oils. Especially important on a mini since the oil is constantly minced to death by the transmission. Another important property of oil is its barrier lubricant additives. Especially on a mechanical valve train A-series push rod engine this becomes apparent. The most common barriers are zinc and phosphor also known as ZDDP package. Guess what, ZDDP reduces catalytic converter live....therefore is much reduced in high/modern API spec oils. Do a google search on ZDDP and cam bucket failure and you'll get the idea :( A good ZDDP package (>1200ppm) can be found in many racing oils, I favour Castrol TSW / Edge 10W60 as it has enough detergents to satisfy BMW M in its ability to attain reasonable oil change intervals. There are also some good motorcycle oils out there like Mobil 1 V-twin that have high enough ZDDP levels. Torco and Redline also fit our needs. I'm sure there will be others still. A final piece in the puzzle is fuel dilution. Especially on old school turbo engines running rich mixtures to aid cooling this can be an important factor to account for. So in short, the pressures you see are plenty safe.....just make sure you use sensible oil change intervals to account for viscosity loss and fuel dilution, and if you hate grinding cams / buckets into shrapnel make sure your oil has the right ZDDP level! Cheers, Evoderby |
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 6549 Posts Member #: 1149 #1 Basshunter Fan Force Racing ICT Dept Manager Miglia Turbo Am frum Yokshyer tha noes! |
18th Dec, 2012 at 03:18:47pm
Are you a salesman for an oil company?
On 18th Dec, 2012 Evoderby said:
On 17th Dec, 2012 charlieb150 said:
ive tryed searching be can not find a definate answer @1500 cold i have 55-60psi , hot i have 25- 35psi maybe a bit more @3000 crusing i have after a long run 60miles at a constant 65 miles a hour 45psi ish thanks charlie As a rule of thumb, in order to be safe an engine needs 0.7 Bar / 10 psi of oil pressure per 1000RPM, i.e. 50 psi @ 5000rpm etc. The higher your oil's (warm) viscosity the higher the oil pressure. In sprint engines they tend to choose oil viscosity as close as possible to match the 10psi x 1000RPM as to not loose power through unecessary losses in driving the oil pump. In endurance engines you tend to add a normal running safety margin to allow for untypical high oil temps (oil cooler air feed blocked by debris) a thing called Oil Shear Stability and fuel dilution. Shear stability is a measure of the extent at which an oil is able to maintain its viscosity (as printed on the container) under stress. It's not uncommon for a W40 oil to measure W25 after 5000miles of use. Full synthetics (POA/Esters) offer much higher shear stability than mineral oils. Especially important on a mini since the oil is constantly minced to death by the transmission. Another important property of oil is its barrier lubricant additives. Especially on a mechanical valve train A-series push rod engine this becomes apparent. The most common barriers are zinc and phosphor also known as ZDDP package. Guess what, ZDDP reduces catalytic converter live....therefore is much reduced in high/modern API spec oils. Do a google search on ZDDP and cam bucket failure and you'll get the idea :( A good ZDDP package (>1200ppm) can be found in many racing oils, I favour Castrol TSW / Edge 10W60 as it has enough detergents to satisfy BMW M in its ability to attain reasonable oil change intervals. There are also some good motorcycle oils out there like Mobil 1 V-twin that have high enough ZDDP levels. Torco and Redline also fit our needs. I'm sure there will be others still. A final piece in the puzzle is fuel dilution. Especially on old school turbo engines running rich mixtures to aid cooling this can be an important factor to account for. So in short, the pressures you see are plenty safe.....just make sure you use sensible oil change intervals to account for viscosity loss and fuel dilution, and if you hate grinding cams / buckets into shrapnel make sure your oil has the right ZDDP level! Cheers, Evoderby 1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.
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 10023 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
18th Dec, 2012 at 03:55:06pm
If he is he isn't a very good one cos he hasn't tried to sell you any If something is worth doing, it's worth doing half of. |
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517 Posts Member #: 9931 Post Whore brighton |
18th Dec, 2012 at 06:20:11pm
well i can get 10w40 castrol semi / fully synthetic oil for litrally nothing lol from work Edited by charlieb150 on 18th Dec, 2012. |
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224 Posts Member #: 9987 Senior Member Amsterdam |
18th Dec, 2012 at 06:34:10pm
<<Are you a salesman for an oil company?>>
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
18th Dec, 2012 at 06:52:14pm
LOL!!
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
18th Dec, 2012 at 06:59:05pm
thats a nice cut and paste Mike. ..lmao.
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
18th Dec, 2012 at 08:40:16pm
On 18th Dec, 2012 robert said:
a slightly different experience for me , i have been using 10/40 for around 6 years in my turbo motor , i also get around 60 psi cold tickover ,35 psi hot .tickover ...max hot oil pressure 50 psi ,my engine aitnt dead yet . oh ,and its a reasonaby high output one that gets thrashed to death on the drag track too. I'd like to add that it is not the engine that suffers from thin oil, it is the gearbox, but I know robert has taken steps in the choice of oils to overcome that. This has always been the biggest problem with the transverse A series engine. The gearbox needs a real thick gloopy oil, but the engine needs a really thin "snake oil" haha I would personally use a fully synthetic 10w40 shared gearbox wet clutch motorcycle oil. On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
18th Dec, 2012 at 08:44:06pm
On 18th Dec, 2012 MikeRace said: Probibly. There was a troll on many of the forums a couple of years back marketing for Opie Oils
Are you a salesman for an oil company? On 18th Dec, 2012 Evoderby said: On 17th Dec, 2012 charlieb150 said:
ive tryed searching be can not find a definate answer @1500 cold i have 55-60psi , hot i have 25- 35psi maybe a bit more @3000 crusing i have after a long run 60miles at a constant 65 miles a hour 45psi ish thanks charlie As a rule of thumb, in order to be safe an engine needs 0.7 Bar / 10 psi of oil pressure per 1000RPM, i.e. 50 psi @ 5000rpm etc. The higher your oil's (warm) viscosity the higher the oil pressure. In sprint engines they tend to choose oil viscosity as close as possible to match the 10psi x 1000RPM as to not loose power through unecessary losses in driving the oil pump. In endurance engines you tend to add a normal running safety margin to allow for untypical high oil temps (oil cooler air feed blocked by debris) a thing called Oil Shear Stability and fuel dilution. Shear stability is a measure of the extent at which an oil is able to maintain its viscosity (as printed on the container) under stress. It's not uncommon for a W40 oil to measure W25 after 5000miles of use. Full synthetics (POA/Esters) offer much higher shear stability than mineral oils. Especially important on a mini since the oil is constantly minced to death by the transmission. Another important property of oil is its barrier lubricant additives. Especially on a mechanical valve train A-series push rod engine this becomes apparent. The most common barriers are zinc and phosphor also known as ZDDP package. Guess what, ZDDP reduces catalytic converter live....therefore is much reduced in high/modern API spec oils. Do a google search on ZDDP and cam bucket failure and you'll get the idea :( A good ZDDP package (>1200ppm) can be found in many racing oils, I favour Castrol TSW / Edge 10W60 as it has enough detergents to satisfy BMW M in its ability to attain reasonable oil change intervals. There are also some good motorcycle oils out there like Mobil 1 V-twin that have high enough ZDDP levels. Torco and Redline also fit our needs. I'm sure there will be others still. A final piece in the puzzle is fuel dilution. Especially on old school turbo engines running rich mixtures to aid cooling this can be an important factor to account for. So in short, the pressures you see are plenty safe.....just make sure you use sensible oil change intervals to account for viscosity loss and fuel dilution, and if you hate grinding cams / buckets into shrapnel make sure your oil has the right ZDDP level! Cheers, Evoderby On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
18th Dec, 2012 at 08:49:16pm
On 18th Dec, 2012 charlieb150 said:
well i can get 10w40 castrol semi / fully synthetic oil for litrally nothing lol from work 
the important thing to take from all that jargon above is the ZZDP levels in the castrol oil you are using will likely not be up to the standard required by your 60 year old design engine, despite any of the fancy sales banter you find on the side of all oil cans these days. As a general rule If it has an API specification above F, its no good. That said, Millers and Penrite manufacture oils specifically for the Transverse A series engine that are not APi rated On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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3006 Posts Member #: 2500 Post Whore Buckinghamshire |
18th Dec, 2012 at 09:35:39pm
My inline A series seems to like 10/40 semi synthetic and gets a thorough thrashing most of the time. Oil pressure is 70psi cold.40psi hot at 3000rpm with 20psi at tickover, hot.
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 1767 Posts Member #: 9165 Previously josh4444 Australia, brisbane |
27th Dec, 2012 at 11:27:19am
i run this stuff its a bit noisy in the box tho.. its 10w40 full syn
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1909 Posts Member #: 9764 Post Whore Northamptonshire. |
27th Dec, 2012 at 06:39:50pm
You can run 15w 40 Diesel oil that works fine :] can't remember pressures but cleaned up the inside of the moggie engine good once every 3 servies it gose in for 3000 miles so not blown yet and has run on 10 40 aswell (both had molyslip) IMO worked fine |
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
27th Dec, 2012 at 07:06:16pm
I am still skeptical about using Diesel engine oils since mostly they use a high level of detergents. These oils and their addative packages are designed to run at lower cylinder temperatures of the diesel engine.
On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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1909 Posts Member #: 9764 Post Whore Northamptonshire. |
27th Dec, 2012 at 07:13:48pm
It dose help clean the crap out that some ouls leave behid its personal prefence aslong none these silly 0w 30's go in can't see an issue |
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