S65 Oil Pump - Changes needed time run extra clearance bearings?

Scharbag · 05-28-2020, 08:03 PM

Came across this today. I am unconvinced. Any experts able to comment on this?

https://srd-eng.com/bmw-products/

Cheers,

SYT_Shadow · 05-28-2020, 08:12 PM

How odd. We have lots of oil pressure data from the S65 that BE ran for a year... i don't recall oil pressure dropping at high rpms.
If i remember correctly, after 2k rpm the pump provided more oil than the engine could use

Redd · 05-28-2020, 08:14 PM

$400 for those two small gears. They better be made from titanium and anodized with the blood of unicorns.

deansbimmer · 05-28-2020, 08:47 PM

I've not seen this before. Interesting. Looks like it's basically an overdrive gear set for the pumps. Overdriving the pumps would cause additional load on the crank, oil pump chains, and drives. Takes HP to run those pumps at 8000rpm. I'm not sold on it, even if you're running thinner oils. Might get a set to test.

Redd · 05-28-2020, 10:44 PM

Isn't the S65 oil pump variable pressure? If you run more volume/pressure, won't the oil pump just reduce to compensate?

Scharbag · 05-29-2020, 01:41 AM

Quote:

Originally Posted by Redd

Isn't the S65 oil pump variable pressure? If you run more volume/pressure, won't the oil pump just reduce to compensate?

Exactly. Based on the data provided by AutoTalent, it seems like the S65 is more than capable of producing acceptable flow while maintaining pressure.

Hopefully deansbimmer will try a set and share the result.

Helmsman · 05-29-2020, 07:19 AM

Always something to worry about. Now when we have increased oil clearance in place, the oil pressure will die on us after 5k rpm. Ah well, back to nanny driving...

This is not at all what BE (Autotalen) suggest. Also, whats up with SRD's suggested 60PSI max pressure while BE read 70PSI+?. Quite significant difference, or do I misunderstand something here? Would be really interesting to listen into a discussions between experts here.

https://www.m3post.com/forums/showthread.php?t=1337998

rhyary · 05-29-2020, 08:06 AM

subscribed

tdott · 05-29-2020, 09:41 AM

http://wiki.rcollins.org/core/index...._Flow_Analysis

Scharbag · 05-29-2020, 10:47 AM

Quote:

Originally Posted by tdott

http://wiki.rcollins.org/core/index...._Flow_Analysis

Exactly.

Scharbag · 08-18-2020, 04:53 PM

Just bumping this in case there is any new information.

Cheers,

//steve\\ · 08-18-2020, 05:10 PM

Quote:

Originally Posted by tdott

http://wiki.rcollins.org/core/index...._Flow_Analysis

Holy Data!!!

tdott · 08-19-2020, 09:03 AM

Quote:

Originally Posted by //steve\\

Holy Data!!!

A whole lot more than 8 points of data and a cheesy graph trying to sell a product.

former 240 s14 · 11-06-2025, 01:09 PM

Quote:

Originally Posted by tdott

http://wiki.rcollins.org/core/index...._Flow_Analysis

Know this thread is as old as time but...........

Any access to this still? I can't find it online.

Rubin

Redd · 11-06-2025, 08:34 PM

Probably for the better that they can't be found anymore lol

IamFODI · 11-07-2025, 10:02 AM

Quote:

Originally Posted by Redd

Probably for the better that they can't be found anymore lol

Was thinking along the same lines but wasn't sure what happened and didn't want to jump the gun.

I'm curious. Not enough to go out of my way, but enough to read if someone were to post...

Helmsman · 11-07-2025, 10:43 AM

Quote:

Originally Posted by IamFODI

Was thinking along the same lines but wasn't sure what happened and didn't want to jump the gun.

I'm curious. Not enough to go out of my way, but enough to read if someone were to post...

Hmm, didn't realize they took the page down, wonder why.

Believe this is similar data posted on the board: https://www.m3post.com/forums/showthread.php?t=1337998

tdott · 11-07-2025, 11:46 AM

Quote:

Originally Posted by Helmsman

Hmm, didn't realize they took the page down, wonder why.

Believe this is similar data posted on the board: https://www.m3post.com/forums/showthread.php?t=1337998

the whole wiki is down, I think the server was moved or something, probably didn't bother to get it back up yet.
https://srd-eng.com/ website is also down, maybe they went out of business since they haven't sold any of these?

Perhaps RE bought the rights to the product which is why they are pushing it on IG now.

The info is in the thread above tho.

I saw someone on IG, now claiming this is a big issue. IMO it's marketing BS with not enough data to prove any of their claims.

former 240 s14 · 11-10-2025, 03:30 PM

https://www.rogueengineering.com/SRD...et_p_2518.html

This is SRD's engineering brief, I just thought there was something else out there.

I already ordered these and will be part of my rebuild.

05-28-2020, 08:03 PM	#1
Scharbag Colonel 2769 Rep 2,185 Posts Drives: 2011 E92 M3 Join Date: Oct 2017 Location: Victoria iTrader: (0) Garage List 2011 BMW E92 M3 [0.00]	S65 Oil Pump - Changes needed time run extra clearance bearings? Came across this today. I am unconvinced. Any experts able to comment on this? https://srd-eng.com/bmw-products/ Cheers, __________________ 2011 E92 M3 - 6MT, ZCP, ZF LSD, ESS G1, Some other goodies...
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05-28-2020, 08:12 PM	#2
SYT_Shadow ///M Powered for Life 12486 Rep 10,915 Posts Drives: E90M/E92M/M4GTS/M4GT4/M6/X5M Join Date: Sep 2010 Location: Greenwich, CT iTrader: (2)	How odd. We have lots of oil pressure data from the S65 that BE ran for a year... i don't recall oil pressure dropping at high rpms. If i remember correctly, after 2k rpm the pump provided more oil than the engine could use __________________ DIY: S65 Rod Bearings E9X PFC Z54 BBK on F8X BK harness bar + seats: fit 6 tires in an M3 do88 Cooling Goodies GTS Twins: GTMore project
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05-28-2020, 08:14 PM	#3
Redd Brigadier General 4821 Rep 4,751 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	$400 for those two small gears. They better be made from titanium and anodized with the blood of unicorns.
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05-28-2020, 08:47 PM	#4
deansbimmer BimmerPost Supporting Vendor 4287 Rep 3,021 Posts Drives: 2011 E93 M3 Join Date: Nov 2014 Location: DFW, Texas iTrader: (17) Garage List 1988 E30 M3 [0.00] 2006 E46 M3 [0.00] 2024 X7 M60i [0.00] 2011 BMW M3 [0.00]	I've not seen this before. Interesting. Looks like it's basically an overdrive gear set for the pumps. Overdriving the pumps would cause additional load on the crank, oil pump chains, and drives. Takes HP to run those pumps at 8000rpm. I'm not sold on it, even if you're running thinner oils. Might get a set to test.
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05-28-2020, 10:44 PM	#5
Redd Brigadier General 4821 Rep 4,751 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	Isn't the S65 oil pump variable pressure? If you run more volume/pressure, won't the oil pump just reduce to compensate?
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05-29-2020, 07:19 AM	#7
Helmsman Major General 5191 Rep 7,550 Posts Drives: 2011 AW E90 M3 ZCP Join Date: Mar 2014 Location: Stockholm, Sweden iTrader: (0)	Always something to worry about. Now when we have increased oil clearance in place, the oil pressure will die on us after 5k rpm. Ah well, back to nanny driving... This is not at all what BE (Autotalen) suggest. Also, whats up with SRD's suggested 60PSI max pressure while BE read 70PSI+?. Quite significant difference, or do I misunderstand something here? Would be really interesting to listen into a discussions between experts here. https://www.m3post.com/forums/showthread.php?t=1337998 Last edited by Helmsman; 05-29-2020 at 07:43 AM..
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05-29-2020, 08:06 AM	#8
rhyary Banned 1628 Rep 2,883 Posts Drives: 2013 M3 Join Date: May 2015 Location: Albany, NY iTrader: (0)	subscribed
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05-29-2020, 09:41 AM	#9
tdott S.FL S65 Specialist 4426 Rep 4,275 Posts Drives: M3 Join Date: Nov 2010 Location: South FL / 6ix iTrader: (4)	http://wiki.rcollins.org/core/index...._Flow_Analysis __________________ N/A S65 Headers Before/After Dyno Results tdott's Spec E9X Build Thread https://www.youtube.com/@tdottme
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08-18-2020, 04:53 PM	#11
Scharbag Colonel 2769 Rep 2,185 Posts Drives: 2011 E92 M3 Join Date: Oct 2017 Location: Victoria iTrader: (0) Garage List 2011 BMW E92 M3 [0.00]	Just bumping this in case there is any new information. Cheers, __________________ 2011 E92 M3 - 6MT, ZCP, ZF LSD, ESS G1, Some other goodies...
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11-06-2025, 08:34 PM	#15
Redd Brigadier General 4821 Rep 4,751 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	Probably for the better that they can't be found anymore lol
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11-10-2025, 03:30 PM	#19
former 240 s14 First Lieutenant 325 Rep 369 Posts Drives: 2011 Comp E92 & 2008 E92 S65 Join Date: Jan 2007 Location: Cincinnati Ohio iTrader: (0)	https://www.rogueengineering.com/SRD...et_p_2518.html This is SRD's engineering brief, I just thought there was something else out there. I already ordered these and will be part of my rebuild.
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