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Main : Misc : Tech Section A series high volume oil pump

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A series high volume oil pump
A series high volume oil pumpPopular
Submitter1200coupeMore Photos from 1200coupe   Last Update2005/5/2 1:31    Tell a friendTell a friend
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A series pump ans Z series pump

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Poster Thread
rgjt405
Posted: 2016/1/3 1:29  Updated: 2016/1/3 1:29
Quite a regular
Joined: 2012/10/2
From: Kelowna, BC, Canada
Posts: 56
 Re: A series high volume oil pump
Anybody have one of these for sale?
I made one, but it will not pump even after priming. The pump clearances between the rotors and the rotors to the pump housing are all within spec. I have no idea why it will not pump.

Poster Thread
ddgonzal
Posted: 2016/1/3 5:02  Updated: 2016/1/3 5:04
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Joined: 2001/5/3
From: 48 North
Posts: 31656
 Re: A series high volume oil pump
I suggest: place an advert in the Classifieds forum.

These pumps are self-priming. However, the Nismo hi-pressure/hi-volume fuel pump was not -- it used gears instead of the trochoid rotor type here, and the gear-type pump needed to be primed.

For more details on this hybrid pump, see High Capacity Oil Pump

Poster Thread
1200coupe
Posted: 2005/5/2 1:40  Updated: 2005/5/2 1:40
Home away from home
Joined: 2003/9/17
From: Canberra
Posts: 512
 Re: A series high volume oil pump
I did some playing in the shed on the weekend and came up with this.
Pic shows a standard A series oil pump (bottom) and a Nissan 240 Z oil pump (top).
To make your A series oil pump into a high volume pump you can use the Z pump guts and make a high volume oil pump for your A series.
A 13mm spacer needs to be manufactured and a new pump shaft is required. I estimate that up to 40% more volume can be achieved with this arrangement.
I will post the details of the bits that need to be made soon.
When I have more time I plan on doing this conversion and shall document it as I go along. Things I still have to work out are : if the releif spring needs to be backed up with a washer because of over pressure etc. Can someone post and tell me the normal oil pressure figure for an A series so I can measure my oil pressure before I manufacture and fit the new pump. I will measure oil pressure before and after and post the results.

Poster Thread
1200coupe
Posted: 2005/5/2 1:48  Updated: 2005/5/2 1:48
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Joined: 2003/9/17
From: Canberra
Posts: 512
 Re: A series high volume oil pump
I have just put another pic up showing the new designs for the parts that need to be manufactured.
Could somone link the two pic for me because I'm old and dont know how to do it

Thanks.

Poster Thread
2332owner
Posted: 2005/5/2 2:21  Updated: 2005/5/2 2:21
No life (a.k.a. DattoMaster)
Joined: 2003/5/5
From: Okinawa, Japan
Posts: 1292
 Re: A series high volume oil pump



Quote:
This shows the designs for the bits that need to be manufactured to turn your A series pump into a high volume pump using Z series bits.

Poster Thread
tsillay
Posted: 2005/5/2 3:20  Updated: 2005/5/2 3:20
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Joined: 2002/11/26
From: Wellington New Zealand
Posts: 468
 Re: A series high volume oil pump
The spacer can be easily made by milling down another 1200 pump housing. You don't then have to worry about getting all the holes in the right places.
60psi is heaps at these kinds of volumes

there's a thread on this somewhere, stirlingmac may even have posted the piccies of the pump out of my old shellsport car..

Poster Thread
1200coupe
Posted: 2005/5/2 3:46  Updated: 2005/5/2 3:46
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Joined: 2003/9/17
From: Canberra
Posts: 512
 Re: A series high volume oil pump
I did a search on this and couldnt find anything in detail about these mods. Thats why I posted the details. I wish I had a spare A12 pump so I didnt have to make the spacer from scratch. I had a look for a spare pump in my back shed, lots of goodies in there by unfortunately no spare pump

Poster Thread
1200coupe
Posted: 2005/5/2 8:33  Updated: 2005/5/2 8:33
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Joined: 2003/9/17
From: Canberra
Posts: 512
 Re: A series high volume oil pump
Quote:
60psi is heaps at these kinds of volumes


Can anyone tell me what the oil pressure is for an unmodified A series pump. After I have built this new pump I want to see exactly what difference it makes to oil pressure when putting flat washers under the pressure relief spring in the pump.
I ask because I thought the pressure relief spring was there to by pass the filter if it ever got blocked. I need to be convinced that there is some real value in increasing the relief valves spring pressure. Some real figures would be nice to start with.

Anyone!!

Poster Thread
kegs
Posted: 2005/5/2 9:26  Updated: 2005/5/2 9:26
No life (a.k.a. DattoMaster)
Joined: 2003/1/5
From: campbelltown (sydney) australia
Posts: 1802
 Re: A series high volume oil pump
i dont think you would need to touch the p.r valve as u dont need the pressure to rise, only the volume. changing the pump will make more volume so am i right in saying the pressure wont change unless u change the drive ratio?

Poster Thread
1200coupe
Posted: 2005/5/3 1:13  Updated: 2005/5/3 1:13
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Joined: 2003/9/17
From: Canberra
Posts: 512
 Re: A series high volume oil pump
Kegs,
I believe you are right, I have the same opinion although I do expect a little pressure rise at the pump, but it is the volume I am interested in and dont want a huge increase in oil pressure otherwise I will start blowing seals in the motor. Looks like I have to take a pressure reading with engine hot before and after the pump change.
I would still be interested to hear from anyone that has increased the spring pressure on the relief valve and has accurate oil pressure readings to go with the changes.

Poster Thread
1200rallycar
Posted: 2005/5/3 3:25  Updated: 2005/5/3 3:25
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Joined: 2002/3/20
From: Melbourne, Australia
Posts: 8221
 Re: A series high volume oil pump
sounds interesting, keep us posted on the results, sorry cant help with reading, surely someone has a pressure gauge rigged up???

Poster Thread
dattodevil
Posted: 2005/5/3 10:39  Updated: 2005/5/3 10:39
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Joined: 2004/1/20
From: Christchurch. NZ
Posts: 1382
 Re: A series high volume oil pump
According to the datsun manual the pressure should be 43 - 50 PSi @ 2000 rpm (hot)

Poster Thread
dattodevil
Posted: 2005/5/3 10:42  Updated: 2005/5/3 10:42
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Joined: 2004/1/20
From: Christchurch. NZ
Posts: 1382
 Re: A series high volume oil pump
Quote:
I ask because I thought the pressure relief spring was there to by pass the filter if it ever got blocked.


There is in some filters a bypass valve to stop the oil filter exploding if it becomes blocked. This is seperate from the pressure relief valve in the oil pump.

Poster Thread
1200coupe
Posted: 2005/5/4 0:58  Updated: 2005/5/4 0:58
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From: Canberra
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 Re: A series high volume oil pump
Thanks dattodevil for the standard oil pressure info.
Its no wonder I was confused, I thought there was one valve in the oil pump that did both jobs. I made the time last night and had a detailed look at the standard pump design and surprise surprise there are two valves in the pump.
They are:
OIL PRESSURE RELIEF VALVE
Designed to by pass the oil back into the main gallery when and if filter becomes blocked.
OIL PRESSURE REGULATOR VALVE
Designed to give a pre set oil pressure.
It all makes sense now and sorry to other members if I led you astray.
I can now go off and start making all the bits needed to make one HP pump out of two - yippee

Poster Thread
1200coupe
Posted: 2005/5/10 1:01  Updated: 2005/5/10 1:01
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From: Canberra
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 Re: A series high volume oil pump
I found out last night that the L series oil pump is exactly the same as the Z series oil pump so if members want to build a high volume oil pump you can use the guts out of either L or Z series pumps.

Now I need the answer to one more question - can anyone tell me what volume of oil the standard A series oil pump is rated at because I cant find the figures anywhere.
Thanks in advance.

Poster Thread
L18_B110
Posted: 2005/5/10 3:22  Updated: 2005/5/10 3:22
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Joined: 2002/8/6
From: Brisbane, Australia
Posts: 3792
 Re: A series high volume oil pump
Quote:
I found out last night that the L series oil pump is exactly the same as the Z series oil pump

that's because this is an L series oil pump - you've just been calling it a Z series pump. The 240Z that you got it from has an L series 6 cyl engine (originally L24).

Poster Thread
1200GXman
Posted: 2010/2/2 10:13  Updated: 2010/2/2 10:13
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From: South Africa, Bloemfontein
Posts: 1469
 Re: A series high volume oil pump
Did anyone ever get an update if this worked?

I can get an L series oil pump but am a bit confused by the guy at the wreckers. He asked me what L series oil pump do I want because you got a low pressure pump and a high pressure pump. Apparently the oval track racers uses the high pressure pump. I said I would come back to him to fist find out from you guys if this is true.

Poster Thread
ROConnor
Posted: 2010/2/2 10:21  Updated: 2010/2/2 10:21
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From: Melbourne, Oz
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 Re: A series high volume oil pump
Iv got a bunch of pumps that Im yet to start playing with will get onto it soon and let you know how it go's..

Poster Thread
1200GXman
Posted: 2010/2/2 10:26  Updated: 2010/2/2 10:26
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From: South Africa, Bloemfontein
Posts: 1469
 Re: A series high volume oil pump
Thanks. When the A12 is hotted up a bit, I want to build a high volume oil pump for it as well.

Poster Thread
ROConnor
Posted: 2010/2/2 10:51  Updated: 2010/2/2 10:51
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From: Melbourne, Oz
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 Re: A series high volume oil pump
I'll pictorial it as I go shouldent be to hard, But I think I'm gona make a whole new shaft.

Poster Thread
rgjt405
Posted: 2013/5/13 5:46  Updated: 2013/5/13 5:46
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From: Kelowna, BC, Canada
Posts: 56
 Re: A series high volume oil pump
Has anyone actually built one of these "hybrid" pumps using the A-series and the L-series pumps?
Just wondering as my A-series competition pump is giving me problems. The by-pass valves opens when cold, then it won't completely close. This greatly reduces the engine oil pressure so that when it idles, I have no oil pressure because all of the flow is being directed back into the pan. I took the pump apart and the by-pass plunger was stuck partially open. I had to force it out. I found some fillings stuck in the port. This is not a good sign about the condition of the bearings. Must now pull the engine apart and check it thoroughly. I really don't want to take a chance in using my competition pump with the oil cooler. I may have to revert to the stock pump, get a remote adapter with oil cooler ports. This is not my preferred choice because of the lower flow as compared to the competition pump.

Poster Thread
ddgonzal
Posted: 2013/5/13 6:28  Updated: 2013/5/13 6:30
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Joined: 2001/5/3
From: 48 North
Posts: 31656
 Re: A series high volume oil pump
Quote:
Has anyone actually built one of these "hybrid" pumps using the A-series and the L-series pumps?

These hybrid high-volume pumps have been made by many.

See Hybrid oil pump


By the way, the Z-series engines (Z18/Z20/Z22/Z24) also use the L-series engines oil pumps since Z-series engine is based on L-series design but with a newer cylinder head design.

Poster Thread
rgjt405
Posted: 2013/5/16 2:35  Updated: 2013/5/16 2:35
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From: Kelowna, BC, Canada
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 Re: A series high volume oil pump
Anybody willing to sell one?