[Healeys] oil pump

[Bob Spidell]

It's kinda like blood pressure.  Except, lower BP is better.


On 10/30/2018 6:55 PM, Engl wrote:
> Hi Ed
>
> Indeed, oil pressure on your car (still think of it as your car!) is 
> great as you indicate.
>
> Bob England
>
> On Oct 30, 2018, at 2:01 PM, E.A. Driver <edriver at sasktel.net 
> <mailto:edriver at sasktel.net>> wrote:
>
>> Good afternoon
>> As with Bruce and Bob  at rebuild of a BJ8 engine I added DWR hcpump 
>> in 2000,  although I sold the car in 2016, I assume the current 
>> owner  will verify that  oil pressure during driving still ranges 
>> from 55 to 60 psi and at idle 20-25psi.  As Michael has stated if the 
>> correct bearing clearances were met during rebuild there should be no 
>> issues.
>> Cheers
>> Ed
>>
>> E.A. Driver
>> Web master Saskatchewan British Car Club
>> Saskatoon, Saskatchewan
>> Canada
>>
>>
>> On 30/10/2018 9:52 AM, Bruce Steele wrote:
>>>
>>> I echo Bob’s comments.  I’ve had the DWR high capacity pump for years.
>>>
>>> Bruce Steele
>>>
>>> Brea, CA
>>>
>>> 1960 BN7
>>>
>>> *From:*Healeys [mailto:healeys-bounces at autox.team.net] *On Behalf Of 
>>> *Bob Spidell
>>> *Sent:* Tuesday, October 30, 2018 7:17 AM
>>> *To:* healeys at autox.team.net
>>> *Subject:* Re: [Healeys] oil pump
>>>
>>> I'll offer what I know/have heard*.  I have the 'high capacity' type 
>>> in my BJ8, which is what the DWR techs/sales people recommended for 
>>> a road car.  Older 6-cyl cars had a rotor type pump.  They (the 
>>> rotor type) are supposed to be more efficient--i.e. they pump more 
>>> oil--at lower RPMs.  At some point it was discovered, probably from 
>>> service bay repairs, that this type of pump put an excessive shear 
>>> load on the bevel gears on the cam that drive the pump, causing them 
>>> to wear out.  Later cars started getting the gear type pump, which 
>>> is less efficient at lower RPMs but puts less of a load on the cam, 
>>> and is probably less expensive to manufacture as well (esp. if the 
>>> gears are the sintered iron variety).  I think the bevel gears on 
>>> the cams were re-engineered, IIRC they got an additional tooth to 
>>> spread the load.
>>>
>>> The Welch HC pump is the rotor type.  I did a full engine rebuild 
>>> and installed the DWR HC pump; I didn't notice any pressure change 
>>> worth mentioning--I 'gained' 15 PSI at idle when I had my gauge 
>>> overhauled--but the 'high capacity' I believe refers to volume 
>>> rather than pressure (which, of course, is mostly dictated by engine 
>>> speed).   The 'standard type' pump is a gear type, hence it's more 
>>> appropriate for high-RPM race engines as pump flow is proportional 
>>> to RPM, and at 6K RPM or more you'll get plenty of oil with less 
>>> load from the gear type.
>>>
>>> I'm not positive, but if you look at the photos closely, you can see 
>>> the 'gallery plug' on the top of the case.  I suppose it allows 
>>> inspection of the innards of the pump without having to break the 
>>> case. I believe it's threaded so not likely to pop out.  If you're 
>>> getting a new pump you'll likely need a new drive shaft and, 
>>> surprisingly, DWR sells it cheaper than our (US) vendors sell it at 
>>> (I think they might import the DWR shaft).
>>>
>>> * apply appropriate grains of salt
>>>
>>> Bob
>>>
>>> On 10/30/2018 5:12 AM, simon.lachlan at alexarevel.plus.com 
>>> <mailto:simon.lachlan at alexarevel.plus.com> wrote:
>>>
>>>     Hi,
>>>
>>>     Has anyone got the Denis Welch oil pump ENG672M? See:-
>>>
>>>     https://www.bighealey.co.uk/performance-parts/austin-healey/engines/3000-bottom-end?page=3
>>>
>>>
>>>         Their text:- “Heat treated castings for longer life and
>>>         removable gallery plugs to be sure it is clean are
>>>         advantages of both types of oil pumps we offer. We recommend
>>>         the high capacity for all road engines using a standard type
>>>         crank up to 6000 rpm and the standard pump for race engines,
>>>         steel cranks or anything over 6000 rpm. Both are precision
>>>         machined and assembled in-house to control the highest quality.
>>>         - ENG672 is the standard type.
>>>         - ENG672M is the high capacity pump.”
>>>
>>>     What are “removable gallery plugs”?
>>>
>>>     Is it just me or is the above a bit counter-intuitive? “High
>>>     capacity” for road cars and “standard” for race engines? Surely
>>>     the highest capacity is needed where the engine is working
>>>     hardest ie racing?
>>>
>>>     And don’t I remember that, with the standard BMC pumps, the
>>>     older type is reckoned to be better than the newer type? Is this
>>>     something similar to Denis Welch’s two pumps?
>>>
>>>     Anyhow, if anyone’s got one…..what’s it like? Did the oil
>>>     pressure improve at all?
>>>
>>>     I’m guessing that most people will have fitted one as part of a
>>>     big rebuild thus they won’t have straightforward “before and
>>>     after” comparisons. I’m thinking of fitting mine to my engine as
>>>     part of a small winter project and hope I can squeeze a few more
>>>     psi into the system.
>>>
>>>

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