[Healeys] oil pump
edriver at sasktel.net
Tue Oct 30 14:01:45 MDT 2018
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.
Web master Saskatchewan British Car Club
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
> On 10/30/2018 5:12 AM, simon.lachlan at alexarevel.plus.com
> <mailto:simon.lachlan at alexarevel.plus.com> wrote:
> Has anyone got the Denis Welch oil pump ENG672M? See:-
> 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.
> Support Team.Nethttp://www.team.net/donate.html
> Suggested annual donation $12.75
> Archive:http://www.team.net/pipermail/healeys http://autox.team.net/archive
> Healeys at autox.team.net <mailto:Healeys at autox.team.net>
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
> Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive
> Healeys at autox.team.net
> Unsubscribe/Manage: http://firstname.lastname@example.org
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Healeys