[Healeys] Parts from UK BJ8
Bob Spidell
bspidell at comcast.net
Wed Feb 22 07:08:09 MST 2023
This was news to me (from Roger Moment's new book; 'engine' section):
"I have found new gear-type pumps to have one gear a few thousandths of
an inch taller than the other, and neither with the proper clearance to
the bottom cover plate. This required finding someone with a grinding
table who could make the gears identical, and then also machine the
bottom of the pump housing so that the proper end clearance to the cover
plate would result." I would at least check this on a gear-type pump.
The only knock on the vane-type pumps that I've aware of is that the
resistance was so high it would cause the cam gear driving it to wear
and eventually be stripped. I think this was addressed by adding an
extra tooth to the pump driveshaft driven gear, hence lowering the
torque on the gears. I have no supporting evidence offhand, but I recall
reading this somewhere (now if I could just remember where I put my keys).
FWIW, I have about 7K miles on the 'upgraded'--presumably
rotary-type--pump from DWM in my BJ8 and my oil pressure is stable, and
no metal in the oil. I believe the gear-type pump's gears are made of
sintered iron; which I recall from long ago caused problems in some
aircraft piston engines--Lycomings* IIRC--and I've never really trusted
them since (though my Mustang GT with 475HP has a pump with sintered
gears with no issues that I know of, but aftermarket vendors offer ones
with machined gears for boosted engines).
Side note: When my dad was a factory rep for Ford back in the sixties,
he said owners would bring their cars in because 'The oil pressure drops
at idle.' Possibly one reason why manufacturers went to idiot lights,
though I suspect cost was the major factor.
*
https://www.knr-inc.com/shop-talk-articles.html?id=101:200110-lycoming-oil-pumps&catid=25
On 2/21/2023 11:18 PM, Alan Seigrist via Healeys wrote:
> As I understand it, the rotary vane was much better for maintaining
> pressure at low rpms, which is good for a road car.
>
> On Wed, Feb 22, 2023 at 2:18 PM Ricchardd Mayor
> <boyracer466 at gmail.com> wrote:
>
> The rotary vane pump was used in the 100/6 - 26D - engines. It
> caused many problems. It is not suitable for any use, contrary to
> what someone may be trying to sell you.
>
>
> Richard Mayor
> boyracer466 at gmail.com
>
>
>> On Feb 21, 2023, at 7:35 PM, Alan Seigrist <healey.nut at gmail.com>
>> wrote:
>>
>> As I understand it, the rotary vane pump is superior for road
>> applications, gear pump superior for racing applications.
>>
>>
>> On Wed, Feb 22, 2023 at 11:32 AM Ricchardd Mayor
>> <boyracer466 at gmail.com> wrote:
>>
>> Bob, The brand name is “County” ….. not “Country”. Whatever
>> brand you buy just be sure it is the gear style oil pump.
>>
>>
>> Richard Mayor
>> boyracer466 at gmail.com
>>
>>
>>> On Feb 21, 2023, at 6:49 PM, Alan Seigrist
>>> <healey.nut at gmail.com> wrote:
>>>
>>> Not sure why but Longstone Tyres in the UK has crazy good
>>> shipping rates. It's not the same with anyone else.
>>>
>>> Generally speaking when ordering parts from the UK, it seems
>>> to add about 30% to the total price. I have had better luck
>>> with DHL or Royal Post shipping for reliability of delivery
>>> in the past... seems customs works in concert with USPS &
>>> DHL (Deutsche Post) to protect USPS, so FedEx and UPS
>>> sometimes can get hung up in customs. It may have improved,
>>> not sure....
>>>
>>> On Wed, Feb 22, 2023 at 3:31 AM <rfbegani at gmail.com> wrote:
>>>
>>> I have decided to replace my oil pump and my rear
>>> bumper. I remember you all seem to say that Moss pumps
>>> are from country and are not satisfactory, and we should
>>> buy from the UK such as Dennis Welch.
>>>
>>> Also, have decided to replace my original real bumper
>>> because it is scratched and blackened in places.
>>>
>>> Also, as the pound is 1.21 to the dollar the parts from
>>> DM are almost ½ price from Moss and others. My
>>> experience with UK on buying Michelin Tires was great
>>> because freight charges via HM Post is very inexpensive
>>> and direct to my door. Is DM freight similar?
>>>
>>> Bob Begani
>>>
>>> 67 BJ8
>>>
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>>
>
>
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