[Healeys] Parts from UK BJ8

Wed Feb 22 08:14:11 MST 2023

I fitted the Welch “High Capacity” pump some years back. Gained some psi across the range. Only fitted because it turned up brand new and v.cheap on eBay.

Anyhow, I dug up the attached which is rather long and rather above my technical skills or interest….I’d imagine it’s been around the block a few times so most of you will have it filed away.

Simon

From: Healeys <healeys-bounces at autox.team.net> On Behalf Of Bob Spidell
Sent: 22 February 2023 14:08
To: healeys at autox.team.net
Subject: Re: [Healeys] Parts from UK BJ8

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 <https://www.knr-inc.com/shop-talk-articles.html?id=101:200110-lycoming-oil-pumps&catid=25> &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 <mailto: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 <mailto:boyracer466 at gmail.com> 

On Feb 21, 2023, at 7:35 PM, Alan Seigrist <healey.nut at gmail.com <mailto: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 <mailto: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 <mailto:boyracer466 at gmail.com> 

On Feb 21, 2023, at 6:49 PM, Alan Seigrist <healey.nut at gmail.com <mailto: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 <mailto: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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